Motherboards / Compare

ASUS TUF GAMING B850M-E WIFI vs GIGABYTE B550M K

A

Product A: ASUS

TUF GAMING B850M-E WIFI

59 of 78 known

Change ASUS TUF GAMING B850M-E WIFI

Compare the GIGABYTE B550M K with

Search motherboards

B

Product B: GIGABYTE

B550M K

49 of 78 known

Change GIGABYTE B550M K

Compare the ASUS TUF GAMING B850M-E WIFI with

Search motherboards

All 78 fields

Every value links to where we found it.

Only differences

AASUS TUF GAMING B850M-E WIFI

BGIGABYTE B550M K

General

2 of 9 differ

Series

TUF Gaming2Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026TUF Gaming is the ASUS line in the product name.

Not available

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

TUF GAMING B850M-E WIFI, 90MB1LS0-M0EAY0, 90MB1LS0-MUVAY0, 90MB1LS0-MVAAY04Maker product pageasus.com/us/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/where-to-buyRead 14 October 2026ASUS US where-to-buy page lists TUF GAMING B850M-E WIFI (90MB1LS0-MUVAY0) and TUF GAMING B850M-E WIFI (90MB1LS0-MVAAY0). European retailers list 90MB1LS0-M0EAY0. The page does not say how the three codes differ.6Retailer pageshop.sumillion.com/asus-tuf-gaming-b850m-e-wifi-amd-b850-socket-am5-micro-atx-90mb1ls0-m0eay0.htmlRead 14 October 2026Part number 90MB1LS0-M0EAY0 in the title.

B550M K1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The manual cover names the model B550M K. The product page lists revisions 1.0, 1.1 and 1.2 under the same name.

GTIN / EAN

47116360684996Retailer pageshop.sumillion.com/asus-tuf-gaming-b850m-e-wifi-amd-b850-socket-am5-micro-atx-90mb1ls0-m0eay0.htmlRead 14 October 2026Sumillion lists EAN 4711636068499 for 90MB1LS0-M0EAY0. comparateur-gamer.fr lists the same EAN and part number.7Retailer pagecomparateur-gamer.fr/prix/asus-tuf-gaming-b850m-e-wifi-4711636068499Read 14 October 2026Price comparison page for EAN 4711636068499 and reference 90MB1LS0-M0EAY0.

4719331852764, 8895230360064Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026Product data sheet for the part B550M K, publication date 24-SEP-2024, barcodes 4719331852764 and 889523036006. Amazon and BuildCores list the same UPC, and several retailers list the same EAN.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026Item details: UPC 889523036006.8Spec databasebuildcores.com/products/Motherboard/x8q2g3bog/Gigabyte-B550M-K-AM4-DDR4-Micro-ATXRead 15 October 2026UPC 889523036006 and EAN 4719331852764. BuildCores also lists EANs 4719331880811 and 4719331805654, which no other source confirms, so they are not stored.

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

Not available

Not available

Status

Available9Retailer pagemaxmybuild.com/motherboards/asus-tuf-gaming-b850m-e-wifiRead 14 October 2026Lists the board with current prices at Amazon and Newegg on 2026-10-14.

Available5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The page showed the board In Stock on 2026-10-15. Best Sellers Rank was 18 in Computer Motherboards.

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.

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

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.

Gaming1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The page sits in the ASUS TUF Gaming family under the ASUS Gaming menu.

Mainstream4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026The data sheet title names no gaming or creator use. Its tagline reads AMD B550 Ultra Durable. The board is not in a GIGABYTE AORUS, GAMING or EAGLE line, so it is stored as mainstream.

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

3 of 4 differ

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

AM51Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

AM41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: AMD Socket AM4.

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 B8501Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

AMD B5501Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: Chipset AMD B550.

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 Series1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026AM5 for Ryzen 9000, 8000 and 7000 Series. The page refers to the ASUS download center for the CPU support list. Read on 2026-10-14.

