Can someone PLEASE help as I am on the verge of giving up! I had a pc with specs of athlon 2400xp, 512 333 ram and a gainward Ti4800 graphics card and a cheap L7VTA mobo, all ran no probs at all.... I recently upgraded my motherboard to an xfx NF24-ALH board. PC works fine, except for when I try and play games, its a bit random, but usually when the game loads and the actualy in game graphics appear, or sometimes it'll play until you actually move in the game, the monitor goes blank as if into standy mode as the LED goes from green to amber. I am at a loss as to whats the cause, but with my old mobo it still works fine. I then bought a new grahpics card, xfx geforce 6600 GT and exactly the same thing happens. The new graphics card in my old mobo still works fine! I've checked everything I can think of in bios, AGP 8x or 4x, makes no difference, installed the latest drivers for both mobo and graphics card from nvidia's site...bought a new 450W power supply, no difference, I even formatted my machine to start from scratch (probably a bit pointless) but still the same thing happens.. can anyone please offer any suggestions before I throw in the towel....!