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ASRock B850M-X R2.0 vs MSI PRO A620AM-B EVO

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Product A: ASRock

B850M-X R2.0

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B

Product B: MSI

PRO A620AM-B EVO

55 of 78 known

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Only differences

AASRock B850M-X R2.0

BMSI PRO A620AM-B EVO

General

1 of 9 differ

Series

Not available

PRO1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The manual cover reads PRO Series Motherboard PRO A620AM-B EVO.

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

B850M-X R2.0, 90-MXBSG0-A0UAYZ1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Cover and chapter 1 name the B850M-X R2.0. The part number 90-MXBSG0-A0UAYZ is on BuildCores, Paradigit and ComputerG. The Wi-Fi board is a separate model, 90-MXBSH0-A0UAYZ.4Retailer pageparadigit.ie/asrock-b850m-x-r2-0/21812982/productRead 15 October 2026Manufacturer part number 90-MXBSG0-A0UAYZ. The page lists 3 M.2 slots in its highlights and 1 in its table, which fits neither the manual nor the maker's text, so it is not used for slots.6Retailer pagecomputerg.shop/it/shop/asrock-b850m-x-r2-0-b850-am5-90-mxbsg0-a0uayz-42489Read 15 October 2026Part number 90-MXBSG0-A0UAYZ.7Spec databasebuildcores.com/products/Motherboard/4aue7wofw/ASRock-B850-M-X-R2.0-DDR5-Micro-ATXRead 15 October 2026Retailer part number 90-MXBSG0-A0UAYZ. The page also shows a UPC 4711581490765 that other shops attach to the Wi-Fi board, so it is not stored. Its Wi-Fi 6E row also belongs to the Wi-Fi board.

PRO A620AM-B EVO, 7E36-001R, 911-7E36-0013Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026Manufacturer part number 7E36-001R. Shops give the same board as 911-7E36-001.4Retailer pagescan.co.uk/products/msi-pro-a620am-b-evo-amd-a620a-am5-ddr5-pcie-40-1x-m2-25gbe-usb-32-gen1-amd-expo-matxRead 15 October 2026Model number PRO A620AM-B EVO.7Spec databasepcpartpicker.com/product/9vh2FT/msi-pro-a620am-b-evo-micro-atx-am5-motherboard-pro-a620am-b-evoRead 15 October 2026Part numbers: PRO A620AM-B EVO, 7E36-001R, 911-7E36-001.

GTIN / EAN

47115814907582Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Shop feed barcode 4711581490758 for SKU B850M-X R2.0. The Wi-Fi board has 4711581490765.5Retailer pageox.ee/en/product/3162912Read 15 October 2026EAN 4711581490758. The Computer Orbit feed and the ComputerG listing show the same number.6Retailer pagecomputerg.shop/it/shop/asrock-b850m-x-r2-0-b850-am5-90-mxbsg0-a0uayz-42489Read 15 October 2026Barcode 4711581490758.

47113773972164Retailer pagescan.co.uk/products/msi-pro-a620am-b-evo-amd-a620a-am5-ddr5-pcie-40-1x-m2-25gbe-usb-32-gen1-amd-expo-matxRead 15 October 2026GTIN 4711377397216. Caseking and AWD-IT give the same EAN.6Retailer pageawd-it.co.uk/msi-pro-a620am-b-evo-micro-atx-amd-ryzen-ddr5-motherboard-socket-am5.htmlRead 15 October 2026EAN 4711377397216.

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

Not available

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Status

Available2Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Listed as available on 2026-10-15.

Available3Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026Listed with offers from several shops on 2026-10-15.4Retailer pagescan.co.uk/products/msi-pro-a620am-b-evo-amd-a620a-am5-ddr5-pcie-40-1x-m2-25gbe-usb-32-gen1-amd-expo-matxRead 15 October 2026On sale with stock listed on 2026-10-15. Its memory row reads DDR5-7600 (OC), which no other source repeats and is not used.

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

Not available

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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.

Not available

Not available

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

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ColoursiThe maker's own colour names

Not available

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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.

Mainstream2Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026ASRock text: a high-value X-Series board for everything from professional productivity to everyday use. It is not in the Phantom Gaming, Steel Legend or Taichi lines.

