CN-04KC81 IPRKL-BO/CB Mainboard for 5090 MFF (04KC81 / 4KC81)

Mainboard replacement for 5090 MFF systems — board designation IPRKL-BO/CB. This unit is identified by part numbers CN-04KC81, 04KC81 and 4KC81. Intended as the mainboard for the 5090 MFF platform; use as a direct swap when repairing or refurbishing compatible units. Verify connector layout and mounting points against your chassis to ensure fitment before installation.