AMD Ryzen 5000 Series, AMD Ryzen 5000 G-Series, AMD Ryzen 4000 G-Series, AMD Ryzen 3000 Series1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 lists AMD Ryzen 5000 G-Series, 5000 Series, 4000 G-Series and 3000 Series Processors and refers to GIGABYTE's website for the latest CPU support list. The Rev. 1102 manual adds Ryzen 3000 G-Series, which LDLC says rev. 1.0 boards do not support (3200G and 3400G), so only the four series both manuals list are stored. The list was read on 2026-10-15.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026GIGABYTE User's Manual Rev. 1102, copyright 2026, for B550M K WIFI6E and B550M K, linked from a Russian retailer's page for rev. 1.2. Section 2-2 lists Ryzen 5000 G-Series, 5000, 4000 G-Series, 3000 G-Series and 3000 Series. The four series that rev. 1.0 also lists are stored.

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

Yes2Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026The page describes Dynamic OC Switcher, which switches between a manual overclock and Precision Boost Overdrive, and Core Flex for CPU power and thermal limits. AMD's chipset page also lists CPU overclocking for B850.10Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 14 October 2026AMD's chipset page lists enhanced overclocking capabilities for B850 and Ryzen processor overclocking enabled. This is the chip maker's page, not the board maker's.

Yes6Maker product pageamd.com/en/products/processors/chipsets/am4.htmlRead 15 October 2026AMD's AM4 chipset specifications table, B550 row: Overclocking Enabled: Yes. This is the chipset maker's feature, not a board spec. The board's BIOS options were not checked.

Board

2 of 5 differ

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

Micro-ATX1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

Micro-ATX1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: Micro ATX Form Factor, 24.4cm x 24.4cm.

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.

Width244Height244mm(9.6 × 9.6 in)1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026micro-ATX form factor, 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm).

Width244Height244mm(9.6 × 9.6 in)1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 24.4cm x 24.4cm, stored as 244 mm by 244 mm.

PCB layersiCopper layers in the circuit board as published.

82Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026Overview page: Eight Layered PCB design.

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.

No3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026The chapter 1 layout shows the usual front-side power, fan and USB connectors. The board is not a back-connect design.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The section 1-1 layout and the section 2-7 connector list show the usual front-side power, fan and USB connectors.

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.

Not available

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete Specifications list names no lighting on the board and no LED feature. The internal connector list has no RGB or ARGB header.

Power delivery

4 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.

8+2+12Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 20268(80A)+2(80A)+1(80A) power stages with high-side and low-side MOSFETs and drivers in one package (DrMOS). Some retailer copies say 12+2+1. The maker's figure is used.

3+35Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The GIGABYTE-branded listing says Digital 3+3 VRM Design in its bullets and 3+3 Power Phase in its title. GIGABYTE's own specification page and manuals give no phase count. A 4+3 count in an unreliable review and a 5+3 count on one retailer page disagree. The board photo on this page shows six output chokes beside the CPU socket, so the phases may be doubled and no Vcore stage count is stored.

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.

82Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 20268 Vcore power stages of 80 A, DrMOS.

Not available

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.

80A2Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026The overview page says the packages are rated for up to 80A each.

Not available

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

Not available

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

8+4 pin1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Internal connectors: 1 x 8-pin +12V CPU power connector, 1 x 4-pin +12V CPU power connector and the 24-pin main power connector. The manual says to connect the 8-pin plug, or both the 8-pin and 4-pin plugs.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Layout: CPU_12V_1 and CPU_12V_2. Caution: connect the 8-pin power plug, or both the 8-pin and 4-pin plugs.

8 pin1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 Internal Connectors: 1 x 24-pin ATX main power connector and 1 x 8-pin ATX 12V 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.

No1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The internal connector list has no extra slot power connector.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has only the 24-pin and 8-pin ATX 12V connectors, so there is no extra slot power connector.

