Hardware Spec Index

Kyndral MB-7891 Ultra B550 Micro-ATX Wi-Fi 6E Motherboard

Motherboards · Kyndral · SKU MB7891-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index4,511 (Motherboards scale)
Category rank#35,289
Street price$379
Power41 W
Performance per dollar11.90
Released2021

Specifications

BrandKyndral
ModelKyndral MB-7891 Ultra
SocketAM4
ChipsetB550
Form factorMicro-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 6E (802.11ax, 6 GHz) + Bluetooth 5.3
OverclockingCPU + memory
VRM19+2+1 phases, 70 A stages
BIOSDual UEFI, BIOS flashback button

Related guides

PCIe Lanes ExplainedM.2 SSD Sizes and KeysWi-Fi 6E ExplainedAMD AM5 Chipsets ComparedIntel 800 Series ChipsetsAMD AM5 Socket

Similar Motherboards

ModelBenchmarkPriceCompare
Halcyra MB-4647 Ultra X570 Micro-ATX Motherboard1,822$69Compare
Novexa MB-2938 Plus B650E Mini-ITX Wi-Fi 6E Motherboard5,537$559Compare
Halcyra MB-6396 Prime Z790 ATX Wi-Fi 6E Motherboard5,449$589Compare
Kyndral MB-6318 Max X570 ATX Wi-Fi 6E Motherboard5,421$549Compare
Novexa MB-8620 XT B760 ATX Motherboard2,738$139Compare
Novexa MB-5341 Core H810 ATX Motherboard2,181$79Compare

All Motherboards · JSON

Cite this page: Hardware Spec Index, “Kyndral MB-7891 Ultra B550 Micro-ATX Wi-Fi 6E Motherboard”, https://vextor7.com/item/17221600 (accessed 2026-10-22).