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    GeForce GT 640M vs GeForce GT 750M SLI

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and GeForce GT 750M SLI, 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 GT 750M SLI, check out specs charts below.
    GeForce GT 640M Check Price
    GeForce GT 750M SLI Check Price

    GeForce GT 640M and GeForce GT 750M SLI are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GT 750M SLI 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 GT 750M SLI here:

    GeForce GT 640M Laptops
    GeForce GT 750M SLI Laptops

    Main Specs

      GeForce GT 640M GeForce GT 750M SLI
    Power consumption (TDP) 32 Watt
    Interface PCIe 3.0 x16
    Memory type DDR3\GDDR5 DDR3, GDDR5
    Maximum RAM amount 2 GB 2x 2 GB
    Display Connectors No outputs
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    • GeForce GT 640M and GeForce GT 750M SLI have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M and GeForce GT 750M SLI are build with Kepler architecture.
    • GeForce GT 640M and GeForce GT 750M SLI are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 750M SLI is 200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 14−16
    ultra / 1080p 0−1 8−9
    QHD / 1440p 0−1 3−4
    low / 720p 10−12 30−33
    medium / 1080p 2−3 18−20
    The average gaming FPS of GeForce GT 750M SLI in Assassin's Creed Odyssey is 316% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GT 750M SLI
    Architecture Kepler Kepler
    Code name N13P-GS N14P-GT
    Type Laptop Laptop
    Release date 22 March 2012 1 April 2013
    Pipelines 384 768
    Core clock speed 967 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 1300 Million
    Manufacturing process technology 28 nm 28 nm
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 2x 128 Bit
    Memory clock speed 1800 - 4000 MHz 2000 - 5000 MHz
    Shared memory - -
    DirectX 12 API DirectX 11, Shader 5.0
    Shader Model 5.1
    OpenGL 4.5
    OpenCL 1.1
    Vulkan 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s
    Laptop size medium sized large
    Optimus +
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