My new GTX 260 (EVGA superclocked) arrived today and I was able to benchmark it against the same application on a 8800GT (1GB Palit). The application uses mostly cublasSgemm, with a few of the other cublas routines.
I was expecting something like a factor of 2 improvement in computation time (more processors, greater bandwidth), but got only about 33% improvement. Is this marginal improvement a product of the lower core clock rate of the 260? Or perhaps cublas hasn’t yet been tuned up for the GTX 260? I’ll take 33%, but I’m a bit disappointed.
My on-board networking seems to have gone out with the hardware upgrade; I suspect my power supply is marginal (although I think it meets the bare minimum requirement). The “card”, speaking loosely in calling it a card - its more like a box, is indeed rather large. At 10.5" long it barely fits in my case!