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GIGABYTE B550M K vs Gigabyte A520M K V2

Buy the GIGABYTE B550M K for a Ryzen build that needs two M.2 drives, PCIe 4.0, or more than 64 GB of RAM. Buy the A520M K V2 if you want the cheapest stable board for a single drive and a modest CPU and value the higher rating. The B550M K is $78.98 at Walmart as of November 7, 2026, and the A520M K V2 is $88.90 at Newegg as of the same date, so the better-featured board is currently the cheaper one.

Today the GIGABYTE B550M K costs $9.92 less at its best price.

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GIGABYTE
GIGABYTE B550M K

GIGABYTE B550M K

4.1(170 ratings)
$78.98at WalmartObserved Nov 7, 2026, 11:50 AM
See all prices and details
Visit Walmart

Choose the B550M K if you want PCIe 4.0, dual M.2 slots, four DIMM slots, and a board that can take a Ryzen 7 or 9 without power limits.

Pros
  • Two M.2 slots, both able to run PCIe 4.0 drives
  • PCIe 4.0 x16 slot for current graphics cards
  • Four DIMM slots and 128 GB max capacity
  • Q-Flash Plus updates BIOS without a CPU or RAM installed
  • Cheaper than the A520 board at the listed prices
Cons
  • 3+3 power phase limits it to mid-range CPUs
  • No USB-C on the rear panel
  • Lower rating, 4.1 from 170 ratings
  • Only one store lists it new
Gigabyte
Gigabyte A520M K V2 AMD AM4 Motherboard

Gigabyte A520M K V2

Gigabyte A520M K V2 AMD AM4 Motherboard

4.8(1,200 ratings)
$88.90at NeweggObserved Nov 7, 2026, 1:51 PM
See all prices and details
Visit Newegg

Store links may earn us a commission. Price via Klarna.

Choose the A520M K V2 if you are building a low-cost Ryzen 3 or Ryzen 5 system with one SSD and 16 to 32 GB of RAM and want the higher-rated board.

Pros
  • Higher rating, 4.8 from 1,200 ratings
  • USB-C port on the rear panel
  • Supports M.2 drives in 2242, 2280 and 22110 lengths
  • Simple board with fewer settings to get wrong
Cons
  • A520 chipset caps the graphics slot at PCIe 3.0
  • One M.2 slot only
  • Two DIMM slots, 64 GB maximum
  • Costs more than the B550M K at the listed prices

What separates them

GIGABYTE B550M KGigabyte A520M K V2
ChipsetAMD B550AMD A520
PCIe to graphics cardPCIe 4.0 x16PCIe 3.0 x16
M.2 slotsTwo, PCIe 4.0/3.0 x4One, PCIe 3.0
DIMM slots and max RAM4 slots, 128 GB2 slots, 64 GB
Power delivery4+2 phases, better for high-core CPUsBasic VRM, best with 65 W chips
Video outputsHDMI and DisplayPortHDMI and DVI
USB-C on rear panelNoYes
Price as of November 7, 2026$78.98 at Walmart$88.90 at Newegg

Price history

$88.90$60.99
Nov 3Nov 7
  • GIGABYTE B550M K: lowest $74.99 on Nov 3 at Newegg.com.
  • Gigabyte A520M K V2: lowest $60.99 on Nov 3 at Techinn.com; $88.90 on Nov 7.

Prices at every store

GIGABYTE B550M K

  • WalmartNew

    In stockSold by Newegg Inc.Returns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $78.98Free shippingObserved Nov 7, 2026, 11:50 AM
    Visit Walmart

Also available at

  • AVADirect Custom ComputersCheck price at AVADirect Custom Computers
  • Newegg BusinessCheck price at Newegg Business
  • Newegg.comCheck price at Newegg.com
Prices and history →

Gigabyte A520M K V2

  • NeweggNew

    In stock

    $88.90Free shippingObserved Nov 7, 2026, 1:51 PM
    Visit Newegg

Also available at

  • eBayCheck price at eBay
  • WalmartCheck price at Walmart
  • Grooves-Inc.comCheck price at Grooves-Inc.com

Store links may earn us a commission. Price via Klarna.

