Hello there, see my specs:
Athlon XP 3200 (2.3ghz)
Abit AN7 mobo
i'm between a HD 3850 with 512mb DD3 and a 4650 with 1gb DD2, i know the 3850 is superior, but i wonder if my CPU will bottleneck it so hard that it wont run faster than the 4650 would.
Also i'm a bit worried about the psu, seen in review that the 3850 consumes a lot more power than the 4650.
If the HD 3850 runs even 5% faster than the 4650 in this machine i'd go for it, otherwise id rather go for the other one for a softer power consumption (and cheaper).