A week ago I installed a Geforce FX 5900 into my computer and everything ran great except my USB mouse. For some reason, ever since I installed the Geforce FX, if I have my USB mouse plugged in, my SCSI controller won't be detected. Thats not the big problem though. Today I was playing JK2 and all of a sudden my comp powered off and now it won't turn back on. I haddn't checked the temperatures lately but my computer alwas ran well under the dangerous zone (mobo around 45-50°C, CPU around 54°C and video around 51°C). It looks like it's not the power supply because the onboard NIC card's light is still on. The mobo is less than a year old, it's an Asus A7V8X-X. I have a 350w power supply (that use to be enough). I'm not really sure how much power my comp needs but I do have a lot of hardware. There's the Geforce FX5900 256MB (which needs its own power source), an AMD Athlon XP 2700+, 512MB DDR 3200, a 73GB Maxtor (Quantum) 10KII SCSI drive, another 60GB Maxtor 5400RPM IDE, a 24x10x40 TDK CD burner, a 2x Creative DVD drive, your standard floppy drive, a Creative Audigy Platinum (with the Audigy Drive), an LSI-Logic Ultra 160 SCSI controller (single channel), an external parallel port Zip Drive, a case fan in the front, and a case fan on the side pannel. I have a lot of those Y-splitters for the power cables because there wasn't enough. Am I just using to much power for my 350w power supply to put out? If so, why did it wait for a week before it died?