Hardware Spec Index

Kyndral MB-4321 Plus B550 ATX Wi-Fi 6E Motherboard

Motherboards · Kyndral · SKU MB4321-PLUS · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index3,577 (Motherboards scale)
Category rank#7,134
Street price$249
Power34 W
Performance per dollar14.37
Released2021

Specifications

BrandKyndral
ModelKyndral MB-4321 Plus
SocketAM4
ChipsetB550
Form factorATX
Memory2× DDR4 DIMM, up to 64 GB
Max memory speedDDR4-4800+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots3 total
Rear USB-C1× USB 3.2 Gen 2 10Gbps (Type-C)
Ethernet2.5GbE
WirelessWi-Fi 6E (802.11ax, 6 GHz) + Bluetooth 5.3
OverclockingCPU + memory
VRM17+1+1 phases, 60 A stages
BIOSDual UEFI, BIOS flashback button

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Cite this page: Hardware Spec Index, “Kyndral MB-4321 Plus B550 ATX Wi-Fi 6E Motherboard”, https://vextor7.com/item/17568278 (accessed 2026-10-19).