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The main differences between desktop and mobility cards.

post #1 of 4
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I have been curious for quit some time now on the differences between the two.

Assuming two computers are identical in every aspect, but one is a laptop with a gtx570m and the other is a desktop with a gtx570...

I would assume that the gtx570m would have less performance compared to a standard gtx570.

With this in mind, and if my assumption is correct, what exactly is usually the percentage difference, when looking at performance, between a mobility card and a standard desktop card?
    
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post #2 of 4
They name them the way they do for marketing reasons only. nVidia, for example, calls their fastest desktop card a 580 GTX, so they want to call their fastest mobile card the same thing, even though their performance is not the same.

For example, my 260m GTX I had in my Asus G72 was comparable to a desktop 9800GT because they shared the same architecture (the G92 core I believe). You can usually find out which core the mobile card is based on, and trace it back to the desktop version. They modify the desktop version to use less power, so they usually downclock the core and RAM speeds.

Here's a good list of all mobile GPUs. You can compare their benchmark scores to the desktop equivalent.

http://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html
Edited by Tobuk - 10/17/11 at 1:36pm
post #3 of 4
Quote:
Originally Posted by Tobuk;15344956 
They name them the way they do for marketing reasons only. nVidia, for example, calls their fastest desktop card a 580 GTX, so they want to call their fastest mobile card the same thing, even though their performance is not the same.

For example, my 260m GTX I had in my Asus G72 was comparable to a desktop 9800GT. You can usually find out which core the mobile card is based on, and trace it back to the desktop version. They modify the desktop version to use less power, so they usually downclock the core and RAM speeds.

This is correct.

In reality, the mobile version of a desktop card which it's named after bares little resemblance to it. They almost always have fewer stream processors or APUs and lower clocks.
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post #4 of 4
Unless I'm mistaken the fastest mobile NV GPU is basically a underclocked 460, so that ought to give you an idea for those two parts (the 580m to the 580), but in general there is no way to directly compare them other than to know the amount of shaders and clocks etc.
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