Hardware Spec Index

Zephyra MB-8939 Ultra B550 E-ATX Wi-Fi 6 Motherboard

Motherboards · Zephyra · SKU MB8939-ULTRA · Released 2020 · Updated 2026-10-23

Key facts

Benchmark index4,504 (Motherboards scale)
Category rank#47,223
Street price$339
Power41 W
Performance per dollar13.29
Released2020

Specifications

BrandZephyra
ModelZephyra MB-8939 Ultra
SocketAM4
ChipsetB550
Form factorE-ATX
Memory4× DDR4 DIMM, up to 128 GB
Max memory speedDDR4-4800+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots4 total
Rear USB-C1× USB 3.2 Gen 2 10Gbps (Type-C)
Ethernet2.5GbE
WirelessWi-Fi 6 (802.11ax) + Bluetooth 5.2
OverclockingCPU + memory
VRM19+2+1 phases, 90 A stages
BIOSDual UEFI, BIOS flashback button

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Cite this page: Hardware Spec Index, “Zephyra MB-8939 Ultra B550 E-ATX Wi-Fi 6 Motherboard”, https://vextor7.com/item/11237474 (accessed 2026-10-23).