X299 FTWK Build, Won't recognize memory in Slot 1

X299 FTWK Build, Won't recognize memory in Slot 1 which ram slot for 1 stick According to the manual the DDR 5 ram is supposed to go in A2 & B2 when using two sticks i kept getting code 55 and no screen i took out 1 which interview slot is best Ram in slots B2, then A2 Also 1 time each with XMP on and off No crashes I ran OCCT memory stress test on a stick in B2

which interview slot is best Which RAM slot is 1? If you look at your RAM slots in the motherboard they are usually numbered 1-4 from the CPU outwards with the slot

which expansion slot is used by an nvme compliant device This mobo requires ram slot pairing of A2+B2 MSI Pro Z690 ram  I have 1 ram stick in my DIMM2 The previous setup, with 3 slots used was: 8 GB in DIMM1, 4 GB in DIMM2 and 4 GB in DIMM4 The ram codes are