I have built a computer. I have a drr3 MSI NVIDIA GeForce NX7900GS 512MB Overclocked Edition graphics card. My problem is the computer will freeze up then screen goes black for a few minutes reboots gives me a message says system has just recovered from a serious error.Should I increase the PCIe slots voltage from 75wt to alittle higher? Is this my video card doing this? Any suggestions would be helpful.