Mainstream1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026MSI PRO is a mainstream line, not gaming, creator or workstation.

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

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Platform

2 of 4 differ

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

AM51Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026

AM51Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: processor 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/B850M-X%20R2.0.pdfRead 15 October 2026

AMD A620A1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: AMD A620A chipset.

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors. Slot availability depends on the CPU. Read on 2026-10-15.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: supports AMD Ryzen 9000, 8000 and 7000 Series desktop processors, processor socket AM5. The manual points to msi.com for the newest support status. Read on 2026-10-15.

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

Yes9Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 15 October 2026AMD's chipset page describes the B850 platform with enhanced overclocking capabilities. The page timed out when opened, so the text was read in a search result. This is the chip maker's page, not the board maker's. The ASRock manual carries an overclocking warning and names Untied Overclocking Technology.

No8Press articlenoobfeed.com/hardware/amd-am5-chipsets-x870-b850-b840-a620-comparisonRead 15 October 2026The article says CPU overclocking is available on all AM5 chipsets except B840 and A620, and that A620 lacks PBO. It does not name A620A. The MSI manual lists memory overclocking and AMD EXPO only. Memory overclocking alone does not count.

Board

2 of 5 differ

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

Micro-ATX1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: Micro ATX Form Factor.

Micro-ATX1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: m-ATX form factor, 8.5 in. x 9.6 in. (218 mm x 244 mm).

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.

Width226Height244mm(8.9 × 9.6 in)2Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Shop copy of ASRock's spec: Micro ATX Form Factor 9.6-in x 8.9-in, 24.4 cm x 22.6 cm. The 244 mm side runs along the rear I/O edge, as the field help says for Micro ATX, so it is stored as the height. The shorter 226 mm side is the width.3Retailer pageavadirect.com/B850M-X-R2-0-AMD-B850-Chipset-AM5-microATX-Motherboard/Product/19612206Read 15 October 2026Spec text: Micro ATX Form Factor 9.6-in x 8.9-in, 24.4 cm x 22.6 cm.4Retailer pageparadigit.ie/asrock-b850m-x-r2-0/21812982/productRead 15 October 2026Width 244 mm and depth 226 mm in the spec table. The shop calls the longer side the width. It runs along the rear I/O edge.6Retailer pagecomputerg.shop/it/shop/asrock-b850m-x-r2-0-b850-am5-90-mxbsg0-a0uayz-42489Read 15 October 2026Width 244 mm and depth 226 mm. The shop calls the longer side the width.8Press articlegdm.or.jp/crew/2025/0404/581769Read 15 October 2026Micro-ATX (244 x 226 mm), for the Wi-Fi board.

Width218Height244mm(8.6 × 9.6 in)1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 218 mm x 244 mm. Retailers give 218 x 243.84 mm, which is 9.6 in exactly.

PCB layersiCopper layers in the circuit board as published.

62Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Shop copy of ASRock's text: the 6 Layer PCB provides stable signal traces and power shapes.4Retailer pageparadigit.ie/asrock-b850m-x-r2-0/21812982/productRead 15 October 2026Text: the 6 Layer PCB provides stable signal traces and power shapes.

Not available

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/B850M-X%20R2.0.pdfRead 15 October 2026The layout in section 1.3 shows the usual front-side power, fan and USB connectors. It is not a back-connect board.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The Overview of Components pages show the usual front-side connectors. PCPartPicker also says no back-connect connectors.7Spec databasepcpartpicker.com/product/9vh2FT/msi-pro-a620am-b-evo-micro-atx-am5-motherboard-pro-a620am-b-evoRead 15 October 2026Uses Back-Connect Connectors: No.

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.

No2Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026The text names only onboard RGB and addressable RGB headers for external devices. It names no lighting on the board.7Spec databasebuildcores.com/products/Motherboard/4aue7wofw/ASRock-B850-M-X-R2.0-DDR5-Micro-ATXRead 15 October 2026Lighting: None. The headers are for external devices.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The LED Features list has only the RGB and ARGB headers, 4 EZ Debug LEDs and 1 EZ Memory Detection LED. No on-board lighting is named.