Memory

3 of 6 differ

Memory type

DDR51Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

DDR41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x DDR4 DIMM sockets.

Memory slotsiDIMM slots on the board.

41Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x DDR4 DIMM sockets.

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.

256GB1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

128GB1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: up to 128 GB (32 GB single DIMM capacity) of system memory.

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/s1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Up to 8000+MT/s (OC) with Ryzen 9000, 8000 and 7000 Series. The Ryzen 9000 value is stored. The page says supported speeds and module counts vary with the CPU and memory configuration.

4,733MT/s3Maker product pagegigabyte.com/Motherboard/B550M-K-rev-10/spRead 15 October 2026The search excerpt of the specification page lists DDR4 4733 (O.C.) as the top memory speed and 3200, 2933, 2667, 2400 and 2133 for plain modules. Ryzen 5000 is the newest processor family the board lists. The manuals list only the plain speeds up to 3200, so the product page is used, as the field rule says.4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026Supported memory clock speed (max) 4733 MHz, with the list 2133 up to 4733 MHz. It is the data rate in MT/s.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026The listing's GIGABYTE infographic says DDR4 Overclocking up to 4733 MT/s.7Spec databasegeizhals.at/gigabyte-b550m-k-a2901610.htmlRead 15 October 2026RAM-Datenrate row: DDR4-3200 for Ryzen 3000 to 5000 and max. DDR4-4733 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.

Yes1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The page says ECC and non-ECC unbuffered DIMM. The maker does not say how ECC works with each CPU. Non-ECC DDR5 has on-die ECC, which does not count.

Yes1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 lists support for ECC Un-buffered DIMM 1Rx8/2Rx8 and non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 modules with no non-ECC mode qualifier. GIGABYTE's product page says ECC support varies by CPU, which still counts as true.

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

2 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.

AASUS TUF GAMING B850M-E WIFI

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

Source1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Ryzen 9000 and 7000: 1 x PCIe 5.0 x16 slot. Ryzen 8000: 1 x PCIe 4.0 x16 slot at x8 or x4. B850 chipset: 1 x PCIe 4.0 x1 slot. The manual calls the slots PCIEX16(G5) and PCIEX1(G4).3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Layout and expansion slot section: one PCIe x16 slot PCIEX16(G5) and one PCIe x1 slot PCIEX1(G4).

BGIGABYTE B550M K

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

Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 with Ryzen 5000 and 3000: 1 x PCI Express x16 slot from the CPU at PCIe 4.0 x16 (PCIe 3.0 x16 with Ryzen 5000 G-Series and 4000 G-Series) and 1 x PCI Express x1 slot from the chipset at PCIe 3.0 x1.

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

1=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

3 of 4 differ

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.

AASUS TUF GAMING B850M-E WIFI

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives
M.2_1	5	4	CPU	M.2 2280	No
M.2_2	4	4	CPU	M.2 2280	No
M.2_3	4	4	Chipset	M.2 2280	No

Source1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Key M slots. Ryzen 9000 and 7000: M.2_1 is type 2280 at PCIe 5.0 x4 and M.2_2 is type 2280 at PCIe 4.0 x4. Ryzen 8000: M.2_1 runs PCIe 4.0 x4 and M.2_2 runs PCIe 4.0 x4 or x2. B850 chipset: M.2_3 is type 2242/2260/2280 at PCIe 4.0 x4, stored as 2280. Heatsinks per slot are not stored. The page lists only PCIe modes for the slots, so sata is false. The specification list and the layout name one M.2 heatsink, while the overview page text says all three M.2 slots have dedicated heatsinks, so the maker's pages conflict.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Chapter 1 item 6 lists the M.2 types and PCIe modes per CPU family. M.2_1, M.2_2 and M.2_3 are installed with the M.2 Q-Latch. The M.2 steps say to follow the heatsink steps only if the slot comes with a heatsink.

