I'm pretty sure the x1650pro (being a slightly upgraded x1600xt) is generally faster than the crippled 7600gs. It doesn't quite approach the performance of the 7600gt or x850, but I believe the upcoming x1650xt will.
The mem bus was holding the x1600 back. If the 1650 doesnt have a 256 bus then it will have a very hard time beating a 7900gs.
Remember, the 6600gt had a 200mHz clock advantage over the 6800 but the mem bus was half the size and only got 1/2 the stuff done. Bus size is important.
If ATI makes a 1600 with a 256 bus on the memory then it will be pretty much a pipe reduced x1800.. i think.
-cm
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