Power delivery

2 of 6 differ

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.

6+1+12Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Shop copy of ASRock's product page: 6+1+1 Phase Power Design, Dr.MOS for VCore. The page gives no current rating and no controller.3Retailer pageavadirect.com/B850M-X-R2-0-AMD-B850-Chipset-AM5-microATX-Motherboard/Product/19612206Read 15 October 2026Spec text: 6+1+1 Phase Power Design, Dr.MOS for VCore.8Press articlegdm.or.jp/crew/2025/0404/581769Read 15 October 20266+1+1 phases, Dr.MOS for VCore, for the Wi-Fi board.

Not available

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.

62Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026The first number of 6+1+1 is the Vcore rail, built with Dr.MOS power stages.

63Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026VRM row: 6+2 with 6x 50 A SM4377 high-side and 12x SM4503 low-side MOSFETs for VCORE, so 6 stages. Geizhals counts 5 real CPU phases (3+2) and 8 virtual (2x3+2). MSI publishes no layout. One search excerpt of an Amazon listing says 6+2+1, but that listing also claims two M.2 slots and two USB-C ports, which the manual does not show, so it was not used and the layout string is left out.

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.

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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 RT3674AE3Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026PWM controller row: RT3674AE (max 6 phases). RT3674 is a Richtek part. No review of this board names a controller, and this is one aggregator.

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

8 pin1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 connector list: 1 x 8 pin 12V power connector (Hi-Density Power Connector), next to the 24 pin ATX connector.

8 pin1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x 24-pin ATX main power connector and 1x 8-pin +12V power connector (CPU_PWR1).

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/B850M-X%20R2.0.pdfRead 15 October 2026The connector list has no extra slot power connector. The manual never states that one is absent.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The power connector list has only the 24-pin and 8-pin connectors.

Memory

3 of 6 differ

Memory type

DDR51Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: Dual Channel DDR5.

DDR51Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 2x DDR5 memory slots, supporting up to 128GB, dual-channel mode. The manual names AMD POR speed, JEDEC speed, memory overclocking and AMD EXPO but gives no MT/s figures.

Memory slotsiDIMM slots on the board.

21Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 2 x DDR5 DIMM slots (DDR5_A1 and DDR5_B1).

21Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.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.

128GB1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: max. capacity of system memory 128GB.

128GB1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026

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.

8,200MT/s1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: DDR5 ECC/non-ECC un-buffered memory up to 8200+(OC). The manual names no CPU family or module setup. It refers to the Memory Support List on the maker's website.

6,800MT/s3Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026Data rate: DDR5-5200 (Ryzen 7000/8000G), DDR5-5600 (Ryzen 9000), max. DDR5-6800 OC.5Retailer paget-labz.com/product/msi-pro-a620am-b-evo-am5-m-atx-motherboardRead 15 October 2026Copy of MSI's text: DDR5 6800-5600 (OC) MT/s and 5600-4800 (JEDEC) MT/s. 1DPC 1R supports up to 6800+ MT/s and 1DPC 2R up to 6000+ MT/s. No CPU family is named. Ryzen 9000 is the newest family the board is sold for. 6800 is stored for one module per channel. The Amazon title says DDR5 Memory Boost (6800+ MT/s OC) and Geizhals says max. DDR5-6800 OC.

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: supports DDR5 ECC/non-ECC un-buffered memory. The manual does not say whether ECC is active with each CPU. BuildCores also lists ECC support as yes.7Spec databasebuildcores.com/products/Motherboard/4aue7wofw/ASRock-B850-M-X-R2.0-DDR5-Micro-ATXRead 15 October 2026ECC Support: Yes.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: supports non-ECC, un-buffered memory.

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

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: supports CUDIMM, clock driver bypass mode only. CUDIMM support and POR boot frequency may vary by CPU series.

Expansion slots

3 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 B850M-X R2.0

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	4	4	Chipset	1
PCIe x1	1	4	Chipset	1

Source1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 and 1.5: PCIE1 is PCIe 5.0 x16 from the CPU (Gen5 x16 with Ryzen 9000 and 7000, Gen4 x8 with Ryzen 8000 Phoenix 1, Gen4 x4 with Phoenix 2). From the chipset: PCIE2 PCIe 4.0 x1 and PCIE3 a PCIe 4.0 x16 slot that runs at x4. The M.2 Key E socket for a Wi-Fi module is not listed. The board has no Wi-Fi module installed.

