Low frame rate when playing games

[FastHonda]

I've been having low frame rate issues when playing FPS games and is happened since I was playing cod one day and it began with my monitors turning off and then the computer to crash and reboot itself multiple times. Found one of the ram sticks was causing part of the issue so I replaced all the ram at once, that took care the issue
where the computer was crashing/rebooting on its own. I was still having issues with power where after a while computer would just shut off so I replaced the power supply which was a 850 watt to a 1000 watt. After that I've tried to play fps games and while playing no matter the quality settings or resolution it seems the frame rate has slow response. I figured it was an issue with the
graphics card so I replaced the GPU from 2080 ti to 3080 ti. Attempted to play the same games again to see if the issue was taken care of but the problem is still there. Now I figured it was probably an issue with the motherboard so I replaced that as well and the issue is still there. The GPU and CPU are water cooled and running about 10 fans
with 2 radiators. Never had an issue before until the ram stick went out. All drivers are up to date as well as windows and Bios is up to date as well. At this point I don't know what is going on with my computer and any help will be appreciated.

Current PC Set up:
Gigabyte Aorus Z390 Pro
Intel Core 19-9900KF
32gb Ram Corsair Vengeance Pro (Four 8gb DDR4
3200MHz)
EVGA Geforce RTX 3080 Ti FTW3 Ultra
EVGA Supernova 1000G+ (1000 watt PSU)
Samsung 970 Evo Plus M.2
Samsung 980 Pro

Windows 10 home 64bit
Don't know if monitor matters but running a Samsung Odyssey G9

 

Also will check for any response when I can since I work overnight shift and sleep through the day.

[Dukesilver27-]

Maybe check if the RAM is in the QVL list for your board, check here https://download.gigabyte.com/FileList/Memory/mb_memory_z390-aorus-pro_191108.pdf?v=6af115148535138831d5ac39e7ec0fdd.

People seem to encounter strange issues where it was resolved due to changing to a RAM in the QVL list.

[FastHonda]

That ram sticks do work with my current motherboard as well as my previous one

[Robchil]

did you ever reinstall windows? 

 

[Edgar R. Zakarian]

You mentioned watercooled etc. etc. But did you actually check the temps on CPU and GPU? 
Are they actually cool and running at good clocks? 
If your cpu was underclocking/thermal throttling itself it would explain bad FPS regardless of the GPU.

[FastHonda]

I did wipe to all hard drives and reinstalled windows before I replaced the motherboard and the problem was still there. As per the cooling temps they were ranging between 47-49 degrees celsius