Question System freezes after changing GPU

[Lukarios]

Hello, I just upgraded to 4070 ti super from 2080 super and I am experiencing freezes.
Freezes occur when I boot games and benchmarks. I have ran Unigine Heaven benchmark and noticed that GPU immediately gets on ~90% load, CPU as well. After 2 seconds both monitors freeze and I am forced to reboot the system. I did MemTest86 and got no errors, uninstalled old GPU drivers and installed new ones. Also CPU and Chipset drivers are up to date. I am out of ideas.

My specs:
CPU: Ryzen 7 5800x3D
GPU: MSI GeForce RTX 4070 ti super Ventus 3x OC 16GB GDDR6X + Alphacool Eisblock Aurora RTX 4070 ti Ventus with backplate
MOBO: X570 Aorus Master
RAM: G.SKILL 64GB (4x16GB) 3600Mhz CL16 TridentZ RGB Neo
PSU: Corsair HX1200i 1200W 80 Plus Platinum

 

[Lukarios]

Problem solved. It was bios setting that was forcing PCIe to run on Gen 4.0 while I had my card connected through PCIe extender that supported only 3.0. Switching to "Force Gen 3" solved all problems.
Thank you guys for participating ❤️

 

[COLGeek]

Good catch. Wasn't tracking an extension cable in the mix.

 

[XxDarkMario20xX]

Congrats hope you enjoy playing games and such.