BMSI PRO A620AM-B EVO

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	4	CPU	1
PCIe x1	1	3	Chipset	1

Source1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: PCI_E1 is a PCIe x16 slot from the CPU, up to PCIe 4.0 x16 for Ryzen 9000 and 7000 (x8 for Ryzen 8700, 8600 and 8400, x4 for Ryzen 8500 and 8300). PCI_E2 is a PCIe x1 slot from the A620A chipset, up to PCIe 3.0 x1.

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

2=CalculatedFrom Expansion slots

1=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

4=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 B850M-X R2.0

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink
M2_1	5	4	CPU	M.2 2280	No	Yes
M2_2	4	4	CPU	M.2 2280	No	No

Source1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: M2_1 is the Blazing M.2 socket (Key M) for type 2280, PCIe Gen5x4 from the CPU. It runs Gen5x4 with Ryzen 9000 and 7000 and Gen4x4 with Ryzen 8000. M2_2 is the Hyper M.2 socket (Key M) for type 2260 and 2280, PCIe Gen4x4 from the CPU. It runs Gen4x2 with Ryzen 8000 Phoenix 2. 2280 is stored for M2_2. The manual lists both slots with PCIe modes only, so sata is false. The install guides in sections 2.17 and 2.18 show a heatsink to remove on M2_1 and none on M2_2. The manual lists no lane sharing between slots.

BMSI PRO A620AM-B EVO

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink
M2_1	4	4	CPU	M.2 2280	No	No

Source1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x M.2 slot (Key M), M2_1 from the CPU, up to PCIe 4.0 x4 for Ryzen 9000, 8700, 8600, 8400 and 7000 (x2 for Ryzen 8500 and 8300), 2260 and 2280 devices. The list shows no SATA mode. The M2_1 chapter shows an EZ M.2 Clip II and no heatsink. PCPartPicker says two M.2 slots, which the manual and its board diagram do not show.

M.2 slots

2=CalculatedFrom M.2 storage slots

1=CalculatedFrom M.2 storage slots

PCIe 5.0 M.2 slots

1=CalculatedFrom M.2 storage slots

0=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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 4 x SATA3 6.0 Gb/s connectors from the chipset.

21Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 2x SATA 6Gb/s ports from the A620A chipset.

Rear ports

2 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 B850M-X R2.0

Type	Version	Count	Max link rate (Gbps)
USB-C	USB 3.2 Gen 1	1	5
USB-A	USB 3.2 Gen 1	3	5
USB-A	USB 2.0	2	0.48
HDMI	HDMI 2.1	1	Not available
DisplayPort	DisplayPort 1.4	1	Not available
Ethernet (RJ45)	Not available	1	2.5
3.5 mm audio	Not available	3	Not available

Source1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 and 1.4: 1 HDMI (HDMI 2.1 TMDS/FRL 8G compatible, up to 4K 120Hz), 1 DisplayPort 1.4 with DSC, 1 USB 3.2 Gen1 Type-C (5 Gb/s per the block diagram), 3 USB 3.2 Gen1 Type-A, 2 USB 2.0, 1 RJ-45 2.5G LAN and 3 HD audio jacks (Line in, Front Speaker, Microphone). The 2 antenna mounting points, which hold no antenna on this board, and the BIOS Flashback button are not ports.

BMSI PRO A620AM-B EVO

Type	Version	Count	Max link rate (Gbps)
HDMI	HDMI 2.1	1	Not available
VGA	Not available	1	Not available
PS/2	Not available	2	Not available
USB-A	USB 3.2 Gen 1	4	5
USB-A	USB 2.0	2	0.48
Ethernet (RJ45)	Not available	1	2.5
3.5 mm audio	Not available	3	Not available

Source1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter and Back Panel Connectors: 1 HDMI (HDMI 2.1, 4K 60Hz, processors with graphics only), 1 VGA, 1 PS/2 mouse and 1 PS/2 keyboard port, 2 USB 5Gbps Type-A from the CPU, 2 USB 5Gbps Type-A from the chipset, 1 USB 2.0 Type-A from the CPU, 1 USB 2.0 Type-A from the chipset, 1 2.5Gbps LAN (RJ45) and 3 audio jacks. USB 5Gbps is stored as USB 3.2 Gen 1, as Scan and Geizhals write it.

