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    GeForce GT 645M vs GeForce GTX 780M

    When choosing between GeForce GT 645M and GeForce GTX 780M, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 645M and GeForce GTX 780M.
    GeForce GT 645M Check Price
    GeForce GTX 780M Check Price

    GeForce GT 645M and GeForce GTX 780M are Laptop Graphics Cards

    Note: GeForce GT 645M and GeForce GTX 780M 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 GTX 780M here:

    GeForce GT 645M Laptops
    GeForce GTX 780M Laptops

    Main Specs

      GeForce GT 645M GeForce GTX 780M
    Power consumption (TDP) 32 Watt 122 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
      Check Price Check Price
    • GeForce GTX 780M has 281% more power consumption, than GeForce GT 645M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 780M uses MXM-B (3.0) interface.
    • GeForce GTX 780M has 2 GB more memory, than GeForce GT 645M.
    • Both cards are used in Laptops.
    • GeForce GT 645M and GeForce GTX 780M are build with Kepler architecture.
    • GeForce GT 645M and GeForce GTX 780M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 780M is 700 MHz higher, than GeForce GT 645M.

    Game benchmarks

    high / 1080p 1−2 20−22
    ultra / 1080p 0−1 12−14
    QHD / 1440p 0−1 6−7
    4K / 2160p − 5−6
    low / 720p 12−14 40−45
    medium / 1080p 2−3 24−27
    The average gaming FPS of GeForce GTX 780M in Assassin's Creed Odyssey is 480% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M GeForce GTX 780M
    Architecture Kepler Kepler
    Code name N13P-GS N14E-GTX
    Type Laptop Laptop
    Release date 22 March 2012 30 May 2013
    Pipelines 384 1536
    Core clock speed 823 MHz
    Boost Clock 797 MHz
    Transistor count 1,270 million 3,540 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 102.0
    Floating-point performance 544.5 gflops 2,448 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 MHz 2500 MHz
    Memory bandwidth 160.0 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 1536
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0, PCI Express 2.0
    SLI options +
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 82 Mh/s
    Laptop size medium sized large
    Standard memory configuration 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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