Sorry if I worded that wrong. I meant that with the 1070 TI I had no stutters in the Finals, and when I changed back to 3070 TI, I had no stutters anymore.
I also tried Snowrunner with both and I still get those hitches no matter which card I use
So you had stutters in The Finals with the 3070 ti, but when you changed your GPU to your friend's GPU you had no stutters. And when you reintroduced your GPU back the stutters disappeared?? That's weird
You also mentioned you had some dirt on your connector
But if Snowrunner still runs the same, then that means it's not from the GPU.
What's your PSU now? I know you said you changed it. I would also try out the SSD from your friend