Ok, for some reason my main AMD machines are dying. System 1 - Athlon 1gb, ABIT KT7-133 RAID board. Refuses to power on. (comes on for a split second before powering off). If I reset the BIOS, and disconnect and erconnect just about every lead and card, it works. Then, after 20minutes, just dies. Thinking it might have been cooling, I bought a mahoosive heat sink and fan. No joy. system 2 - Duron 800, Gigabyte board. Same thing. Again, bought a new cooler. I fact, given the silly prices, I bought a Duron 1200 as well. Same thing. Machine dies after 20mins use. It is not temperature (it was running at 43 deg C seconds before). And unless I disconnect and reconnect, it will not power on. neither machine is overclocked or tweaked... both use 300W PSUs. Both have 256mb PC133 on single stick. The Duron is as bare bones as I can get, with just a video card (GF2-MX), LAN card (Compaq), hd, DVD and floppy. The Abit has a bit more, Parhelia, LAN, Audigy, DVD, CDRW, 2xHD, LS-120 (and was running on a 250W - upgraded PSU to rule out power) any ideas?