click here be grateful is the wise sages on the forum would have a look at these two cards and give me a bit of advice. will be upgradeing from an fx5200. don't laugh please. will be mixed with an athlon xp 2000+ and 512 ram. winxp sp1.
If I may change things slightly as I seem to show a preference to Nvidia cards. Would take recommendations for ATI card at around the same price if people believe I may get better card/performance. Not sure what the equivalent is opposite the GeForce 6600.
This gives you a comparison click here remember that the one they tested was the 6600 128mb card not the 256mb one so it may be a bit better and look at the plain 6600 not the 6600GT as its a different faster card, from what I can see benchmarkwise they seem fairly similar. Though the 6600 is a newer card so will be more up to date with support for Direct X etc.
I have a similar spec to yours; Athlon XP 2100+ 512 mb ram, win XP, and I recently sought advice on what to upgrade to graphics wise. General opinion then was a vanilla 6600, as anything faster wpould then be bottlenecked by the processor.