This has been bothering me for a while. After a few minutes of playing any newer game, my monitor will go black and tell me there is no connection. The sound usually loops at that point and I can do nothing but hard reset. I've been trying to find an answer online and thought my psu was the problem, so I bought a new one (now at 550 watts), but that hasn't helped. My computer is pretty old, (the processor is an AMD athlon 3500) with an updated graphics card, (BFG nVidia 9600 oc). Any advice? Is it a temperature problem or just the result of an old processor? What other info can I provide that may aid in finding a solution?