Hardware Spec Index

Zephyra MB-4274 Plus B550 Mini-ITX Wi-Fi 6 Motherboard

Motherboards · Zephyra · SKU MB4274-PLUS · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index3,363 (Motherboards scale)
Category rank#36,234
Street price$249
Power33 W
Performance per dollar13.51
Released2020

Specifications

BrandZephyra
ModelZephyra MB-4274 Plus
SocketAM4
ChipsetB550
Form factorMini-ITX
Memory2× DDR4 DIMM, up to 64 GB
Max memory speedDDR4-4800+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots2 total
Rear USB-C1× USB 3.2 Gen 2 10Gbps (Type-C)
Ethernet2.5GbE
WirelessWi-Fi 6 (802.11ax) + Bluetooth 5.2
OverclockingCPU + memory
VRM16+1+1 phases, 80 A stages
BIOSDual UEFI, BIOS flashback button

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Cite this page: Hardware Spec Index, “Zephyra MB-4274 Plus B550 Mini-ITX Wi-Fi 6 Motherboard”, https://vextor7.com/item/20084676 (accessed 2026-10-21).