Hardware Spec Index

Kyndral MB-6557 Prime B550 E-ATX Motherboard

Motherboards · Kyndral · SKU MB6557-PRIME · Released 2021 · Updated 2026-10-23

Key facts

Benchmark index1,607 (Motherboards scale)
Category rank#37,588
Street price$69
Power16 W
Performance per dollar23.29
Released2021

Specifications

BrandKyndral
ModelKyndral MB-6557 Prime
SocketAM4
ChipsetB550
Form factorE-ATX
Memory4× DDR4 DIMM, up to 128 GB
Max memory speedDDR4-4800+ (OC)
Primary x16 slotPCIe 4.0 x16
M.2 slots2 total
Rear USB-C1× USB 3.2 Gen 2 10Gbps (Type-C)
Ethernet2.5GbE
WirelessNone
OverclockingCPU + memory
VRM10+1+1 phases, 50 A stages
BIOSUEFI

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Cite this page: Hardware Spec Index, “Kyndral MB-6557 Prime B550 E-ATX Motherboard”, https://vextor7.com/item/234853 (accessed 2026-10-23).