I just bought an A8V Deluxe with an Athlon64 3500+ (130nm newcastle) and 1GB of mushkin pc3200 DDR ram. All of the above plus a floppy drive and nothing else wouldn't run with my Enhance 300W power supply. Okay, I get that.. So I bought a 350W Antec SmartBlue PSU from Circuit City (impatient).... Only after resetting the CMOS will it boot to the BIOS and/or a floppy disk once every 20 or so times... most of the time it just says "System Test CPU Failed" just like it did with the 300W. So I order a Thermaltake 420W PSU from newegg: http://www.newegg.com/app/viewproductdesc.asp?description=17-153-006&DEPA=1 Works a little better. Every time I reset the CMOS it will boot, go into the BIOS, doesn't lock up, and I even booted from a floppy and flashed the BIOS to v1008. But whenever you restart, hard power off or soft restart, the "System Test CPU Failed" returns. I doubt it's the CPU since it'll sit in the BIOS on the hardware monitor just fine and even boot to a floppy without locking up using the latest 420W PSU. I'm tempted to just throw a huge PSU at it to see what happens since it's gotten marginally better with each step up. But on the other hand, shouldn't the 420W Thermaltake run AT LEAST the board/chip/ram and a floppy reliably? Or is that still underpowered? Anyone running a 3500+ on an A8V? What kind of PSU do you have?