Hardware Spec Index

Zephyra MB-4991 Ultra B850 ATX Motherboard

Motherboards · Zephyra · SKU MB4991-ULTRA · Released 2026 · Updated 2026-10-22

Key facts

Benchmark index2,613 (Motherboards scale)
Category rank#32,647
Street price$129
Power26 W
Performance per dollar20.26
Released2026

Specifications

BrandZephyra
ModelZephyra MB-4991 Ultra
SocketAM5
ChipsetB850
Form factorATX
Memory4× DDR5 DIMM, up to 256 GB
Max memory speedDDR5-8000+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots4 total, 1× PCIe 5.0 x4
Rear USB-C1× USB 3.2 Gen 2 10Gbps (Type-C)
Ethernet2.5GbE
WirelessNone
OverclockingCPU + memory
VRM14+1+1 phases, 50 A stages
BIOSUEFI

Related guides

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Cite this page: Hardware Spec Index, “Zephyra MB-4991 Ultra B850 ATX Motherboard”, https://vextor7.com/item/93024840 (accessed 2026-10-22).