Hardware Spec Index

Orbita MB-8991 Prime B850 Mini-ITX Motherboard

Motherboards · Orbita · SKU MB8991-PRIME · Released 2025 · Updated 2026-10-24

Key facts

Benchmark index2,590 (Motherboards scale)
Category rank#34,575
Street price$149
Power26 W
Performance per dollar17.38
Released2025

Specifications

BrandOrbita
ModelOrbita MB-8991 Prime
SocketAM5
ChipsetB850
Form factorMini-ITX
Memory2× DDR5 DIMM, up to 128 GB
Max memory speedDDR5-8000+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots2 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, 60 A stages
BIOSUEFI

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Cite this page: Hardware Spec Index, “Orbita MB-8991 Prime B850 Mini-ITX Motherboard”, https://vextor7.com/item/97524164 (accessed 2026-10-24).