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ASRock B850 Pro RS WiFi vs ASRock X870 Pro RS WiFi

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Product A: ASRock

B850 Pro RS WiFi

62 of 78 known

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B

Product B: ASRock

X870 Pro RS WiFi

65 of 78 known

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Only differences

AASRock B850 Pro RS WiFi

BASRock X870 Pro RS WiFi

General

2 of 9 differ

Series

Pro1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Chapter 1 calls the B850 Pro RS WiFi and the B850 Pro RS one family. The shop copy of ASRock's text calls the Race Sport (RS) Edition an evolution of the PRO series.

Pro2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The review calls the board the Pro RS WiFi and the lowest tier of ASRock's X870 range. ASRock's product photos on retailer pages print PRO SERIES on the box and the rear I/O cover.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

B850 Pro RS WiFi, 90-MXBQL0-A0UAYZ1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Manual cover: B850 Pro RS WiFi. The order code 90-MXBQL0-A0UAYZ comes from the retailer listings below.5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 2026Product code 90-MXBQL0-A0UAYZ.6Retailer pageshop.mnetworks.dk/asrock-b850-pro-rs-wifi/cat-p/c/p1005560262Read 15 October 2026Part number 90-MXBQL0-A0UAYZ.

X870 Pro RS WiFi, 90-MXBQ00-A0UAYZ1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Manual cover and title: X870 Pro RS WiFi. The order code 90-MXBQ00-A0UAYZ comes from the retailer listings below.6Retailer pagetest-b2b.100mega.com/en/311835-asrock-x870-pro-rs-wifiRead 15 October 2026Part number 90-MXBQ00-A0UAYZ.7Retailer pagearvutitark.ee/en/pc-components/motherboards/plyta-glowna-asrock-x870-pro-rs-wifi-1402664Read 15 October 2026Product code 90-MXBQ00-A0UAYZ.

GTIN / EAN

47115814901786Retailer pageshop.mnetworks.dk/asrock-b850-pro-rs-wifi/cat-p/c/p1005560262Read 15 October 2026Lists EAN 4711581490178 for part number 90-MXBQL0-A0UAYZ.7Retailer pagekomputronik.pl/product/955011/plyta-glowna-asrock-b850-pro-rs-wifi.htmlRead 15 October 2026Lists Kod EAN 4711581490178 for manufacturer code B850 Pro RS WiFi.

47104839493336Retailer pagetest-b2b.100mega.com/en/311835-asrock-x870-pro-rs-wifiRead 15 October 2026The listing shows EAN 4710483949333 for part number 90-MXBQ00-A0UAYZ. The check digit is valid.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

Not available

2 September 20245Press articlethefpsreview.com/2024/09/02/asrock-launches-seven-x870e-x870-series-motherboards-including-x870e-taichi-and-x870e-nova-wifiRead 15 October 2026The FPS Review article of 2024-09-02 says ASRock published its X870E/X870 microsite and revealed seven AM5 boards, including the X870 PRO RS WiFi. ASRock's own press page was not readable. Funky Kit's copy of ASRock's press release, used for other X870 boards in this catalog, is dated 2024-09-30.

Status

Available4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 2026Review of 2025-11-28 with an Amazon price of $159. The board was on sale then.5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 2026The listing shows 10 pieces available to order on 2026-10-15.

Available7Retailer pagearvutitark.ee/en/pc-components/motherboards/plyta-glowna-asrock-x870-pro-rs-wifi-1402664Read 15 October 2026The listing shows a price of 224.30 EUR on 2026-10-15.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$189.992Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026The review's spec table says MSRP $189.99 USD and the summary calls the board a $189.99 motherboard. US price, excl. sales tax. It is a reviewer's statement, not ASRock's.

$2092Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The introduction says the board has a retail MSRP of $209, and the conclusion repeats $209 for the WiFi model against $199 for the X870 Pro RS. The review was published 2024-10-28. US price, excl. sales tax. It is the reviewer's statement, not ASRock's. PC Perspective's summary of the review rounds it to $210.4Press articlepcper.com/2024/10/asrock-x870-pro-rs-has-an-exceptionally-clean-backplate-and-much-moreRead 15 October 2026Summary of the FPS Review: The $210 X870 Pro RS WiFi has WiFi 7. The FPS Review itself says $209.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Not available

Not available

SegmentiThe maker's own product category, e.g. ASUS ProArt is Creator. It is not assigned from price or features. Maker lines that are not gaming, creator or workstation lines, such as ASUS PRIME, MSI PRO and ASRock Pro, are mainstream.

Mainstream1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The board is an ASRock Pro series board (Pro RS). It is not a Phantom Gaming, Steel Legend or Taichi board, so it is mainstream by the field rule.

Mainstream2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The review says ASRock markets the board as more general purpose and content creation, while the Steel Legend and Riptide are more gaming-centric. ASRock Pro boards are mainstream by the field rule.

Board revisioniThe maker's revision name, e.g. rev. 1.1, for variant rows of revisions that keep the board's name and model number. Leave it out when the maker names no revision.

Not available

Not available

Platform

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CPU socketiSocket name without spaces, e.g. AM5 or LGA1851.

AM51Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026

AM51Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: AMD Socket AM5.

ChipsetiChipset with its brand and without the word chipset, e.g. AMD B850, AMD X870E or Intel Z890. Same form as desktop PCs and as compatible chipsets on CPUs.

AMD B8501Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026

AMD X8701Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: AMD X870.

