geforce 7600gt oc??? Ok, to let everyone know, I am a truck driver. I'm lucky just to turn on a comp with out a melt down (by me or the computer). I had just bought a 7600 to replace the 6700 I had on this confounded device. On STW KotOR II, the graphics are mind blowing. But the lock up is also blowing my mind. There is something about an STI or SLI or something that pops up over my nvidia icon. Saying that I need two cards for it to run and it is shutting down. But everything works except the unusual, and I might add, ill-timed lock up. This is a simple HP Pav a815n with a 3400 amd 64. I am reading a book on building my own PC.(for me, the best way to learn is to have hands on experience). Until then, this is my "gaming" system. What might be causing the lock up, how to stop it, and, in the name of Darth Vader,why am I walking through boxes, and being shot through walls in Star Wars galaxies.