Rear USB ports

6=CalculatedFrom Rear ports

6=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

1=CalculatedFrom Rear ports

0=CalculatedFrom Rear ports

Fastest rear USB port

5Gbps=CalculatedFrom Rear ports

5Gbps=CalculatedFrom Rear ports

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

Not available

Not available

Internal connectors

2 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 B850M-X R2.0

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

Source1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 connector list: 1 front panel Type C USB 3.2 Gen1 header, 1 USB 3.2 Gen1 header for 2 ports and 2 USB 2.0 headers for 4 ports. The manual states no power output for the Type-C header.

BMSI PRO A620AM-B EVO

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

Source1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x USB 5Gbps Type-C connector (JUSBC1), 1x USB 5Gbps Type-A connector (JUSB3, 2 additional ports) and 2x USB 2.0 connectors (JUSB1~2, 4 additional ports).

Front USB-C header speed

5Gbps=CalculatedFrom Internal USB headers

5Gbps=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.

61Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 2 CPU fan connectors, 3 chassis or water pump fan connectors and 1 AIO pump fan connector, all 4-pin.

31Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x 4-pin CPU fan connector and 2x 4-pin system fan connectors.

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 3 x addressable LED headers (5 V, 3 A in total).

11Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x 3-pin ARGB_V2 LED connector (JARGB_V2_1).

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 1 x RGB LED header (12 V, 3 A in total).

11Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x 4-pin RGB LED connector (JRGB1).

Networking

0 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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 2.5 Gigabit LAN, Dragon RTL8125BG. The suffix BG is left out.

Realtek RTL81253Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026LAN chip: Realtek RTL8125BG, 2.5GBase-T. The suffix BG is left out. The manual says Realtek 8125 2.5Gbps LAN controller.

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.

No1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 lists the wireless module only for the B850M-X WiFi R2.0. Section 2.16 is a guide for adding a Wi-Fi module to the B850M-X R2.0, and the rear panel has antenna mounting points instead of antenna ports. So no module is installed.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The Specifications chapter lists no wireless module. Geizhals and LDLC say no Wi-Fi.

Wi-Fi standard

Not available

Not available

Wi-Fi bandsiBands the installed module supports.

Not available

Not available

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

Not available

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.

Not available

Not available

Audio

0 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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2: 7.1 CH HD Audio, Realtek ALC897 Audio Codec.

Realtek ALC8971Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: Realtek ALC897 codec, 7.1-channel High Definition Audio.

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

1 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/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.2 and 2.14: the BIOS Flashback button on the rear panel updates the BIOS without a CPU.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The back panel list has no BIOS flash button.

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/B850M-X%20R2.0.pdfRead 15 October 2026The layout lists a Clear CMOS jumper (CLRCMOS1). The only rear panel button is BIOS Flashback. BuildCores lists Clear CMOS Button: No.7Spec databasebuildcores.com/products/Motherboard/4aue7wofw/ASRock-B850-M-X-R2.0-DDR5-Micro-ATXRead 15 October 2026Clear CMOS Button: No.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x Clear CMOS jumper (JBAT1). The back panel list has no button.

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 2.15: the Post Status Checker is four colour LEDs for CPU, DRAM, VGA and BOOT, not a two-digit display.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026LED Features: 4x EZ Debug LED and 1x EZ Memory Detection LED. These are status LEDs, not a two-digit display.

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/B850M-X%20R2.0.pdfRead 15 October 2026Section 2.14 says the only smart switch is the BIOS Flashback button. The layout lists no power or reset button.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026The component overview lists the front panel connectors JFP1 and JFP2 and no power or reset button on the board.

