You may get problems in overclocking your Athlon if you have small power supply unit !!! There’s a big label on your ASUS mainboard manual to use at least a 235W supply, but several pages later there is an other comment to use only above 250W – hmmm. It’s not a big difference between these values but it may be enough to get an instable Windows ! If you recall my last report about overclock Athlon 500 you saw my testboard at 850 MHz. A few days later i’ve tried to put this board into my PC, but the result was a crashing Windows. I’d disconnected all other devices except my mainboard, cpu, one memory module, grapiccard, hdd and my results are much better. My Athlon runs fine at 850 MHz without any crashes ! So i’ve decided to order a good 350W power supply unit to get better results and the problem was solved. Think about this if you have problems to get your Athlon system to higher frequency !!!