Supported processorsiProcessor series the maker lists for the board, one item per series in the chip maker's name. BIOS updates can add series later.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors. The manual refers to the maker's website for the CPU support list. Read on 2026-10-15.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors. The manual refers to the maker's website for the CPU support list. Read on 2026-10-15.

CPU overclockingiThe board allows multiplier overclocking of an unlocked CPU. Memory overclocking alone does not count.

Yes10Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 15 October 2026AMD's chipset page says the B850 platform has enhanced overclocking capabilities and DDR5 memory overclocking with EXPO. This is the chip maker's page, not the board maker's.

Yes11Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 15 October 2026AMD's chipset page describes the X870 platform as fully overclockable. This is the chip maker's page, not the board maker's.

Board

0 of 5 differ

Form factoriThe maker's stated board standard. Other covers sizes such as XL-ATX or Mini-DTX.

ATX1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: ATX Form Factor.

ATX1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: ATX Form Factor.

Board dimensionsiSize of the board itself. Height runs along the rear I/O edge, as the board stands in a tower case. ATX is 244 mm wide and 305 mm high. Micro ATX is 244 mm high and up to 244 mm wide. A size with a cover that reaches past the board, as NZXT prints, is not used when the maker also states the board size.

Width244Height305mm(9.6 × 12 in)2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Spec table: size 305 mm x 244 mm, ATX.6Retailer pageshop.mnetworks.dk/asrock-b850-pro-rs-wifi/cat-p/c/p1005560262Read 15 October 2026ATX Form Factor: 12.0-in x 9.6-in, 30.5 cm x 24.4 cm.7Retailer pagekomputronik.pl/product/955011/plyta-glowna-asrock-b850-pro-rs-wifi.htmlRead 15 October 2026Dimensions table: 244 mm and 305 mm.12Retailer pagecomputermania.co.za/products/asrock-b850-pro-rs-wi-fi-atx-motherboard-amd-am5-ddr5-pcie-5-0Read 15 October 2026Spec copy: ATX Form Factor (30.5 cm x 24.4 cm).

Width244Height305mm(9.6 × 12 in)2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Spec table: length 305 mm, width 244 mm, ATX.6Retailer pagetest-b2b.100mega.com/en/311835-asrock-x870-pro-rs-wifiRead 15 October 2026Board 305 x 244 mm, ATX.

PCB layersiCopper layers in the circuit board as published.

81Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: 8 Layer PCB.2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Text: an 8-layer PCB design.4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 2026A black 8-layer PCB.

81Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: 8 Layer PCB.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Text: an 8-layer high-quality PCB design.8Retailer pagepccomponentes.com/placa-base-asrock-x870-pro-rs-wifiRead 15 October 20268 Layer PCB design.

Back-connect designiPower, fan and front-panel connectors sit on the back of the board to hide the cables, e.g. ASUS BTF, MSI Project Zero or GIGABYTE Stealth. It needs a case made for it.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The layout on pages 7 and 8 shows the usual front-side power, fan and USB connectors. The board is not a back-connect design.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The layout on pages 7 and 8 shows the usual front-side power, fan and USB connectors. The board is not a back-connect design.

RGB lighting on the boardiLEDs on the board itself. Headers for external lighting are counted under Internal connectors. True only when the maker's spec or feature list names lighting on the board. A single small LED that a reviewer sees does not count.

Yes2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026The text says the board has RGB lighting under the armor of the 3rd and 4th M.2 slots. Tech2Geek describes an aRGB zone on the shared M.2 heatsink. The maker's text that was readable names only the Polychrome RGB headers.4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 2026An aRGB zone is integrated in the heatsink shared by two M.2 slots, with customizable lighting. The box names Polychrome Sync aRGB technology.

Yes2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The text says an RGB LED strip runs just below the M.2 #2 and #3 heatsink, as on the Steel Legend and Riptide, controlled by ASRock Polychrome Sync.8Retailer pagepccomponentes.com/placa-base-asrock-x870-pro-rs-wifiRead 15 October 2026The shop copies ASRock's feature heading POLYCHROME RGB.

Power delivery

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Power stage layoutiAs the maker publishes it, e.g. 18+2+2. The first number is the CPU core (Vcore) rail. Makers group the other rails differently, so compare the first number. Doubled or teamed stages are written as the maker prints them, such as MSI's 12+2+1 Duet Rail. A review's count of real phases goes in the source note.

14+2+12Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026The same 14+2+1 power phase design with the same 80A SPS for VCore, SOC and MISC.4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 2026Two aluminum heatsinks cool the power delivery (14 + 2 + 1, SPS 80A for Vcore, SOC and MISC), with no heatpipe between them.5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 2026The shop copies ASRock's feature text: 14+2+1 Phase Power Design, 80A Dr.MOS for VCore+SOC+MISC.9Press articleweekly.ascii.jp/elem/000/004/244/4244804Read 15 October 2026Calls it the ATX model of the Pro RS series with a 14+2+1 phase power circuit using Dr.MOS.

