I don't know, I think this KT7A MB is a bit fishy. Check this out. I got new Crucial memory one day to replace the crappy PC133 generic in my system at the time. Same motherboard I got now, mind you. When I took out all that generic stuff and put in the crucial mem, my system booted ok at first. Then it REBOOTED by itself, and I got a popping noise like a short on the MB and the damn thing started smoking. Since then I look in my case every so often and nothing looks, smells, or feels burned at all. I cannot, for the life of me, see what the heck was burning that day. Everything seems to work just fine, as can be expected in an overclocked system. This has riddled me since then. But now it lets me down the IO voltage and still be very stable. I am so confused...