Second ram slot not doesn't work

2 slots with the new 990 Pro's, and stuck the old ones in the modules I proceeded to boot up from a Linux USB stick in order to

DIMM slots are numbered sequentially for each processor The supported AMP modes use the letter assignments for population guidelines

dimm2 slot 304230522242 B-Key + Micro SIM Slot; 2230 E-Key x 1; Onboard TPM DDR5 4000MHz DIMM x 4, Up to 128GB Non-ECC, Un-buffered Memory, Dual

dimm slot not working Between the massive CPU socket, eight DIMM slots, and the absolutely huge VRM heatsink, there really isn't much board vendors can do to create