14+2+12Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The board features a 14+2+1 power phase VRM, 80Amp, with Dr.MOS SPS for VCore+SOC, like the X870 Riptide WiFi.4Press articlepcper.com/2024/10/asrock-x870-pro-rs-has-an-exceptionally-clean-backplate-and-much-moreRead 15 October 2026Calls it a 14+2+1 Power Phase with 80A Dr.MOS.8Retailer pagepccomponentes.com/placa-base-asrock-x870-pro-rs-wifiRead 15 October 2026The shop copies ASRock's text: 14+2+1 Phase Power Design, 80A Dr.MOS for VCore+SOC.9Retailer pagecomputerassistance.co.uk/product/asrock-x870-pro-rs-wifi-amd-am5-socket-motherboard-atx-4x-ddr5-slots-3x-m-2-sockets-fitted-i-o-shield-2-5gbe-lan-wi-fi-7-1x-hdmi-port-2x-usb-c-usb4Read 15 October 202614+2+1 Power Phase, 80A Dr.MOS for VCore+SOC+MISC with Enlarged Heatsink Armor.

CPU core (Vcore) power stagesiPower stages on the Vcore rail. Makers call them phases or power stages. A doubled design has more stages than controller phases. Use the first number of the maker's layout, such as 14 for MSI's 14+2+1 Duet Rail. A review's different count goes in the source note.

142Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 202614 Vcore phases of the 14+2+1 design.4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 202614 Vcore stages of the 14+2+1 design.5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 2026The first number of 14+2+1 is the Vcore rail.

142Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The first number of 14+2+1 is the Vcore rail.10Reviewsogi.com.tw/talks/%E8%8F%AF%E6%93%8EASRock-X870-PRO-RS-WIFI%E4%B8%BB%E6%A9%9F%E6%9D%BF-%E8%90%AC%E5%85%83%E5%85%A7%E5%84%AA%E8%B3%AA%E9%81%B8/6270854Read 15 October 202614+2+1 phases of Dr.MOS.

Vcore power stage ratingiCurrent rating of each Vcore power stage. Only a figure the maker or a copy of the maker's text states. A review's reading of the chip markings is not enough.

80A2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 202680A SPS for VCore, SOC and MISC.4Reviewtech2geek.net/asrock-b850-pro-rs-wi-fi-review-the-budget-motherboard-that-nails-am5-performanceRead 15 October 2026SPS 80A for Vcore, SOC and MISC.5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 202680A Dr.MOS for VCore+SOC+MISC, as the shop copies ASRock's text.

80A8Retailer pagepccomponentes.com/placa-base-asrock-x870-pro-rs-wifiRead 15 October 202680A Dr.MOS for VCore+SOC, as the shop copies ASRock's text. ASRock's Pro RS WiFi text on another shop reads 80A Dr.MOS for VCore+SOC+MISC.9Retailer pagecomputerassistance.co.uk/product/asrock-x870-pro-rs-wifi-amd-am5-socket-motherboard-atx-4x-ddr5-slots-3x-m-2-sockets-fitted-i-o-shield-2-5gbe-lan-wi-fi-7-1x-hdmi-port-2x-usb-c-usb4Read 15 October 202680A Dr.MOS, as the shop copies ASRock's text.

VRM controlleriPWM controller chip with maker, e.g. MPS MP2857. One name: the maker's when published, otherwise the one name a review uses. No parentheses. Other names go in the source note. Use the part number without the date code in the chip marking.

Not available

Richtek RT3678BE10Reviewsogi.com.tw/talks/%E8%8F%AF%E6%93%8EASRock-X870-PRO-RS-WIFI%E4%B8%BB%E6%A9%9F%E6%9D%BF-%E8%90%AC%E5%85%83%E5%85%A7%E5%84%AA%E8%B3%AA%E9%81%B8/6270854Read 15 October 2026Traditional Chinese review of 2025-07-25: CPU power uses 14+2+1 Dr.MOS phases with an RT3678BEGQW PWM controller. RT is the Richtek prefix and GQW is the package suffix, so Richtek RT3678BE is stored, in the form used for other boards. Single review. ASRock does not document the part.

CPU power connectorsiEPS 12 V connectors for the CPU as pin counts, e.g. 8+8 pin, 8+4 pin or 8 pin.

8+8 pin1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x 24 pin ATX power connector and 2 x 8 pin 12V power connectors (Hi-Density Power Connector).

8+8 pin1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x 24 pin ATX power connector and 2 x 8 pin 12V power connectors (Hi-Density Power Connector).

Extra slot power connectoriA PCIe or other power connector on the board that feeds the expansion slots. The 24-pin and CPU connectors do not count. A connector the maker ties only to a front USB-C header does not count.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The connector list has no extra slot power connector. The manual never states that one is absent.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The connector list has no extra slot power connector. The manual never states that one is absent.

Memory

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Memory type

DDR51Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026

DDR51Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: Dual Channel DDR5 memory.

Memory slotsiDIMM slots on the board.

41Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026

41Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026

Max memoryiMaximum total capacity the maker states for the board. The maker's product page wins over an older manual, since a BIOS update can raise the value.

256GB1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: 4 x DDR5 DIMM slots, max. capacity of system memory 256GB, dual channel.

256GB1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications, page 2: max. capacity of system memory 256GB.

Max memory speed (overclocked)iHighest overclocked speed the maker lists for one module per channel, with the newest CPU family the board is sold for, e.g. Ryzen 9000 or Core Ultra 200S. Ryzen 8000 values are never used. The source note names the family and the other module setups. It is not the CPU's official speed. A JEDEC-only list such as 5600/4800 is not this value. When the maker lists a manual overclock and a memory profile speed, the higher one is stored. The maker's product page wins over an older manual, since a BIOS update can raise the value. A table that names the CPU family wins over a headline speed that names none.

8,000MT/s1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC). The manual names no CPU family or module setup. It refers to the Memory Support List on the maker's website.

