You could be pushing your power supply to the limit (and beyond!) > I have a intell d850gb mother board and have downloaded the mosit recent bios update, 1.5 GHZ intell chip. My machine was running fine with no problems, I installed a adaptec 2100s raid card with 2, 37 gig scsi hd's Running in a raid 0 configuration. The raid card and drives work perfectly, however at a totally earatic interval the machine will shut down and restat its self as if it was unpluged and repluged back in.------------- I checked for irq conflicts or anything like that and cant seem to find anything, I even moved the card to a differnt PCI slot and it still does it. Any sugestions? > Do you want to signoff PCBUILD or just change to Digest mode - visit our web site: http://freepctech.com/pcbuild.shtml