Make sure your mb bios is up to date. Boot off memtest86 disk run it overnight to rule out ram.sounds like to me is the 430w ps not holding the load under games. Try hardware monitor to watch your ps outputs.
When I set it to medium/low it doesn't crash, which leads me to believe that it is in fact a overheat issue. How do I update the bios? I will run memtest86 tonight, and I will try hardware monitor as well. Thanks
Update: I ran memtest86 and I passed with no errors. I updated the bios which was highly fustrating and confusing. I then had to reset the cmos and I'm not even sure if I did it properly. Also what do you mean by hardware monitor? Do you mean some kind of software, or a physical piece of equipment? Because I would rather not have to spend money on a hardware monitor. If you could get back to me ASAP that would be great. Thanks
Further Update: I have fixed this crashing problem and it was caused by dust build up on my cpu's heatsink and my gpu's heatsink. They were both overheating and the cpu even spiked at 110C. So I decided it was time for a clean and I haven't crashed for about a week now. Thanks for all your help guys.