Aurora R7 RAM help

So im trying to upgrade the ram in this older machine to Kingston Fury 2x8gb ram but I cannot get it to post reliably. I know everything does work because I was able to get it to recognize the ram and everything ran fine at first

Here's what I was doing when it worked

I installed 1 stick into slot 1 (closest to cpu) and it eventually booted after turning it off/on (can be replicated)

I went into bios, disabled xmp and saved/exit

After this I powered off the machine and switched the ram in slot 2 and added the other stick to slot 4.

Eventually like with the single stick it finally booted up for the first time but I cannot replicate this. (Pc won't post)

I don't know if there's a more consistent method or what it could be.

Any help would be appreciated!