Hardware Spec Index

Kyndral MB-7991 Prime B860 ATX Wi-Fi 7 Motherboard

Motherboards · Kyndral · SKU MB7991-PRIME · Released 2026 · Updated 2026-10-26

Key facts

Benchmark index4,076 (Motherboards scale)
Category rank#49,539
Street price$349
Power40 W
Performance per dollar11.68
Released2026

Specifications

BrandKyndral
ModelKyndral MB-7991 Prime
SocketLGA1851
ChipsetB860
Form factorATX
Memory4× DDR5 DIMM, up to 256 GB
Max memory speedDDR5-9000+ (OC, CUDIMM)
Primary x16 slotPCIe 5.0 x16
M.2 slots3 total, 1× PCIe 5.0 x4
Rear USB-C1× USB 3.2 Gen 2x2 20Gbps (Type-C)
Ethernet5GbE
WirelessWi-Fi 7 (802.11be, 320 MHz) + Bluetooth 5.4
OverclockingMemory only
VRM19+2+1 phases, 90 A stages
BIOSDual UEFI, BIOS flashback button

Related guides

PCIe Lanes ExplainedM.2 SSD Sizes and KeysIntel LGA1851 SocketIntel 800 Series ChipsetsDDR5 Memory ExplainedPCIe 5.0 Explained

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Cite this page: Hardware Spec Index, “Kyndral MB-7991 Prime B860 ATX Wi-Fi 7 Motherboard”, https://vextor7.com/item/8723852 (accessed 2026-10-26).