8,000MT/s1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Supports DDR5 ECC/non-ECC, un-buffered memory up to 8000+(OC). The manual names no CPU family or module setup. It refers to the Memory Support List on the maker's website.

ECC memoryiThe board runs unbuffered ECC modules with ECC active. A board that runs ECC modules in non-ECC mode does not count. DDR5 on-die ECC does not count. A maker list of ECC and non-ECC unbuffered memory with no non-ECC mode qualifier counts as true, as on ASUS and ASRock AM5 boards. A note that ECC mode depends on the CPU, as ASUS writes for AM4 boards, still counts as true.

Yes1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The manual says DDR5 ECC/non-ECC, un-buffered memory. It does not say whether ECC is active with each CPU.

Yes1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The manual says DDR5 ECC/non-ECC, un-buffered memory with no non-ECC mode qualifier.

CUDIMM supportiThe board runs clocked unbuffered DIMMs (CUDIMM) with the clock driver active. Clock driver bypass mode only does not count. A plain "Supports CUDIMM" with no bypass limit, as ASRock and ASUS write it, counts as true.

Not available

Not available

Expansion slots

0 of 3 differ

Expansion slotsiPhysical card slots. Storage M.2 slots are listed under Storage. The M.2 slot of a pre-installed Wi-Fi module is not listed. A full-length slot wired for x4 is PCIe x16 with 4 lanes.

AASRock B850 Pro RS WiFi

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	4	4	Chipset	1

Source1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026CPU: 1 x PCIe 5.0 x16 slot (PCIE1) at x16. PCIE1 runs Gen5x16 with Ryzen 9000 and 7000, Gen4x8 with Ryzen 8000 (Phoenix 1) and Gen4x4 with Ryzen 8000 (Phoenix 2). Chipset: 1 x PCIe 4.0 x16 slot (PCIE2) at x4, which is disabled when M2_3 is occupied. The M.2 socket (Key E) for the Wi-Fi module is not listed.

BASRock X870 Pro RS WiFi

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	4	4	Chipset	1

Source1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026CPU: 1 x PCIe 5.0 x16 slot (PCIE1) at x16. PCIE1 runs Gen5x16 with Ryzen 9000 and 7000, Gen4x8 with Ryzen 8000 (Phoenix 1) and Gen4x4 with Ryzen 8000 (Phoenix 2). Chipset: 1 x PCIe 4.0 x16 slot (PCIE2) at x4, which is disabled when M2_2 is occupied. The M.2 socket (Key E) for the Wi-Fi module is not listed.

Full-length PCIe slotsiCounts full-length slots, whatever their lane count.

2=CalculatedFrom Expansion slots

2=CalculatedFrom Expansion slots

Fastest PCIe x16 slot generationiHighest PCIe generation of a full-length slot. This is normally the graphics card slot.

5=CalculatedFrom Expansion slots

5=CalculatedFrom Expansion slots

Storage

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M.2 storage slotsiOne row per M key storage slot on the board, front or back. Slots on an included add-in card are not listed. Values are with the CPU family that gives the board its full connectivity. A slot listed for 25110 counts as M.2 22110. A slot listed for 2260 counts as M.2 2280.

AASRock B850 Pro RS WiFi

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink	Shares lanes with
M2_1	5	4	CPU	M.2 2280	No	Yes	Not available
M2_2	4	4	CPU	M.2 2280	No	No	Not available
M2_3	4	4	Chipset	M.2 2280	No	Yes	PCIE2 is disabled when M2_3 is used
M2_4	3	4	Chipset	M.2 2280	No	Yes	M2_4 runs at PCIe 3.0 x2 when SATA3_1 or SATA3_2 is used

Source1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026CPU: M2_1 (Blazing M.2, Key M) type 2280 PCIe Gen5x4 and M2_2 (Hyper M.2) type 2280 PCIe Gen4x4. M2_1 runs Gen5x4 with Ryzen 9000 and 7000 and Gen4x4 with Ryzen 8000. M2_2 runs Gen4x4 with Ryzen 9000, 7000 and 8000 (Phoenix 1) and Gen4x2 with 8000 (Phoenix 2). Chipset: M2_3 (Hyper M.2) type 2230/2242/2260/2280 PCIe Gen4x4 and M2_4 (Ultra M.2) type 2280 PCIe Gen3x4. 2280 is stored for M2_3. If M2_3 is occupied PCIE2 is disabled. If SATA3_1 or SATA3_2 is occupied M2_4 downgrades to Gen3x2. The manual lists every slot with PCIe modes only, so sata is false. The install guides in sections 2.16 to 2.19 show a heatsink to remove on M2_1, M2_3 and M2_4 and none on M2_2. Tech4Gamers confirms three of four slots have heatsinks and M2_2 has none.2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026M.2_1 is PCIe Gen5, M.2_2 and M.2_3 are PCIe Gen4 and M.2_4 is PCIe Gen3. Only 3 out of 4 slots have heatsinks, and M.2_2 has none. M.2_4 drops to Gen3x2 when SATA3_1 and SATA3_2 are used.