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/B850M-X%20R2.0.pdfRead 15 October 2026The block diagram shows one flash ROM. Dual BIOS is not stated.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Specifications chapter: 1x 512 Mb flash. Dual BIOS is not stated.

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

No1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.1 package contents lists 1 x I/O Shield as a loose item, and section 2.5 is a guide to installing the I/O panel shield.

No1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Package Contents: 1x IO Shielding, so the shield is loose.

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/B850M-X%20R2.0.pdfRead 15 October 2026The install guides for M2_1 and M2_2 use a nut lock that is turned clockwise to lock a 2280 module in place without a screw. The M2_1 heatsink needs a screwdriver and is not tool-free. The manual names no PCIe release button.

Tool-free M.2 latch1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Package Contents and the M2_1 chapter: EZ M.2 Clip II holds the SSD without a screw and a remover tool is included. The manual names no PCIe release, tool-free M.2 heatsink or push-on antenna connector.

Measured

None of 3 known

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.

Not available

Not available

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.

Not available

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.

Not available

Not available

In the box

1 of 1 differ

In the boxiItems as the maker lists them.

1 x I/O Shield, 2 x Serial ATA (SATA) Data Cables, 1 x Screw for M.2 Socket1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026Section 1.1 package contents: 1 x I/O Shield, 2 x Serial ATA (SATA) Data Cables (Optional) and 1 x Screw for M.2 Socket (Optional) for the B850M-X R2.0, without the board. The two antennas listed are for the Wi-Fi board and are left out.2Retailer pagecomputerorbit.com/products/asrock-b850m-x-r2-0-micro-atx-am5-motherboardRead 15 October 2026Accessories: 1 x I/O Shield, 2 x SATA Data Cables, 1 x Screw for M.2 Socket.

1x Quick installation guide, 1x European Union Regulatory Notices, 1x SATA cable, 1x IO Shielding, 1x EZ M.2 Clip II, 1x EZ M.2 Clip II Remover1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026Package Contents. The motherboard itself is not listed here.

Links

Not compared

Product page

www.asrock.com/MB/AMD/B850M-X%20R2.0/index.asp10Maker product pageasrock.com/MB/AMD/B850M-X%20R2.0/index.aspRead 15 October 2026The page returned a bot check, so it was not read and the check was not worked around. Its address is the one in the job brief. No value comes from it.

www.msi.com/Motherboard/PRO-A620AM-B-EVO2Maker product pagemsi.com/Motherboard/PRO-A620AM-B-EVORead 15 October 2026The URL comes from the job evidence and search results. msi.com blocks agents, so the page was not opened. No spec sheet PDF could be read: the MSI datasheet server returned access denied and no MSI e-shop feed lists the board.

Spec sheet

Not available

Not available

Manual

download.asrock.com/Manual/B850M-X%20R2.0.pdf1Owner's manualdownload.asrock.com/Manual/B850M-X%20R2.0.pdfRead 15 October 2026ASRock manual for the B850M-X WiFi R2.0 and the B850M-X R2.0, 72 pages, Version 1.0, published February 2025. The cover says Micro ATX. Items marked B850M-X WiFi R2.0 are not used. asrock.com sits behind a bot check, so the maker's product page was not opened.

gzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdf1Owner's manualgzhls.at/blob/ldb/c/6/e/6/5208618ab6fcd187518aeea214f1474005fc.pdfRead 15 October 2026MSI User Guide for PRO A620AM-B EVO (59 pages), revision history Version 1.0, 2025/08, first release. It is hosted by Geizhals. A copy on trovaprezzi.it has the same text. msi.com blocks agents, so the maker's own copy was not opened.

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.

Not available

Not available

Warranty

0 of 1 differ

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 pageox.ee/en/product/3162912Read 15 October 2026Warranty: 36 months. The market is Estonia. Arvutitark also lists 36 months.

3years3Spec databasegeizhals.de/msi-pro-a620am-b-evo-7e36-001r-a3650527.htmlRead 15 October 2026Garantie 3 Jahre. The market is Germany.5Retailer paget-labz.com/product/msi-pro-a620am-b-evo-am5-m-atx-motherboardRead 15 October 2026Warranty 36 months. The market is Pakistan.

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