Prices and history →

Specs compared

SpecGIGABYTE B550M KGigabyte A520M K V2
Motherboard Socket TypeAM4AM4
Motherboard ChipsetAMD B550AMD A520
Motherboard Form FactorMicro-ATXMicro-ATX
Motherboard ModelB550M KA520M K V2
Motherboard SeriesGIGABYTE, AERO, AORUSGIGABYTE
CPU ManufacturerAMDAMD
Form FactorMicro-ATXMicro-ATX
ManufacturerGIGABYTEGigabyte
Socket TypeAM4AM4
CPU CompatibilityAMD Ryzen 5000 Series, AMD Ryzen 3000 SeriesAMD Ryzen 5000 Series, AMD Ryzen 3000 Series
Motherboard CompatibilityMicro-ATXMicro-ATX
RAM TypeDDR4DDR4
Show all 40 specsShow fewer specs
SpecGIGABYTE B550M KGigabyte A520M K V2
RAM Maximum Capacity128 GB64 GB
RAM Speed3200 MHz3200 MHz
RAM Number Of Slots42
RAM ECC SupportYesYes, No
Discrete GraphicsNoNo
Memory TypeDDR4DDR4
Max Memory Capacity128 GB64 GB
Memory Slots42
ECC SupportYesECC & Non-ECC
Chipset

What reviewers say

GIGABYTE B550M K

  • 4.1 / 5170 ratings

Owners rate the B550M K around 4.1 out of 5, generally seeing it as solid value for a budget AM4 build. Praise centers on the dual M.2 slots and easy BIOS flashing; criticism targets the weak power delivery and sparse connectivity.

What people mention
  • Power deliveryCriticisedOwners say the 4+2 phase design is fine for mid-range Ryzen but not for high-core chips under sustained load.
  • M.2 slotsPraisedBuyers like getting two NVMe M.2 slots on an inexpensive board.
  • BIOS updatePraisedQ-Flash Plus lets users update the BIOS without a CPU, memory or GPU installed.
  • ConnectivityMixedReviewers find the port selection adequate but note the lack of Wi-Fi and fewer USB ports.

Gigabyte A520M K V2

  • 4.8 / 51,200 ratings

Owners rate the board highly for its price and reliability in basic builds. Most praise how quickly it boots and how little it costs. Complaints center on the limited feature set and the lack of overclocking.

What people mention
  • ValuePraisedBuyers say it delivers a working AM4 platform for very little money.
  • SetupPraisedOwners report straightforward builds and quick first boot with Ryzen CPUs.
  • OverclockingCriticisedThe A520 chipset blocks CPU overclocking, which some buyers miss.
  • ExpansionCriticised

Questions and answers

Which board is better for a Ryzen 7 5800X?
The B550M K. Its 4+2 power design handles the 105 W chip better, and it gives you PCIe 4.0 for the GPU and SSDs. The A520M K V2 is built for 65 W parts like the Ryzen 5 5600.
Do I lose speed with PCIe 3.0 on the A520 board?
For most graphics cards, frame rates drop only a few percent at PCIe 3.0 x16. The bigger loss is storage: a PCIe 4.0 SSD runs at half speed on the A520 board.
Can I use two NVMe drives on either board?
Only on the B550M K, which has two M.2 slots. The A520M K V2 has a single M.2 slot, so a second drive needs a SATA port.
Which one lasts longer?
Neither has a clear lifespan edge. The B550M K has more headroom for later CPU and RAM upgrades, while the A520M K V2 has fewer parts to fail and a stronger rating record.
Is the A520M K V2 worth the extra money?
Not at these prices. It costs $88.90 versus $78.98 for the B550M K, and it offers less expansion. Buy it only if you specifically want USB-C or trust its higher rating.
Will either board work with a Ryzen 5000 CPU out of the box?
Both list Ryzen 5000 support, but older stock may need a BIOS update. The B550M K can do that with Q-Flash Plus and no CPU installed; the A520M K V2 has no such button.

More comparisons

  • GIGABYTE B550M K vs ASUS PRIME B450M-K II AMD B450 AM4 Micro ATX Motherboard
  • ASUS PRIME X570-P vs GIGABYTE B550M K
  • ASUS PRIME X570-P vs Gigabyte A520M K V2 AMD AM4 Motherboard
AMD
AMD A520
Strengthtwo M.2 slots on a compact, inexpensive board.—
Integrated GraphicsYes—
GPU TypeIntegrated—
Output Resolution5120 x 2880 pixels—
Multi Card SupportNo—
Expansion SlotPCI Express—
External PortsEthernet, HDMI, DisplayPort, USB—
Number Of Memory Slots4 Memory Slots—
Maximum RAM128 GB Max RAM—
colorMulticolor—
sizeMicro-ATX—
Memory Speed—3200 MHz
Memory Channel Support—Dual Channel
Expansion Slot Type—PCIe 3.0 x16
Connections—USB-C, HDMI, USB-A, PS/2, DVI, RJ45 (LAN)
Bluetooth—No
Internal Connections—SATA, CPU Fan Connector, M.2
M.2 Form Factor—2280, 2242, 22110
Reviewers note the single PCIe x16 slot and few ports limit add-in cards.