Thermal performance at 41°C for the fx-8159
Thermal performance at 41°C for the fx-8159
Your CPU is experiencing thermal throttling on the FX-8150 at around 40°C. It works normally at higher temperatures but slows down after a short time, even though it has a good score. You've checked the UEFI settings and looked for fixes, but nothing seems to help. Consider checking the cooling system, ensuring proper airflow, and verifying that the CPU is not overclocked or damaged.
There's a decent chance that this is some form of power throttling, as in the VRM of the motherboard is overheating and causing the CPU to throttle to prevent the motherboard from blowing up. Unless you're on a relatively high end AM3+ motherboard, which not many existed or made sense to buy, this is pretty likely. You can see if your board has a thermal sensor readable in something like HWINFO, but on old boards like that it's about 50/50 whether it does or not.