BASRock X870 Pro RS WiFi

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink	Shares lanes with
M2_1	5	4	CPU	M.2 2280	No	Yes	Not available
M2_2	4	4	Chipset	M.2 2280	No	Yes	PCIE2 is disabled when M2_2 is used
M2_3	3	4	Chipset	M.2 2280	Yes	Yes	M2_3 runs at PCIe 3.0 x2 when SATA3_1 or SATA3_2 is used

Source1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026CPU: M2_1 (Blazing M.2, Key M) type 2280 PCIe Gen5x4. M2_1 runs Gen5x4 with Ryzen 9000 and 7000 and Gen4x4 with Ryzen 8000. Chipset: M2_2 (Hyper M.2) type 2230/2242/2260/2280 PCIe Gen4x4, stored as 2280. Chipset: M2_3 (Ultra M.2) type 2280 in SATA3 6.0 Gb/s and PCIe Gen3x4 modes, so sata is true only for M2_3. If M2_2 is occupied, PCIE2 is disabled. If SATA3_1 or SATA3_2 is occupied, M2_3 downgrades to Gen3x2. The install guides in sections 2.16 to 2.18 show a heatsink on every slot. The M2_1 heatsink comes off with a push button and the M2_2 and M2_3 heatsinks use screws. The block diagram connects M2_1 to the CPU and M2_2 and M2_3 to the chipset.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026One Gen5 slot from the CPU and one Gen4 and one Gen3 slot from the chipset. The primary heatsink comes off with a quick-release button. The second and third slots sit under one slimmer heatsink held by Phillips screws. All three slots have thermal pads.10Reviewsogi.com.tw/talks/%E8%8F%AF%E6%93%8EASRock-X870-PRO-RS-WIFI%E4%B8%BB%E6%A9%9F%E6%9D%BF-%E8%90%AC%E5%85%83%E5%85%A7%E5%84%AA%E8%B3%AA%E9%81%B8/6270854Read 15 October 2026The Blazing M.2 slot has its own heatsink. The Hyper M.2 and Ultra M.2 slots share one heatsink module.

M.2 slots

4=CalculatedFrom M.2 storage slots

3=CalculatedFrom M.2 storage slots

PCIe 5.0 M.2 slots

1=CalculatedFrom M.2 storage slots

1=CalculatedFrom M.2 storage slots

SATA portsiSATA 6Gb/s connectors on the board. SlimSAS connectors and M.2 slots that take SATA drives do not count.

41Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 2 x SATA3 6.0 Gb/s connectors on the chipset and 2 x SATA3 6.0 Gb/s connectors on an ASMedia ASM1061.

41Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 2 x SATA3 6.0 Gb/s connectors on the chipset and 2 x SATA3 6.0 Gb/s connectors on an ASMedia ASM1061.

Rear ports

3 of 5 differ

Rear portsiPhysical connectors on the rear I/O panel. Wi-Fi antenna connectors and buttons are not ports. 3.5 mm audio counts analog jacks of any role. A video input, such as the DisplayPort In of a Thunderbolt board, is Other.

AASRock B850 Pro RS WiFi

Type	Version	Count	Max link rate (Gbps)	DP Alt Mode
USB-C	USB 3.2 Gen 2	1	10	Not available
USB-C	USB 3.2 Gen 1	1	5	Yes
USB-A	USB 3.2 Gen 1	4	5	Not available
USB-A	USB 2.0	6	0.48	Not available
HDMI	HDMI 2.1	1	Not available	Not available
Ethernet (RJ45)	Not available	1	2.5	Not available
3.5 mm audio	Not available	3	Not available	Not available

Source1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications and section 1.4 rear panel: 1 HDMI (HDMI 2.1 TMDS/FRL 8G compatible, up to 4K 120Hz), 1 USB 3.2 Gen2 Type-C (10 Gb/s), 1 USB 3.2 Gen1 Type-C (DP-alt mode DP1.4a, up to 4K 60Hz), 4 USB 3.2 Gen1 Type-A, 6 USB 2.0, 1 RJ-45 2.5G LAN and 3 HD audio jacks (Line in, Front Speaker, Microphone). The block diagram prints 5Gb/s for the Gen2 Type-C port, which the specifications list as 10 Gb/s. The specifications are stored. The two antenna ports and the BIOS Flashback button are not ports.

BASRock X870 Pro RS WiFi

Type	Version	Count	Max link rate (Gbps)	Thunderbolt or USB4	Power out (W)	DP Alt Mode
USB-C	USB4	2	40	USB4	15	Yes
USB-A	USB 3.2 Gen 1	4	5	Not available	Not available	Not available
USB-A	USB 2.0	6	0.48	Not available	Not available	Not available
HDMI	HDMI 2.1	1	Not available	Not available	Not available	Not available
Ethernet (RJ45)	Not available	1	2.5	Not available	Not available	Not available
3.5 mm audio	Not available	2	Not available	Not available	Not available	Not available
Optical S/PDIF	Not available	1	Not available	Not available	Not available	Not available

Source1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications and section 1.4 rear panel: 1 HDMI (HDMI 2.1 TMDS/FRL 8G compatible, up to 4K 120Hz), 2 USB4 Type-C (40 Gb/s, supports USB PD 3.0 up to 5V@3A (15W) charging), 4 USB 3.2 Gen1 Type-A, 6 USB 2.0, 1 RJ-45 2.5G LAN, optical SPDIF out, line out and microphone input jacks. The two antenna ports and the BIOS Flashback button are not ports. The USB4 ports show only the CPU's embedded graphics, up to 8K 30Hz, so dp_alt_mode is true for the Type-C video output.

