Question one of my ram sticks stopped working after replacing a cpu and gpu

[gamestrike]

one of my ram sticks stopped working after replacing a cpu and gpu
pls help me
my cpu is i7 10700kf
gpu is rtx 2080
motherboard is b460-f

 

[vov4ik_il]

It might be the memory controller bus defective on the CPU (or one of the pins on the socket is not touching correctly), try with the old CPU, and if it works fine there is your answer.