mmm yet another game freeze..
Went black screen with just windows circle turning. Can't get these stupid bugs out. Really annoyed as it was a good race so far. I hope my disco didn't affect others.
I'm not a pc or hardware expert, but I had similar issues recently, and 2 culprit that made my pc restart when I was driving on a Sim, or playing at Ghost Recon:
1) GPU termperatures (after some 20 minutes the temps went to 100° celsius, so the Graphic card will go in protection mode, and the pc will restart). When I did some tests to check my temperatures I used a free software (TechPowerUp GPU-Z). So you can download it and run. Go in the second folder "Sensors", and at the bottom of the page flag the box "Log to file". Than go driving as you usually do, until you have a restart. Open log file (is a .txt) and check the temperature column. If you'll notice that temps go at 99° celsius, that is surely an issue, cause your pc will restart. I had a situation like this, so I had to unmount my graphic card, put one small drop of thermal paste on the processor, and temps went a lot better, never going over 70-75° celsius.
At this point I thought that I had solved the issue, but I was wrong. After I put thermal paste on the GPU, I only prolonged a bit the time before the pc restarted, so temperatures were not the only culprit. I checked the CPU temp with a twin software (CPU-Z), and temps were fine. So, the issue was definitely in my 6 years old PSU (600 W). So, if you haven't temps issues after you'll do some tests with the software I suggested, you have a couple of options:
1) test the PSU with a tester (if you know someone that can do it for you without wasting money and time);
2) Buy a new PSU on Amazon (a modular PSU is much expensive but easier to connect). For the future, a 650W PSU should be ok. Install and connect it, than try again to do a long stint, and see if you have the same issue. If the pc won't restart when you're driving, you have solved the issue. If the pc will have the same issue, PSU it's not the problem, and you can return it to Amazon and have your money back. That's the "italian way" I adopted