Need Guidance. Black Screen.

Will do my best to explain, as I am very new to this and still learning. Please excuse any typos.

CPU:7800 x3d - stock no overclock or undervolt

GPU:6650 now but will be explained later

MOBO: GIGA B650 X AX

PSU: rm1000e W-less then two weeks old. sold 850w to my bro bro.

RAM: G skill 32 GB

I have two, 2k monitors. At which one is only plugged in at moment due to limitations of 6650.

Fractal north case proper cooling and ventilation. See photos.

Win 11. Actually just did full reinstall. clean install at that.

My story:

Searching through microcenter and came across 7900 xtx on "sale". Bought and took home with 1000w PSU to support. Hooked up, worked for three days then started having grainy images. Grainy led to artifacting which then let do blue screen. replaced 7900 xtx with known working 6650. Full refunded the 7900xtx. Still kept the 1000w psu in there.

Ran my tests using HWINFO64, CINEBENCH, HEAVENBENCH. Making sure that everything was copesetic before gaming. Even downgraded settings to of course account for lower GPU. Only playing POE 2 atm.

My puter then started black screening and restarting. No event in event log for the first few times until it started popping out WHEA-LOGGER error. Did my research and started watching HWINFO64 like to hawk to see if there are any drops or spikes. Nothing. I did reach out to AMD seeing that my 7800x3d would still be under warranty but am getting the work around from them. They are having me reinstall windows, default the bios, reinstall drivers, remove overclocks/undervolts : Things I've already stated have been done. At this point I am starting to think they are unsure as well. I have been doing my best to resolve the issue but the only thing i haven't tried yet is pulling the AIO to physically inspect the CPU. I haven't done it yet because i am out of paste :/ and haven't had a chance to run and get more.

I am looking for help/guidance because I am unsure how to progress from here. I am hoping that I do not have two failed new, out of the box, components, the 7900 xtx and the 1000w psu. I do not want to start replacing things because I do not know what is at fault and it can get expensive quick. I cannot afford a 10k PC as Jenson claims.

Please help. Beginner level knowledge. But am learning as I go.