BGIGABYTE B550M K

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink
M2A_CPU	4	4	CPU	M.2 2280	Yes	No
M2B_SB	3	2	Chipset	M.2 2280	No	No

Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 with Ryzen 5000 and 3000. M2A_CPU is from the CPU, type 2280, SATA and PCIe 4.0 x4/x2 SSDs (PCIe 3.0 with 5000 G-Series and 4000 G-Series). M2B_SB is from the chipset, type 2280, PCIe 3.0 x2 SSDs, with no SATA mode listed. Section 2-7 item 6 shows both slots held by a clip and no heatsink. No lane sharing is stated.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 2-2 gives the same M2A_CPU and M2B_SB slots, types and speeds as the Rev. 1001 manual.

M.2 slots

3=CalculatedFrom M.2 storage slots

2=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.

41Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 20264 x SATA 6Gb/s ports.

41Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 4 x SATA 6Gb/s connectors from the chipset.

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.

AASUS TUF GAMING B850M-E WIFI

Type	Version	Count	Max link rate (Gbps)
USB-C	USB 3.2 Gen 2	1	10
USB-A	USB 3.2 Gen 2	1	10
USB-A	USB 3.2 Gen 1	2	5
USB-A	USB 2.0	4	0.48
DisplayPort	DisplayPort 1.4	2	Not available
HDMI	HDMI 2.1	1	Not available
Ethernet (RJ45)	Not available	1	2.5
3.5 mm audio	Not available	3	Not available
PS/2	Not available	1	Not available

Source1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Back panel list: 2 USB 10Gbps ports (1 Type-A and 1 Type-C), 2 USB 5Gbps Type-A, 4 USB 2.0 Type-A, 2 DisplayPort (max 8K@30Hz as specified in DisplayPort 1.4), 1 HDMI (4K@60Hz as specified in HDMI 2.1), 1 Wi-Fi module, 1 Realtek 2.5Gb Ethernet port, 3 audio jacks, 1 BIOS FlashBack button and 1 PS/2 keyboard/mouse combo port. ASUS names USB by speed, so 10Gbps is stored as USB 3.2 Gen 2 and 5Gbps as USB 3.2 Gen 1. The page does not state DisplayPort Alt Mode for the Type-C port.

BGIGABYTE B550M K

Type	Version	Count	Max link rate (Gbps)
USB-A	USB 3.2 Gen 1	4	5
USB-A	USB 2.0	4	0.48
DisplayPort	DisplayPort 1.4	1	Not available
HDMI	HDMI 2.1	1	Not available
Ethernet (RJ45)	Not available	1	1
3.5 mm audio	Not available	3	Not available
PS/2	Not available	1	Not available

Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 Back Panel Connectors: 1 x PS/2 keyboard/mouse port, 1 x DisplayPort, 1 x HDMI port, 4 x USB 3.2 Gen 1 ports, 4 x USB 2.0/1.1 ports, 1 x RJ-45 port and 3 x audio jacks. The list has no button and no optical S/PDIF port. LAN is 1 Gbps. DisplayPort 1.4 (5120x2880 at 60 Hz) and HDMI 2.1 (4096x2160 at 60 Hz) work only with Ryzen 5000 G-Series and 4000 G-Series processors, which have integrated graphics.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 2-2 gives the same back panel list as the Rev. 1001 manual. Its LAN line adds 10 Mbps to 1 Gbps and 100 Mbps.

Rear USB ports

8=CalculatedFrom Rear ports

8=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

1=CalculatedFrom Rear ports

0=CalculatedFrom Rear ports

Fastest rear USB port

10Gbps=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

4 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.

AASUS TUF GAMING B850M-E WIFI

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

Source1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 20261 x USB 5Gbps connector (supports USB Type-C), 1 x USB 5Gbps header for 2 additional ports and 2 x USB 2.0 headers for 4 additional ports.

BGIGABYTE B550M K

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

Source1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: 1 x USB 3.2 Gen 1 header and 1 x USB 2.0/1.1 header. Section 2-7 items 9 and 10: each header serves two ports through an optional bracket. No front USB-C header and no USB power output is stated.