Rear USB ports

12=CalculatedFrom Rear ports

12=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

2=CalculatedFrom Rear ports

2=CalculatedFrom Rear ports

Fastest rear USB port

10Gbps=CalculatedFrom Rear ports

40Gbps=CalculatedFrom Rear ports

ThunderboltiThunderbolt on the rear panel. A header for an add-in card does not count.

Not available

No=CalculatedFrom Rear ports

Internal connectors

1 of 5 differ

Internal USB headersiHeaders for front-panel USB ports. The header count may be left out when the maker states only the front ports served.

AASRock B850 Pro RS WiFi

Header	Max data rate (Gbps)	Headers	Front ports served
USB-C header	20	1	1
USB 3 header (19-pin)	5	2	4
USB 2.0 header (9-pin)	0.48	2	4

Source1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x Front Panel Type C USB 3.2 Gen2x2 header (20 Gb/s), 2 x USB 3.2 Gen1 headers for 4 ports and 2 x USB 2.0 headers for 4 ports. The manual states no USB power output.

BASRock X870 Pro RS WiFi

Header	Max data rate (Gbps)	Headers	Front ports served
USB-C header	20	1	1
USB 3 header (19-pin)	5	1	2
USB 2.0 header (9-pin)	0.48	2	3

Source1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x front panel Type C USB 3.2 Gen2x2 header (20 Gb/s), 1 x USB 3.2 Gen1 header (2 ports) and 2 x USB 2.0 headers (3 ports in total). The manual states no USB power output.

Front USB-C header speed

20Gbps=CalculatedFrom Internal USB headers

20Gbps=CalculatedFrom Internal USB headers

Fan headersiAll fan and pump headers on the board, including CPU, CPU optional, AIO pump and chassis fan headers. Combination connectors that carry fan power together with other lines, such as MSI EZ Conn, do not count. A header that drives several fans, such as GIGABYTE 3_FANS, counts once. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

71Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 2 x CPU fan connectors, 4 x chassis fan connectors and 1 x AIO pump fan connector, all 4-pin.

71Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 2 x CPU fan connectors, 4 x chassis fan connectors and 1 x AIO pump fan connector, all 4-pin.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Seven 4-pin fan headers: two CPU and one AIO pump at the top, three chassis fan headers at the bottom right and a final header behind the I/O panel.

ARGB headersi3-pin 5 V addressable RGB headers. Combination connectors do not count. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

31Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 3 x Addressable LED headers (up to 5V/3A, 15W in total).

31Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 3 x Addressable LED headers (up to 5V/3A, 15W in total).

RGB headersi4-pin 12 V RGB headers. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

11Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x RGB LED header (up to 12V/3A, 36W in total).

11Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Connector list: 1 x RGB LED header (up to 12V/3A, 36W in total).

Networking

3 of 9 differ

Ethernet controllersiOne item per Ethernet chip, as maker plus chip family without suffix letters, e.g. Realtek RTL8126 or Realtek RTL8125. Suffixes and revisions go in the source note. Leave it empty when no maker document or review names the chip. A Killer chip is written with Intel as its maker, such as Intel Killer E3100G.

Realtek RTL81251Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 2.5 Gigabit LAN with the Dragon RTL8125BG. The block diagram labels it Realtek 2.5G LAN RTL8125BG. The suffix BG is stored without letters.2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Dragon RTL8125BG LAN controller, up to 2.5G.

Realtek RTL81251Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 2.5 Gigabit LAN with the Dragon RTL8125BG. The block diagram labels it Realtek 2.5G LAN RTL8125BG. The suffix BG is stored without letters. The FPS Review spec table prints Realtek 8126 5Gbps, which the manual, the block diagram and the same review's text (RTL8125BG) contradict.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 20262.5Gbps wired Ethernet from a Realtek Dragon RTL8125BG in the text. The spec table of the same page prints Realtek 8126 5Gbps, which the manual contradicts.

Ethernet ports

1=CalculatedFrom Rear ports

1=CalculatedFrom Rear ports

Ethernet speediFastest Ethernet port.

2.5Gbps=CalculatedFrom Rear ports

2.5Gbps=CalculatedFrom Rear ports

Wi-Fi includediA Wi-Fi module comes installed. A board sold with and without Wi-Fi is two products.

Yes1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 1.6 and specifications: the B850 Pro RS WiFi comes with an 802.11axe Wi-Fi 6E and BT module in the Key E socket.

Yes1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 1.6 and specifications: the X870 Pro RS WiFi comes with an 802.11be Wi-Fi 7 and BT module in the Key E socket.

Wi-Fi standard

Wi-Fi 6E1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 802.11axe Wi-Fi 6E module, IEEE 802.11a/b/g/n/ac/ax/axe, dual-band 2x2 with extended 6GHz band support.

Wi-Fi 71Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 802.11be 2x2 Wi-Fi 7 module, IEEE 802.11a/b/g/n/ac/ax/axe/be.

Wi-Fi bandsiBands the installed module supports.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The module has an extended 6GHz band and the antennas are named ASRock WiFi 2.4/5/6 GHz Antennas. The 6 GHz band depends on Windows 11 and on country rules.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: supports 2.4GHz/5GHz/6GHz frequency band. The 6 GHz band depends on Windows 11 and on country rules.

Max Wi-Fi channel widthiWidest channel the installed module supports, e.g. 320 or 160. It follows the Wi-Fi module, so a board revision can change it.

Not available

160MHz1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: supports 160MHz channel bandwidth with 6GHz frequency band.

