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    GeForce GT 640M vs GeForce GTX 970M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and GeForce GTX 970M, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 640M stacks up against GeForce GTX 970M, check out specs charts below.
    GeForce GT 640M Check Price
    GeForce GTX 970M Check Price

    GeForce GT 640M and GeForce GTX 970M are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GTX 970M are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GT 640M or GeForce GTX 970M here:

    GeForce GT 640M Laptops
    GeForce GTX 970M Laptops

    Main Specs

      GeForce GT 640M GeForce GTX 970M
    Power consumption (TDP) 32 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 6 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M is connected by PCIe 3.0 x16, and GeForce GTX 970M uses MXM-B (3.0) interface.
    • GeForce GTX 970M has 4 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and GeForce GTX 970M - with Maxwell.
    • GeForce GT 640M and GeForce GTX 970M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 970M is 700 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 35−40
    ultra / 1080p 0−1 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 10−12 60−65
    medium / 1080p 2−3 40−45
    The average gaming FPS of GeForce GTX 970M in Assassin's Creed Odyssey is 766% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GTX 970M
    Architecture Kepler Maxwell
    Code name N13P-GS GM204
    Type Laptop Laptop
    Release date 22 March 2012 7 October 2014
    Pipelines 384 1280
    Core clock speed 924 MHz
    Boost Clock 645 MHz 1038 MHz
    Transistor count 1,270 million 5,200 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 83.04
    Floating-point performance 480.0 gflops 2,657 gflops
    Memory bus width 128bit 192 Bit
    Memory clock speed 1800 - 4000 MHz 2500 MHz
    Memory bandwidth 120 GB/s
    Shared memory - -
    G-SYNC support +
    DirectX 12 API 12 (12_1)
    Shader Model 5.1 6.4
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 384 1280
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0
    SLI options +
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s 314 Mh/s
    Laptop size medium sized large
    DisplayPort Multimode (DP++) support +
    H.264, VC1, MPEG2 1080p video decoder +
    Optimus + +
    GameStream +
    GeForce ShadowPlay +
    GPU Boost 2.0
    GameWorks +
    BatteryBoost +
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