Nvidia GeForce GT640M Mobile GPU Review

By on March 20, 2012
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Finally, a “mid-range” mobile GPU capable of big numbers.

Good: Can play all modern DX11 games, Most games can be run at high settings with playable frame rates
Bad: Pushing beyond 1366x768 would mean lowering detail settings to low for playable frame rates
Price: AED 2,800 to AED 4,000 (Full laptop price)
* The price is the Suggested Retail Price at the time of review. Please call a retailer to confirm the latest price for this product.

Mobile Graphics Cards

When it comes to mobile graphics cards, one cannot, and should not, accept desktop level performance. Even the highest-end mobile graphics card can barely touch mid-range desktop cards. So when Nvidia, or even AMD for that matter, come out with a new iteration of their mobile GPUs, the PC enthusiast community is a bit skeptical as to how “powerful” these cards can really be.

But let’s be honest, if you’re planning to spend under $1000 (AED 3,700) on a notebook, then you shouldn’t exactly expect anything mind-blowing. In fact, you should temper your expectations to an incredible low to be amazed by a mobile GPU’s performance. Gaming at 1080p or above resolutions with all effects on high and getting at least 60 fps on a notebook is like expecting a Honda Civic to go up against a Porsche Panamera. So huge is the difference between notebook and desktop gaming.

Coming back to more humble grounds, when looking at notebook gaming, anything at medium to high settings with 30+ fps is a blessing if your laptop doesn’t cost over $1k. In fact, even up till last year this has been pretty much impossible on new games. Everyone knows that to have a “gaming laptop” means a big bulky 4kg monstrosity that makes too much noise and gets too hot to be able to use on laps. And let’s not even get into the fact that these machines cost well in excess of $1,500 (AED 5,800).

But what if I told you, that now you can have a laptop for $800 (AED 3,100) that is not only slim, as close as it can get to ultrabooks with an integrated optical drive, but also has a discrete graphics card that can play the latest DX11 games? And I’m not just talking about simply running these games at low settings to be able to run them for the heck of it, but running them well enough to have settings turn on to high and get well above 30 fps and much more. Enter the Nvidia GeForce GT640M.

Kepler Mobile

The GeForce GT640M is based on the new 28nm Kepler architecture, that promises to outdo its predecessor by a huge margin, while costing the same. The Kepler architecture by merit provides a cooler and more power-efficient chip than the Fermi based GT540M (and any other 500M series GPUs). And while the core clock and memory speeds haven’t seen much of a bump, the CUDA cores on the GT640M come to 384 units. That’s literally 4 times as much as 96 CUDA cores on the GT540M! However, to keep the costs down, Nvidia continues using GDDR3 memory and bus bandwidth of 128-bit.

The review unit we received was the Acer Timeline Ultra M3 with an Intel Core i5-2467M (@ 1.6GHz), 4GB DDR3 RAM, 20GB SSD + 500GB HDD, and the GeForce GT 640M powered a 15-inch screen with a resolution of 1366×768.

Now one thing to keep in mind is that this time all the GeForce 600M line GPUs will have Nvidia Optimus, so expect great battery life across the board in every laptop carrying these cards. Our own Acer Timeline Ultra M3 was rated at an 8 hour battery life. I personally clocked in just less than 6 hours of regular usage (browsing and HD YouTube videos and listening to MP3s) after having played Skyrim for about 40 minutes.

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From auditing to editing, I now test and analyze the latest gadgets and games instead of the latest financial statements. Both jobs are equally intense and rewarding. When I'm not burning up hardware in the name of science, you'll find me nuking in DOTA 2 or engineering in TF2.

  • Fahad Tariq

    What about the heat produced? On paper, GT540m is supposed to have great performance but most of the laptops with that card didn’t due to major heat issues and ultimately, too many system crashes.

  • cmorticum

    How big is the 640M’s penis?

  • Peoples

    Will I be able to buy this then whack it in my laptop?

    • lollo


  • pop59

    @ cmortium i 640m dont have a big penis, but you just take a look of the balls , wooooow ;-)

  • lollo

    Sounds like a pritty good laptop gpu

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