In a response to my
previous post about the new NVIDIA GTX690, Greg Estes
cautioned that comparing Kepler and Fermi was a fool's errand, and AnandTech's
benchmarking has borne that out (as has previous Kepler
benchmarking):
"Unfortunately for NVIDIA GK104 shows its colors here as a compute-weak GPU, and even with two of them we’re nowhere close to one [Radeon] 7970, let alone the monster that is two. If you’re looking at doing serious GPGPU compute work, you should be looking at [NVIDIA] Fermi, [AMD] Tahiti, or the future [NVIDIA] Big Kepler."
The Fermi GPUs found in the Quadro series, GTX500 series, and the
Tesla are far better suited for GPGPU duty than the new Kepler cards. Those are tuned for gaming performance only.
Takeaway: counting CUDA cores doesn't tell the whole story when you are choosing a GPU for your rig.
Best,
Andy
