Question PC doesn't POST ?

[DerPate]

Hello, I switched my Motherboard etc. after some problems and now also have new CPU and RAM.

Short, everything was working. Power cutted when I left home.

Now my PC only boots with 1 RAM Stick, even when moved.

14900k
32GB DDR5 Corsair Vegeance CL 30 6000Mhz
Gigabyte Z790 Gaming X

CMOS cleared etc.
Was using XMP before, now disabled.

Thats so weird, I had this RAM for 1 day and everything was working fine...?

 

[Tioym]

By 1 RAM stick do you mean the same stick or with either of the sticks?