Crash Log Help

I installed new drivers because the old 189.257 was not performing since the new cvars come out...... My machine was jamming for about 20 minutes and it froze up with the sound skipping like a scratched record, it never did reboot though, just went back to desk top with the render still playing the skipping audio with this warning box that had an error about the opengl has lost connection with display adapter, or something like that.... I have tried every scenario possible but no go. I am running two Nvidia 7600gt SLI mode on a AMD Athlon 64X2 Dual Core 6000+... I went ahead and attached Sys log I have been working on this foe 3 weeks and I am getting close but it still freezes up. It doesn't reboot, just looses hook. Any help will be greatly appreciated!!!!! huh