Front USB-C header speed

5Gbps=CalculatedFrom Internal USB headers

Not available

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.

51Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 20261 CPU fan, 1 CPU OPT fan, 1 AIO pump and 2 chassis fan headers, all 4-pin.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Table of fan and pump headers: CPU_FAN, CPU_OPT, CHA_FAN1, CHA_FAN2 and AIO_PUMP, 1 A each.

21Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2 Internal Connectors: 1 x CPU fan header and 1 x system fan header, both 4-pin.

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.

31Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 20263 x Addressable RGB Gen 2 headers.

01Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has no ARGB header.

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.

01Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The internal connector list has 3 Addressable Gen 2 headers and no 12 V RGB header.

01Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The complete internal connector list has no RGB header.

Networking

7 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 RTL81255Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/helpdesk_downloadRead 14 October 2026Driver list: Realtek RTL8125 LAN driver and Realtek RTL8125D LAN driver. The chip is stored as the family RTL8125. The spec page says Realtek 2.5Gb Ethernet.

Not available

Ethernet ports

1=CalculatedFrom Rear ports

1=CalculatedFrom Rear ports

Ethernet speediFastest Ethernet port.

2.5Gbps=CalculatedFrom Rear ports

1Gbps=CalculatedFrom Rear ports

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

Yes1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The back panel list has 1 Wi-Fi module.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The Specifications list has no Wireless section and the back panel list has no antenna connectors. The newer B550M K WIFI6E is a separate model.

Wi-Fi standard

Wi-Fi 6E1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 20262x2 Wi-Fi 6E (802.11ax).

Not available

Wi-Fi bandsiBands the installed module supports.

2.4 GHz, 5 GHz, 6 GHz1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Supports 2.4/5/6GHz. The 6 GHz band depends on country regulations and needs Windows 11 or later.

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.

MediaTek MT79225Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/helpdesk_downloadRead 14 October 2026Driver list names MediaTek MT7922 WiFi driver and MediaTek MT7922 Bluetooth driver. The spec page names no chip.

Not available

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

5.31Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Bluetooth v5.3. The page says the version may vary and refers to the Wi-Fi module maker.

Not available

Audio

None of 2 known

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

Not available

Not available

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

3 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.

Yes1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026BIOS FlashBack button on the back panel and a BIOS FlashBack LED.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The back panel list has no button. Q-Flash is a BIOS utility and needs a CPU and memory.

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.

No1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The back panel list has only the BIOS FlashBack button. Clear CMOS is a header on the board.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Layout item 13: Clear CMOS header (CLRTC). The rear panel has the BIOS FlashBack button only.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-7 item 13 is the CLR_CMOS jumper. 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.

No1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Q-Design lists Q-LED with four status LEDs (CPU, DRAM, VGA, boot device). No Q-Code display is listed.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Layout item 17: Q-LEDs (CPU, DRAM, VGA and boot device). No two-digit display on the layout.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The specifications and connector list name no 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.

No1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026The internal connector list names a front panel system header and no power or start button on the board.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026The layout lists the F_PANEL header with a PWR_BTN pin for a chassis button and no power or start button on the board.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026The internal connector list and the section 1-1 layout name no power or start 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.

No1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026BIOS is a single 256 Mb flash ROM. Dual BIOS is not stated.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Specifications summary: 256 Mb Flash ROM, UEFI AMI BIOS. Dual BIOS is not stated.

No1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-2: BIOS is 1 x 128 Mbit flash with a licensed AMI UEFI BIOS. Dual BIOS is not named.

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

Yes1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026EZ DIY list: Pre-mounted I/O shield.

