Check your memory and processor; one might be faulty.
Check your memory and processor; one might be faulty.
TL;DR: Figure out if your instability comes from RAM, CPU, or another issue. Your specs are clear, but memtest86+ passed last night while Prime95 failed. You’ve tried many fixes—BIOS tweaks, RAM overclocking, different power supplies, OS changes—but crashes still happen. The memory tests gave no signs of failure, yet the Linux version reported errors at random times. Your CPU’s performance is weak under load, and it only reaches 4.0 GHz in heavy use. The PSU was faulty, but that seems unlikely to cause ongoing problems. You’re unsure because your RAM is old, the motherboard might be fine, and you can’t afford replacements. What’s most likely is a combination of CPU limitations and possibly degraded memory.
I attempted it, but it didn't work consistently even when using a stock setting. Adjusting the voltage beyond +50mV leads to the PC failing to boot.