Zephyrus G15 having huge performance issues

[HugoBoss1000]

Hi,
since i added a 4TB Nvme in the secondary slots, my ROG Zephyrus G15 (GA_503RS) has literally lost all its performances in games (like 1-2 fps in menus).
Thinking about a GPU problem, i ran GPU test with OCCT, and got an OpenCL.dll missing error while testing GPU Vram (which i fixed by re-downloading the file manually and replacing it at its original place).
Now, OCCT GPU Vram test works fine, but i still have the same performance problems in games (tried to reinstall Nvidia drivers, also delete it and install it once again).

 

The thing is that if i go to Armoury crate and change the GPU mode from "Optimised"  to "Ultimate", the PC restarts to apply the change, and then after the restart, my games works fine as usual. (Of course if i switch back to "Optimised", performances issues reappears).

 

I haven't tried resetting the OS yet, does anyone have any idea what else I could do besides that ?

If i forgot important informations don't hesitate to ask me.

 

Specs:

Ryzen 7 6800HS

RTX 3080

512GB Nvme (OS)

4TB Nvme (the new one)

16GB Ram

[genexis_x]

Have u tried removing the new ssd and retest?

[HugoBoss1000]

10 hours ago, genexis_x said:

Have u tried removing the new ssd and retest?

Nope, haven't tried that yet, kind of the last chance move before reseting the OS disk.

[HugoBoss1000]

Ok, I switched from my parent's home to my apartment and the problem is gone (WTF).