anothername: Sure.
http://www.gamezone.de/Benchmarks/
Scroll a bit down and click "Direkter Vergleich" (Direct comparision) under "Grafikchip Benchmark". Choose the Manufacturer (Hersteller), Series & Product in the following dropdown menues.
JCD-Bionicman: Thanks dude. If I'd marked this as a question like I should have I'd give you the solution.
np. Good luck with the GPU of your choice :)
anothername: A 7730 mobile GPU has roughly 30% less power than a 650 GTX desktop GPU.
Phc7006: Indeed. but to be fair one should compare mobile versions between them, not a mobile 7730m vs a desktop 650.
The 7730m is a scaled down version of the 7750m. While based on a cape verde GPU, it will in most cases be 15 to 25% slower than the 650m. In Skyrim, it will be 17% slower , and 32% in Arkam Asylum, for instance. The 2gbs are of little importance on screens used in laptops.
Err... the OP is choosing between Desktop GPU power and Notebook mobility and asked how the before mentioned GPUs compare to make an informed descision before probably spending a few hundred bucks (correct me if I'm wrong). Its not fair that I cannot put my bigtower and 24" screen into a 15,6" Notebook bag either, but this thread is not about fairness ;)