This was an excellent article for me, especially since I have a very similar system. Except my memory setup was much nicer to work with. My 7950GT(AGP)just recently died leaving me with my old 6600 (not even GT) which was not doing very well. Actually it sucked. After reading this article I decided to purchase the 3850. It is an excellent replacement for my dead 7950GT. I think the miss-matched memory really hurt the 3DMark06 scores in the articles test. I also used XP instead of Vista which may have also made a diffrence.
3DMARK06: 5820 @ 1280x1024 My system No overclocking
4907 @ 1280x1024 Articles System
Athlon 64 3400 (socket 754)
Abit NF8-V2
Corsair CMX1024-3200PT (2x1GB)
Powercolor AG3850 512MD3
Creative Audigy 2
WD 1500ADAF Raptor
Spire Rocketeer V 500W
Xp Pro