GPU Battle: GTX 560M vs GT 650M vs GT 640M vs GT 555M

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(to understand what performance you should expect from the GT 650M. read here)

Two midrange gpus have burst into the world in the last two months- the Nvidia GT 640M and GT 650M. They are both based on the Kepler GK107 core which menufactured in a 28nm process and have 384 shader cores and 128 bit memory interface and varies only in the core and memory speed and type.

Generally, the GT 640M offers as high as 20%-25% higher performance compared the previous generation GT 555M  (1, 2) and the GT 650M offers up to 30% higher performance than the GT 640M , judging by reviews and benchmarks (1) and raw power data. Also, the GT 640M delivers averagly 20%-30% less performance (1) than the GTX 560M . This means that the GT 650M is about powerful as the GTX 560M (but it depends on the scenario). The following table shows a sammery of key data of these cores and although you can’t tell what will be the performance, it does help to confirm the performance guesses we have about the GT 650M from too few benchmarks.

Model Core, shaders (vertex / geometry / pixel) memory bandwidth (GB/s) Core speed processing power (GFLOPS)
GT 640M Kepler (GK107), 384 unified : 32 : 16 (625MHZ)28nm process 28.8 (DDR3)
64 (GDDR5)
625MHZ 480
GT 650M Kepler (GK107), 384 unified : 32 : 16shader speed – 850MHZ (DDR3) / 735MHZ (GDDR5)28nm process 28.8 (DDR3)
64 (GDDR5)
850MHZ (DDR3)
735MHZ (GDDR5)
652.8 (DDR3)
564.5 (GDDR5)
GTX 560M Fermi (GF116), 192 unified : 32 : 24 (1550MHZ)40nm process 40 (128 bit interface)60 (192 bit interface) 775MHZ 595.2

As you can see, the GDDR5 version of the GT 650M has a 64GB/s memory bandwidth and 564.5 GFLOPS which is very close to the GTX 560M processing power. Although this data can’t tell it by itself what will be the performance, it does give us a clue about the potentional and, indeed, it matches the benchmarks – the GT 650M comes very close to the GTX 560M and sometimes even surpasses it, like in the case of Skyrim. Also remember that the benchmarks used in current reviews are still old Nvidia drivers and in my opinion the new Kepler might benefit from new drivers.

Here is comparison of some games FPS number from anandtech and notebookcheck. For more numbers and scenarios, check the links.

Settings GTX 560M,I7-2630QM GT 650M 1GB GDDR5,I7-3610QM GT 650M 2GB GDDR5,I7-3720QM GT 650M 2GB DDR3,I7-3720QM
Mass Effect 3 1920×1080, all on, onAA 8xAF ~44 ~46 ~49 ~35
Diablo 3 1920×1080, high, on AA ~44 ~44 ~41
Skyrim 1920×1080 Ultra Preset 8xAA 16xAF ~22 ~24 ~25
Anno 2070 1920×1080 very high onAA 4xAF ~41 ~36 ~36 ~37
BattleField 3 1366×768 high -AA 16xAF ~38 ~30 ~34 ~31
Max Payne 3 1920×1080 Very High, DX11 8xAF Very High FXAA 15 18
Dirt Showdown 1366×768 High Preset AF 2xMSAA 60 56

You see in the table one example when the GT 650M DDR3 version outperform the GDDR5 version. This might be due to a game that  (Anno 2070) needs less memory bandwidth and more processing power, which is the case of the DDR3 version (higher core clock, lower memory bandwidth). However, in most cases you should prefer the GDDR5 version. For more games benchmarks, click on the links to the full reviews.

If you check the numbers on notebookcheck benchmarks, you’ll see games, like Anno 2070, that were testes also with the newest Nvidia drivers – ForceWare 301.34. This doesn’t seem to change the results in that case, but will have to wait to thorough review of the new drivers. One more interesting thing is the use of some OC’ed GT 650M DDR3 version with 950MHZ core clock which makes it faster. The downside is, as always now adays, more heat and higher power consumption.

