I just put together my NF7-s rev 2 and AMd 3000 Barton FSB400 and 1 gig Corsair. No problems and installed XP slick as can be. While I was booting and rebooting installing sofware the PC made a small pop sound and stopped running. A slight smell of electrical smoke tickled my nose!!!! I shut of the Power Supply and sat there in shock. Here is where I can use some feedback. After I let it sit a bit I turned the PS switch back on. (the case is open so I can see inside) the red light by the SATA contoller comes on so PS appears OK. I now turn on PC. I get continuose High Low tones for 3 seconds, the fans start to spin up and stop then everything is quite. I did a search for "PC Beep Tones" and read where the High Low tones mean the CPU is bad. Subsiquent boot up to get the tones don't work now. All I get is a brief spin up of the fans. I hooked up a second power supply and gave it a try. same thing. Fans start and then stop. I took my old ( perfectly functional) AMD Duron 1.4 and put it in the the NF7-S and it gives me the High Low (sounds like a European Ambulance) tones and fan surge each time. This time it does it until I turn the power off at the PS. Same event each time I try it. I hooked up the old power supply to my Kg7-R sitting on a cardboard box. First I try it with no CPU and the fans spin. I put in the 1.4 and same thing. I put in the 3000+ same thing. This is not a great test but I did not want to tear the NF-7 out of the case yet. So at this point I want to think that the NF7-S burned up. Even though the High Low tones are suppose to mean it is the CPU. Before I call NewEgg I thought I would run it buy everyone to see what you thought??? Thanks John