I also have 3Dlabs card.
Here is mine configuration:
Intel Rock Lake D865PERL Motherboard
Intel Pentium 4E Prescott 3Ghz
2Gb RAm memory
3Dlabs Wildcat Realizm 100, 256Mb memory
Win XP Professional SP2
Problems I have faced are that in the beginning when all was new it worked perfectly, but almost a year after we got this PC it started problems. First almost every week cpu temperature went over 60 C, then when I;m working in Pro/E (WildFire 2.0 M130), after 1 hour everything start to get slowly (all programs in windows, notepad, windows explorer etc.). Then I must shut all down, and start again. Then really I don't know is this simply graphic card problem or entire system (well my guess was that first. CPU cooler is bad, second I need big tower instead mid, third I need brand name Power Supply).
Does anyone have similar problems?