Question CPB Induced crashes

[staticOdyessey]

So I'm asking this on behalf of my friend, so he recently noticed his pc was acting up, decided to reinstall the windows, while reinstalling he had bunch of issues of it being stuck on loop while booting, while we fixed most of the issues I noticed his CPU was running at 75 celsius idle in BIOS, to which he replied "Oh when I'll turn it on it's going to be at 20 celisius." It was 80c when he booted it up, turns out my guy was using a Ryzen 9 5900x with AM4 stock heatsink (images of the mess

https://imgur.com/a/4UNxzzk

View: https://imgur.com/a/4UNxzzk
, afaik he used a liquid metal thermal paste with it)

He did pick up a PA 120 today but now with CPB on games crash within a minute when he loads them up, but when testing in OCCT there are 0 crashes and when he turns off CPB it doesn't crash at all, I guess my question is could CPB be causing all of these issues because he lacked proper cooling earlier and now the CPU is a mess pretty much?

Before reinstalling or adding the new CPU cooler his PC used to crash only when it was idling and he used to leave games open in order for it not to crash actually.
Also we stress tested the system with OCCT and got no crahses.

SPECS
CPU: Ryzen 9 5900x
CPU cooler: Thermal Take PS 120
Motherboard: b550 gaming xv2
Ram: Corsair Vengeance RGB 32gb DDR4
SSD/HDD: Corsair mp600 PRO LPX
GPU: 1060 (yes hes aware of the bottleneck)
PSU: Corsair rm850 (Supposedly from 2011-2012)
Chassis: Some Corsair case, not really sure
OS: Windows 11
Monitor: Asus bg2580q

 

[Lutfij]

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.

You've hopefully sorted out one of the issues, which was working with the wrong cooler for your processor. Did you clear the thermal paste on the CPU's IHS with isopropyl alcohol before repasting with a good quality thermal paste and then dropping in the Thermalright Peerless Assassin 120?

but now with CPB on games
Please elaborate. Do you mean Core Performance Boost?

 

[helpstar]

would check the CPU socket of the motherboard and cpu itself for metal residues of the liquid thermal paste

 

[staticOdyessey]

Hey I apologize, here's the specs, yeah he's cleaned it and around it was well, BIOS has been updated to the latest as well.

CPU: Ryzen 9 5900x
CPU cooler: Thermal Take PS 120
Motherboard: b550 gaming xv2
Ram: Corsair Vengeance RGB 32gb DDR4
SSD/HDD: Corsair mp600 PRO LPX
GPU: 1060 (yes hes aware of the bottleneck)
PSU: Corsair rm850 (Supposedly from 2011-2012)
Chassis: Some Corsair case, not really sure
OS: Windows 11
Monitor: Asus bg2580q

EDIT - Considering his PSU is SO old, I am thinking of giving him my spare Corsair rm850x to replace the rm850, does he need the cables as well or can he just replace the PSU and use the old ones?