Not available

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 latch, PCIe slot release, Push-on antenna connector1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026ASUS Q-Design: M.2 Q-Latch, PCIe Slot Q-Release and Q-Antenna.2Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026PCIe Slot Q-Release lever, Q-Antenna snap-in Wi-Fi antenna and M.2 Q-Latch are described on the page.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026M.2 Q-Latch secures M.2 modules in the installation steps. The ASUS WiFi Q-Antenna chapter describes the snap-in antenna.

Tool-free M.2 latch1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 2-7 item 6: pull the clip's tab out of the mounting hole, slide the M.2 SSD in, press it down and press the clip's tab into the mounting hole. No screw is used.

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.

2 x SATA 6Gb/s cables, 1 x ASUS WiFi Q-Antenna, 1 x TUF Gaming sticker, 1 x M.2 rubber package, 1 x Screw package for M.2 SSD, 1 x Quick start guide1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026Accessories list on the specification page, the same as the manual's package contents.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026Package contents list on page 8.

SATA cable, User's Manual, I/O Shield1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026Section 1-2 box contents: B550M K motherboard, User's Manual, One SATA cable, I/O Shield, for reference only. The Rev. 1102 manual lists Two SATA cables, so the SATA cable count is not stored.2Owner's manualregard.ru/api/site/files/goodspdf/download/30802Read 15 October 2026Section 1-2: B550M K WIFI6E or B550M K motherboard, User's Manual, I/O Shield, Two SATA cables and One antenna (WIFI6E only). The older Rev. 1001 manual says One SATA cable.

Links

Not compared

Product page

www.asus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi2Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifiRead 14 October 2026

www.gigabyte.com/Motherboard/B550M-K-rev-103Maker product pagegigabyte.com/Motherboard/B550M-K-rev-10/spRead 15 October 2026GIGABYTE product page for B550M K rev. 1.0. Revisions 1.1 and 1.2 have their own pages with the same name.

Spec sheet

www.asus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspec1Maker product pageasus.com/motherboards-components/motherboards/tuf-gaming/tuf-gaming-b850m-e-wifi/techspecRead 14 October 2026

www.gigabyte.com/Motherboard/B550M-K-rev-10/sp3Maker product pagegigabyte.com/Motherboard/B550M-K-rev-10/spRead 15 October 2026The /sp page is GIGABYTE's specification page. It was read through a web search excerpt only.

Manual

dlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdf3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/TUF_GAMING_B850M-E_WIFI/E26935_TUF_GAMING_B850M-E_WIFI_EM_V2_WEB.pdfRead 14 October 2026ASUS user's manual E26935, English edition, revision V2, 2025-08-11 on the ASUS support site.

www.trovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdf1Owner's manualtrovaprezzi.it/manuali/gigabyte_b550m_k_1_0.pdfRead 15 October 2026GIGABYTE B550M K User's Manual Rev. 1001, copyright 2023, 29 pages, hosted by trovaprezzi.it. It is the manual for rev. 1.0. A newer GIGABYTE manual, Rev. 1102 from 2026, covers B550M K and B550M K WIFI6E and is listed below.

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.

3years8Retailer pagearvutitark.ee/en/pc-components/motherboards/mb-amd-b850-sam5-atxtuf-gaming-b850m-e-wifi-asus-1465160Read 14 October 2026Arvutitark is an Estonian shop and lists a warranty of 36 months for product code 90MB1LS0-M0EAY0. It is the shop's stated warranty and not an ASUS page.

3years4Retailer pageik.imagekit.io/pimberly/65707b38e31f5a94719d7ba0/4a6bea2c/66f2e2428f76e40019820f68/product-pdfRead 15 October 2026The data sheet from a European distributor feed gives Warranty period 3 year(s). The market is Europe. Amazon US says 3 Years Manufacturer.5Retailer pageamazon.com/dp/B0BTTZFQTPRead 15 October 2026Warranty Description: 3 Years Manufacturer, on the US page.7Spec databasegeizhals.at/gigabyte-b550m-k-a2901610.htmlRead 15 October 2026Garantie row: 3 Jahre. The market is Austria.

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