Stability Issues with CPU/RAM/Mobo

[Tbone]

Not sure who will see this who can help, but figured I'd post so that I can at least organize my thoughts.

Rig:

ASRock x570m Pro4
Ryzen 5 3600
Corsair LPX Vengeance 8x2 3000mhz DDR4 RAM
Nvidia 3080
MSI MPG A850GF Gaming Power Supply
Corsair 4000D Airflow Case

I upgraded the CPU, RAM, and Mobo back in 2019, the video card in 2020, and the PSU and case a few weeks ago.

After my first upgrade, I was stuck in a boot loop for a while. I e eventually solved this by manually setting some voltage for the RAM and CPU. I used the XMP profile to get 3000mhz at 1.35v. The CPU had to be manually set to 3600mhz at 1.3v. This allowed me to boot normally.

After upgrading to the 3080 and trying more intense games/apps, I would sometimes get crashes that seemed power related (no BSOD - just a sudden shut off and turn back on). I undervolted the GPU which seemed to help a bit but noticed I would still occasionally get these crashes.

Recently I did some more testing and found that it was actually my CPU that was likely causing the crash, as temps were quickly getting into the 90s and beyond when running something. I switched out my case and the power supply (as it was very very old), but ultimately it was lowering the voltage of the CPU that helped the most. I'm now running the CPU at 1.28v with a -.05 offset. Any lower and the computer resets itself.

It's been pretty stable since this change, with temps staying in the 70s in games like Cyberpunk. BUT I'm still running a higher than recommended voltage and I'm still having to throttle the frequency at 3600, so my temps are still higher than normal and performance could be a little better. I just don't know if this is something I can fix or if I should have RMA'd something back in 2019. Everything is up to date (bios, etc). I've heard the RAM can cause issues for some reason, but everything should be compatible and play nice with each other.

[Tbone]

My stability started to nosedive, so I bit the bullet and got a new CPU and motherboard. Intel 13600k paired with MSI Pro z690-a DDR4 motherboard. No power issues! No crashes! And runs like a dream! https://www.userbenchmark.com/UserRun/57068072

I slapped a cheap liquid cooler on it (ID-Cooling Frostflow x240) and it keeps it nice and cool! The only tweak I had to do was changing MSI's CPU Lite Load setting from 12 to 5 as MSI is giving the wrong voltages for 13th gen, making them too hot.

I'm pretty sure my original issue was just a faulty board (or CPU).