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    GeForce GT 645M vs GeForce GT 750M

    If you are going to buy a new graphics card and are choosing between GeForce GT 645M and GeForce GT 750M, 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 645M stacks up against GeForce GT 750M, check out specs charts below.
    GeForce GT 645M Check Price
    GeForce GT 750M Check Price

    GeForce GT 645M and GeForce GT 750M are Laptop Graphics Cards

    Note: GeForce GT 645M and GeForce GT 750M 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 645M or GeForce GT 750M here:

    GeForce GT 645M Laptops
    GeForce GT 750M Laptops

    Main Specs

      GeForce GT 645M GeForce GT 750M
    Power consumption (TDP) 32 Watt 50 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Memory type DDR3\GDDR5 DDR3
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 750M has 56% more power consumption, than GeForce GT 645M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • GeForce GT 750M has 2 GB more memory, than GeForce GT 645M.
    • Both cards are used in Laptops.
    • GeForce GT 645M and GeForce GT 750M are build with Kepler architecture.
    • GeForce GT 645M and GeForce GT 750M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 750M is 200 MHz higher, than GeForce GT 645M.

    Game benchmarks

    high / 1080p 1−2 5−6
    ultra / 1080p 0−1 2−3
    QHD / 1440p 0−1 2−3
    low / 720p 12−14 16−18
    medium / 1080p 2−3 7−8
    The average gaming FPS of GeForce GT 750M in Assassin's Creed Odyssey is 100% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M GeForce GT 750M
    Architecture Kepler Kepler
    Code name N13P-GS N14P-GT
    Type Laptop Laptop
    Release date 22 March 2012 1 April 2013
    Pipelines 384 384
    Core clock speed 967 MHz
    Boost Clock 967 MHz
    Transistor count 1,270 million 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 30.94
    Floating-point performance 544.5 gflops 742.7 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 MHz 2000 - 5000 MHz
    Memory bandwidth 64.19 GB/s
    Shared memory - -
    DirectX 12 API 12 API
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 27 Mh/s
    Laptop size medium sized medium sized
    Standard memory configuration DDR3/GDDR5
    eDP 1.2 signal support Up to 3840x2160
    LVDS signal support Up to 1920x1200
    DisplayPort Multimode (DP++) support Up to 3840x2160
    HDCP content protection +
    7.1 channel HD audio on HDMI +
    TrueHD and DTS-HD audio bitstreaming +
    H.264, VC1, MPEG2 1080p video decoder +
    Optimus + +
    Blu-Ray 3D Support +
    3D Vision / 3DTV Play +
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