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Nvidia GT 650m vs GTX 660m Confusion

Last response: in Graphics & Displays
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September 10, 2012 3:05:57 PM

First, I appologize if this belongs in the laptop section rather than the Graphics Card section. My question: I was wondering how much of a disadvantage the less expensive GT 650m would be compared to the more expensive GTX 660m?

Nvidia's specs for the two GPUs seem to be very similar, sometimes even favoring the GT 650m. And, yes, I realize the "up to" statement in the GT 650m's clock specs makes it suspect. Maybe someone could shed some light on what the actual clock speed is for the 650m and why "up to" is even used. Thank you.

GT 650m
384 cores
Up to 900 MHz
128bit mem
Up to 80.0 GB/sec
GDDR5

GTX 660m
384 cores
835 MHz
128bit mem
64.0 GB/sec
GDDR5

Best solution

a b U Graphics card
September 10, 2012 5:20:42 PM

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
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September 10, 2012 7:04:17 PM

vitornob said:
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.
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September 17, 2012 1:32:36 AM

Best answer selected by box o rocks.
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September 17, 2012 1:36:17 AM

box o rocks said:
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.


Well you sure can! Just make sure you get a decent notebook cooler before doing so...what laptop was this?
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March 27, 2013 1:55:37 AM

The NVIDIA GT 650M has been recently redesigned by NVIDIA to actually outperform the NVIDIA GTX 660m. The redesign is most notably used in the Macbook Pro Retina which uses 900mhz KUDA cores with GDDR5 memory. So now yes the lastest implementation of the gt650m is now better than the current gtx 660m.

My source for this is shown on the NVIDIA website regarding the geforce models and a review by the well reputed anandtech. http://www.anandtech.com/show/6023/the-nextgen-macbook-...
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