Perhaps the settings are too high, but most likely your hardware is overheating. Try to clean any dust that may have collected (it helps more than most people think!). You can also try upgrading your GPU drivers. You can also try other heavy games or GPU benchmarks and see if you get the same freezes. A good test to see if it's something user/software related or driver/hardware related is to try to toggle the num lock led. If it does not work while frozen, the problem is not with RenegadeX, but with the drivers or hardware.