[SOLVED] In which RAM slots should these be mounted?

[emptyyetfull]

I have 4 slots in my motherboard (Z-370-P) how should I mount this RAM:

2 x Crucial Ballistix Sport LT - DDR4 - 8 GB - DIMM 288-PIN - 2666 MHz / PC4-21300 - CL16 - 1.2 V - non-ECC (BLS8G4D26BFSBK)
2 x Crucial Ballistix Sport LT - DDR4 - 16 GB - DIMM 288-PIN - 2666 MHz / PC4-21300 - CL16 - 1.2 V - non-ECC (BLS16G4D26BFSB)

Or should I better leave out the 8GB RAM sticks?

I think I plan on not enabling XMP. Not sure yet.

 

[iiSlashr]

Definitely enable XMP. You should never use that kind of combination, either go 2x8 or 2x16. Don't mix kits. The motherboard should have a little print near the RAM slots with 1A/1B/2A/2B or something along those lines, it'll tell you which slots to use.

 

[egda23]

These are not kits. They are 4 single sticks.
I would try the 2x 16 gb in the 2 slots that are indicated in your manual to be used at first:slot A2 and B2 as indicated page 1-7 of your manual. And hope for the best, WITHOUT enabling XMP. If the PC functions normally, you can progress from there.