Hardware Spec Index

Kyndral MB-6399 XT B550 ATX Motherboard

Motherboards · Kyndral · SKU MB6399-XT · Released 2020 · Updated 2026-10-26

Key facts

Benchmark index2,801 (Motherboards scale)
Category rank#7,947
Street price$129
Power27 W
Performance per dollar21.71
Released2020

Specifications

BrandKyndral
ModelKyndral MB-6399 XT
SocketAM4
ChipsetB550
Form factorATX
Memory4× DDR4 DIMM, up to 128 GB
Max memory speedDDR4-4800+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots3 total
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, “Kyndral MB-6399 XT B550 ATX Motherboard”, https://vextor7.com/item/1743090 (accessed 2026-10-26).