Originally posted by: AnAndAustinYou will lose about 20% perf going to PCI rather than the same card in AGP, do consider upgrading your mobo to take a faster CPU and an AGP gfx card, it may not be as expensive a you think.
Pricewatch:
AthlonXP1800+ $70
AthlonXP2000+ $90
Decent HSF $20
SktA mobo $50-60
256MB DDR-PC2100 $45
256MB DDR-PC2700 $55

You may need a new PSU, pref 350W+ and ideally Antec, Enermax, ToPower, SFlower or Sparkle ($30-60). You'll need to check all your current add-in cards are PCI, they should be, if not replacements are very cheap ($10-20). You'll need to check your case has decent ventilation and pref a case fan mount or two, if needed you should find a good bundle deal with a new PSU. You should be okay with all this, but it could be a factor. Some SktA mobos supply SDR (PC133) as well as DDR RAM slots which can really keep costs down and will only hit perf about 10%. So XP2000+, HSF and mobo would cost about $165, if you want DDR, PC2700 gains very little in SktA but is wise for o/c'ing headroom, fast RAM timings and future usage. You'd still need a gfx card, GF3 or Rad8500 would more than do for under $100 although a GF4TI4200 would be nice. The perf boost would be very considerable.