Here better info about the 650m: GT 650M
And here info about the 660m: GTX 660m
Long story short: 660m is better. In 650m, the highest core clock use slow ddr3. The slowest core clock close use fast ddr5. None of these conditions is enough to surpass the GTX 660m
Thank you for the insight and the good articles. I keep forgetting to go to "Notebookcheck.com" for my info.
And thanks for the explanation as to why the "up to" was in the specs.
I wonder if O/Cing the GDDR5 650m would be practical in order to bring it to 660m specs? Heat generated by O/Cing would no doubt be an issue in a notebook tho I imagine.