odd problem with PNY Geforce 3 TI 500 and Dual Athlon system

[99cents]

I recently purchased a PNY Verto Geforce3 Ti 500 video card from an online vendor, had no problems installing the video card, however, my display seems slightly corrupted. The problem is kind of hard to explain. It looks like there is a hint of television-like interference. It is always present. I have tried changing video card drivers, re-installing directx, changing resolutions and refresh rates with no success. I hooked up a different monitor with a different monitor cable and had the same corrupted display. I then tried reinstalling my old video card, and the display was fine. I put the Verto Geforce3 Ti 500 back in and the corrupted display returned. I was about the conclude that there is something wrong with the card. As a last test, I put the PNY Geforce3 Ti500 in one of my other computers, and the display was not corrupted. Now I am simply baffled. There must be something in my computer that has an issue with this specific video card. Any suggestions?

system specs:
Tyan S2460 Tiger K7 Dual Athlon Motherboard
2x AMD Athlon XP 1800+ cpus
1024 mb Crucial registered ECC pc2100 memory
Tekram dual ultra160 SCSI controller (DC-390U3D)
SB Live! Value (not 5.1)
SMC 10/100 ethernet (SMC1244TX)
MS Windows 2000 Professional
Enermax 431w power supply

[NDD]

First of all - respect on this baby, I'd like to see some benchmarks on our "Benchmark" page :)

From what I understood, this could be a problem with your PSU :(
Yeah, I know you can't possibly happen to have another Enermax 430W PSU around :), but you'll have to check this option (I just had same (?) experience with older Mac around here, "strange" video appearence got fixed by replacing the PSU). Rest of the config looks fine to me.

Best Regards ...