I run my Duron 650 Mhz@800 at 1.7V. It temp is about 50C right now. However, I'm kind of disappointed. When I was writing my first message to the board, my system was running on 250W power supply. Yesterday, I replaced it with 300W hopping that I'd be able to overclock the processor by another 50 to 100Mhz. However, I failed to do so. I pushed the voltage to 1.8V but processor refused to boot up at 850Mhz. When I tried to do the same at 900Mhz, the processor almost get burned because once I turned on the computer after increasing speed to 900Mhz, the computer started beeping which according to the manual (Asus A7V) meant that the processor was overheated. Now, I do not know what is it that I'm doing wrong. With 250W power supply and with a generic heatsink, I had the same results as with brand new (no name) 300W power supply and Chrome Orb heatsink. Why ? Does quality of power supply really matters here. I run my Duron 650 Mhz@800 at 1.7V. It temp is about 50C right now. However, I'm kind of disappointed. When I was writing my first message to the board, my system was running on 250W power supply. Yesterday, I replaced it with 300W hopping that I'd be able to overclock the processor by another 50 to 100Mhz. However, I failed to do so. I pushed the voltage to 1.8V but processor refused to boot up at 850Mhz. When I tried to do the same at 900Mhz, the processor almost get burned because once I turned on the computer after increasing speed to 900Mhz, the computer started beeping which according to the manual (Asus A7V) meant that the processor was overheated. Now, I do not know what is it that I'm doing wrong. With 250W power supply and with a generic heatsink, I had the same results as with brand new (no name) 300W power supply and Chrome Orb heatsink. Why ? Does the quality of power supply really matters here. I've read posts where people claimed to overclock 600Mhz Duron to 950Mhz!!!!! So why can't I ?