Cpu tempeture increasing to 100 degrees (Celsius) on BIOS

Hi there,

As the title suggest I'm having a big problem with my desktop pc.

To put in context, I recently decided to update a couple of things on my desktop pc, including my case and cooler system. Due to that I had to move all to the new case and I was extra carefull with all the components. Nevertheless when I finished willing to install windows my computer shutdown middle way, I didn't thought much of it thinking it was a software issue (corrupted USB installation tool) more than a hardware issue.

I spend the next day trying many different things to check why the computer was shutting down, taking the ram sticks, checking all the power connections, checking if it was my solid drives that could be corrupted. At the end I was able to track the issue to the CPU increasing the temperature up to a 100 degrees and getting shut down.

I immediately thought that the issue was related to the PSU, which honestly is a shock because I was working fine prior my update and I swer for all Gods that I was extremely careful with all the components (plus, I don't gain nothing on lying here)

I tried using my brothers PSU to check if the issue was related to it, yet the computer followed the same pattern, slowly increased its temperature until it shuts down. After that I thought that the problem was the motherboard, I use all the money I have left and bought a new one today.

Unfortunately after installing everything to the new motherboard the issue remains.

I really need help because honestly this is driving me crazy and I don't have any idea what is the issue.

Note: all the CPU pins are fine, I check them today when I change the motherboard.