Originally posted by: Cookie Monster
Technically IQ should be better with GTX260. AMD/ATi still uses an angel dependent AF algorithm which according to lopri can sometimes be visible unlike the G8x/G9x/G200 AF. AA is a tossup really.
Power usage as of now seems to be more efficient on the GTX260. The HD4870 can handle higher AA modes well, and does have other nice features like DX10.1. But then again, a GTX260 can OC pretty high, enough to reach GTX280 speeds. Noise is pretty subjective with reviews conflicting with one another in that regard.
Id get whatevers cheaper.
Also with havok, does it actually run faster on GPUs? its not like other cards are being left out, since havok's physics engine had been running on CPUs for quite a long time now without killing performance for that matter. Same goes for PhysX. Benchmark comparisons should be nice, but at this moment in time, i dont think it really matters for it to be one of the buying decisions IMO.
Havok doesn't run on the GPU yet, AMD has said they are working on it but havent given an ETA.
As for PhysX, I have heard lots of games supporting it are in the pipeline since the NVDA acquisition but I havent heard anything specific recently so that might be fluff.