Wi-Fi moduleiChip as published. A board revision can change the chip. One name: the maker's when published, otherwise the one name a review uses. No parentheses. Other names go in the source note. Use the chip's part number with its maker when any source gives it, such as Qualcomm QCNCM865 for a module also written NCM865. A platform name such as FastConnect 7800 is used only when no part number is published.

Not available

Not available

BluetoothiVersion of the Bluetooth radio on the Wi-Fi module.

5.21Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications and section 1.6: Bluetooth 5.2.

5.41Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications and section 1.6: Bluetooth 5.4.

Audio

1 of 2 differ

Audio codeciMaker and model, e.g. Realtek ALC4080. A board revision can change the codec.

Realtek ALC8971Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 7.1 CH HD Audio (Realtek ALC897 Audio Codec) with Nahimic Audio.2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Realtek ALC897 audio codec.

Realtek ALC12201Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications: 7.1 CH HD Audio with Content Protection (Realtek ALC1220 Audio Codec) with Nahimic Audio.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Audio is 7.1 channel via a Realtek ALC 1220 chip.

DAC chipiA separate DAC chip next to the codec, e.g. ESS ES9219. Maker plus part number as the maker writes it, with suffix letters, e.g. ESS ES9219Q. A marketing name that stands for a part number is written as the part number, so ESS SABRE9219 is ESS ES9219 and the maker wording goes in the source note. Leave it empty on boards with only a codec.

Not available

Not available

Features

2 of 7 differ

BIOS flashbackiA button that updates the BIOS from a USB drive without a CPU or memory installed. Maker names include BIOS FlashBack, Flash BIOS Button and Q-Flash Plus.

Yes1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 20261 x BIOS Flashback button on the rear panel. Section 2.13 calls it the only smart switch.

Yes1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Specifications list 1 x BIOS Flashback Button on the rear panel. Section 2.13 calls it the only smart switch.

Clear CMOS button (rear)iA button on the rear panel that resets the BIOS settings. A jumper or header does not count. A board whose only clear CMOS button sits on the board itself is false.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The layout lists a Clear CMOS jumper (CLRCMOS1). The only rear panel button is BIOS Flashback.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The rear panel list has no clear CMOS button. The layout lists a Clear CMOS jumper (CLRCMOS1).

POST code displayiA two-digit display that shows boot codes, e.g. ASUS Q-Code or ASRock Dr. Debug. Single status LEDs do not count. Taken from the maker's spec or manual only. A review spec table is not enough.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The layout lists a Post Status Checker (PSC, section 2.14). It is four colour LEDs for CPU, DRAM, VGA and BOOT, not a two-digit display.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 2.14 and the layout list a Post Status Checker (PSC). It is four colour LEDs for CPU, DRAM, VGA and BOOT, not a two-digit display.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026No debug numerical LEDs. A set of debug LEDs sits in the upper right corner.

Power button on the boardiA power or start button on the board itself, for use outside a case. A button with another label counts when the maker says it can turn the PC on, such as GIGABYTE's quick button labelled RESET. A button on the rear I/O panel counts. A button on a module that ships fitted to the board, such as MSI's EZ BRIDGE, counts.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 2.13 says the only smart switch is the BIOS Flashback button. The layout lists no power or reset button.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 2.13 says the only smart switch is the BIOS Flashback button. The layout lists no power or reset button. The FPS Review also says there are no onboard power or reset buttons.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026No onboard power or reset buttons.

Dual BIOSiTwo BIOS chips, so the board can start from the second chip after a failed update. Two flash chips alone do not count.

No1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The block diagram shows one flash ROM. Dual BIOS is not stated.

No1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The block diagram shows one Flash ROM. Dual BIOS is not stated.

Pre-installed I/O shieldiThe rear I/O shield is fixed to the board.

Not available

Yes2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The rear I/O panel is of the style where the rear motherboard plate is preinstalled.9Retailer pagecomputerassistance.co.uk/product/asrock-x870-pro-rs-wifi-amd-am5-socket-motherboard-atx-4x-ddr5-slots-3x-m-2-sockets-fitted-i-o-shield-2-5gbe-lan-wi-fi-7-1x-hdmi-port-2x-usb-c-usb4Read 15 October 2026The title says fitted I/O shield and the spec list says Flexible Integrated I/O Shield.

Tool-free featuresiM.2 latch holds a drive without a screw. M.2 heatsink comes off without a tool. PCIe slot release is a button or lever that frees the graphics card. Push-on antenna connector fits the Wi-Fi antenna without screwing.

Tool-free M.2 latch1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026The install guides for all four M.2 sockets use a nut lock that is turned clockwise to lock a 2280 module in place without a screw. The heatsinks need a screwdriver and are not tool-free. The Wi-Fi antennas screw on. The manual names no PCIe release button.

Tool-free M.2 latch, Tool-free M.2 heatsink1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026The install guides for all three M.2 sockets turn a nut lock clockwise to hold a 2280 module without a screw (m2_latch). The M2_1 heatsink comes off by pushing a button, with no tool (m2_heatsink). The M2_2 and M2_3 heatsinks need a screwdriver. The Wi-Fi antennas screw on. The manual names no PCIe release button, and the FPS Review says the primary slot has no EZ release, although ASRock's launch text for the whole X870 range names an EZ release graphics card slot. The release is left out.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026The primary M.2 (Blazing) heatsink has a quick-release latch, and all M.2 slots have tool-less hold-downs. The bottom M.2 heatsink needs a Phillips screwdriver. The primary PCIe slot is steel-reinforced but has no EZ release.10Reviewsogi.com.tw/talks/%E8%8F%AF%E6%93%8EASRock-X870-PRO-RS-WIFI%E4%B8%BB%E6%A9%9F%E6%9D%BF-%E8%90%AC%E5%85%83%E5%85%A7%E5%84%AA%E8%B3%AA%E9%81%B8/6270854Read 15 October 2026The Blazing M.2 slot has a tool-free install.