 

The fact that the raw power of the GT 650M GDDR5 version (which is the faster one) is lower than the GTX560M one, doesn’t mean that it will be slower on real world applications and games – different micro Architectures can be more efficient in a way that makes it better in real world situations depite the raw power, which seems to be also the case here. Moreover, it depends on other factors too, like the cpu and drivers in test.

Taking into account that the GT 640M and GT 650M is menufacured in a 28nm process and should have a lower power consumption than their 40nm competitors from the 5XX Nvidia series and so they should be much more attractive to the laptops market.

Currently, not many laptop equipped with the GT 650M and GT 640M, but in the following months will probably see more and more. HP (GT 650M), Sager (GT 650M), Lenovo (GT 640M)  already have some updated models.

 

So?

Question 1: GT 650M vs GTX 560M?

Answer: In short, with the GT 650M you can pay less to get the same or almost same performance level. You should look for these laptops. However, you better wait for the new laptops to come, with the Ivy Bridge cpu and new gpus from Nvidia or AMD.

 

Question 2: GT 555M vs GT 640M?

Answer: definitely GT 640M, for the same price. The current AMD direct competitor is the 7690M and it’s not faster than the GT 640M,  so in that manner you don’t have to worry. However, you better wait for the whole series of CPUs and GPUs to come out so the prices and laptops will be more competitive.

 

laptops with GT 650M deals

  • Nicolas

    heyy , nice article there !
    I have a question , it would be nice if you could reply:
    i have to buy a laptop and i’m hesitating between

    i5-3210M with GeForce GT 650M : http://www.mediamarkt.nl/mcs/product/ACER-Aspire-V3-771G-53218G1T,10259,350521,547139.html?langId=-11

    or

    i7-3630QM with GeForce GT 640M : http://www.mediamarkt.nl/mcs/product/ACER-Aspire-V3-571G-736B8G50MAII,10259,350521,563867.html?langId=-11

    the site is in dutch , but i hope u can undestand the info

    • I’d go with the I5-3210M + GT 650M – would be better for gaming. both have the 1080p screen. The V3-571G I think have a better, IPS, screen, but I don’t know if it matters to you

      • Nicolas

        alright , thx for replying ^^

  • matti

    If you consider the turbo boost, the 650m gddt5 runs @835Mhz

  • please tell me which laptop will be good in terms of price and high speed performance. I wish to play games like assassins creed iii, halo 4, call of duty black ops ii, crysis 3…..

    option-i) core i7-3610m ,4gb ram, 1tb hdd, 2gb amd hd7730m, 15.6 inch screen, rs.55000

    option-ii) core i7-3610m, 4gb ram, 1tb hdd, 2gb nvidia gt640m, 14 inch screen, rs.55000

    option-iii) core i5-3210m, 4gb ram,1 tb hdd, 2gb nvidia gt650m, 17.3 inch screen, rs.65000

    • the last one with the GT 650M, but it also costs much more. Does it have 1080p screen?

      • it does not have 1080p screen , the screen resolution is 1600*900, also please tell me which is more price worth, further GT650M is better than HD7730M but at the same time the processor are different with core i5 and core i7 respectively. So kindly suggest

        • I would take the GT 650M + I5 for gaming, but what are the full models? do you have links?

  • Bobby

    Great article!
    Just a question.I am chosing a laptop and I have stopped on these three:
    i5-3210M with 640M 2gb vram
    i7-2670QM with 630M 2gb vram
    i7-3612QM with AMD Radeon HD 7670M 2gb vram
    All of them have the same amount of ram(6GB).Which one will perform the best in gaming and will the i5 slow down when multitasking?(ex. I am playing something then I alt+tab and open the internet and start browsing.)?

    • the one with the GT 640M will the best.
      The alt-tab thing also depends on other factors

      do you have a budget? specific games?

  • Nice…

  • David Homan

    Thank you very much! Very useful article!

    • junky

      thanks mate