Just an FYI, thermal throttling won't happen at 75 Deg C. You should be having about 9,500 on your score.
When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.
CPU: Ryzen 5 3600X
CPU Cooler: Peerless Assassin 120 Black
Motherboard: MSI B450M-A PRO MAX
Ram: G.Skill Ripjawsv 16 GB (2x8 GB) 3200MHz DDR4
SSD: Kingston A2000 500gb 2200/2000mb/s
GPU: XFX Swift 6700 XT
Chassis: I don't know exactly what this word means, but I think you are asking about my case model. MSI Vampiric 010m. There are 5 extra fans of Arcitc brand inside.
OS: Windows 10 Lastest version.
Monitor: Dell G2722HS 27
PSU: Cooler Master 650 watt bronze
BIOS Version: E7C52AMS.3GO
Except for the GPU,coole and monitor, I can say that most of the remaining parts have completed their 3 years.