Measured

3 of 3 differ

VRM temperature under CPU loadiHighest VRM temperature a reviewer measured during a sustained all-core CPU stress test at stock settings. Compare only results from the same reviewer and CPU. The reviewer's probe reading when given, otherwise the board sensor. The sensor and the CPU package power during the test go in the source note.

65°C3Measurementtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Chart: VRM temperature 65 C. Ryzen 9 9950X at stock, 24 C room temperature, 30 minutes of Cinebench 2024. The test bench also has an Arctic Liquid Freezer II 420 and an RTX 4090. The sensor and the CPU package power are not stated.

35.5°C3Measurementthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Cinebench R23 for 20 minutes with HWInfo64. The CPU was an AMD Ryzen 7 7700X cooled by an AIO, at about 92 C at 100% load. The VRM temperature stayed between 34.0 and 35.5 C and the highest value is stored. The sensor is HWInfo64's reading of the board sensor. The CPU package power and ambient temperature are not stated.

Power draw idleiWhole test system at the wall at idle, measured by a reviewer. Compare only results from the same reviewer and CPU. A chart of CPU and board power without a wall meter does not count.

105W3Measurementtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Chart: idle 105 W with the same Ryzen 9 9950X system. The text calls it power consumption and does not name the meter. The method is not stated, so this is read as whole system power.

Not available

Power draw CPU stressiWhole test system at the wall at the peak of a CPU stress test, measured by a reviewer. The graphics card is not loaded. Compare only results from the same reviewer and CPU. A chart of CPU and board power without a wall meter does not count.

370W3Measurementtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Chart: load 370 W, and the text says full load, with the same system. The stress test, the meter and whether the graphics card was loaded are not stated.

Not available

In the box

1 of 1 differ

In the boxiItems as the maker lists them.

2 x Serial ATA (SATA) data cables, 2 x ASRock WiFi 2.4/5/6 GHz antennas, Quick Installation Guide, Regulatory Notice1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 1.1: 2 x Serial ATA (SATA) data cables (optional) and 2 x ASRock WiFi 2.4/5/6 GHz antennas (optional) for the WiFi model. Tech4Gamers adds a Quick Installation Guide and a Regulatory Notice.2Reviewtech4gamers.com/asrock-b850-pro-rs-wifi-reviewRead 15 October 2026Accessories: two SATA cables, two ASRock WiFi 2.4/5/6 GHz antennas, Quick Installation Guide and Regulatory Notice.

2 x Serial ATA (SATA) data cables, 2 x ASRock WiFi 2.4/5/6 GHz antennas, Quick Start Guide1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026Section 1.1: 2 x Serial ATA (SATA) data cables (optional) and 2 x ASRock WiFi 2.4/5/6 GHz antennas (optional) for the X870 Pro RS WiFi. The FPS Review adds a Quick Start Guide.2Reviewthefpsreview.com/2024/10/28/asrock-x870-pro-rs-wifi-motherboard-reviewRead 15 October 2026Packaging: a bag of two SATA cables, a Quick Start Guide and two Wi-Fi antennas.

Links

Not compared

Product page

www.asrock.com/mb/AMD/B850%20Pro%20RS%20WiFi/index.asp11Maker product pageasrock.com/mb/AMD/B850%20Pro%20RS%20WiFi/index.aspRead 15 October 2026The link comes from web search results for this model. asrock.com answers agents with a bot check, so the page was not read and its content is not used for any value.

www.asrock.com/mb/AMD/X870%20Pro%20RS%20WiFi/index.asp12Maker product pageasrock.com/mb/AMD/X870%20Pro%20RS%20WiFi/index.aspRead 15 October 2026The link is ASRock's product page from the picked list. asrock.com answers agents with a bot check, so the page was not read and its content is not used for any value.

Spec sheet

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Manual

download.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdf1Owner's manualdownload.asrock.com/Manual/B850%20Pro%20RS%20WiFi.pdfRead 15 October 2026ASRock manual for B850 Pro RS WiFi and B850 Pro RS on download.asrock.com, 78 pages. The same file opens under the name B850 Pro RS.pdf. This record uses the WiFi parts only.

download.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdf1Owner's manualdownload.asrock.com/Manual/X870%20Pro%20RS%20WiFi.pdfRead 15 October 2026ASRock manual for X870 Pro RS WiFi and X870 Pro RS, version 1.0 published August 2024, 77 pages, from download.asrock.com. This record uses the WiFi parts only. The same file is mirrored on regard.ru.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years5Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-asrock-amd-am5-b850-pro-rs-wifi-1425695Read 15 October 2026Warranty (months) 36. The market is Estonia.

3years6Retailer pagetest-b2b.100mega.com/en/311835-asrock-x870-pro-rs-wifiRead 15 October 2026Warranty 36 months. A distributor's listing, market not stated.7Retailer pagearvutitark.ee/en/pc-components/motherboards/plyta-glowna-asrock-x870-pro-rs-wifi-1402664Read 15 October 2026Warranty (months) 36. The market is Estonia.

Both are also in the API. Back to all motherboards.