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    GeForce GT 640M vs GeForce GTX 780M

    In this comparison between GeForce GT 640M and GeForce GTX 780M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GT 640M will be the best choice, for others GeForce GTX 780M will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M Check Price
    GeForce GTX 780M Check Price

    GeForce GT 640M and GeForce GTX 780M are Laptop Graphics Cards

    Note: GeForce GT 640M 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 640M or GeForce GTX 780M here:

    GeForce GT 640M Laptops
    GeForce GTX 780M Laptops

    Main Specs

      GeForce GT 640M 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
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    • GeForce GTX 780M has 281% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M 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 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M and GeForce GTX 780M are build with Kepler architecture.
    • GeForce GT 640M 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 640M.

    Game benchmarks

    high / 1080p 0−1 20−22
    ultra / 1080p 0−1 12−14
    QHD / 1440p 0−1 6−7
    4K / 2160p − 5−6
    low / 720p 10−12 40−45
    medium / 1080p 2−3 24−27
    The average gaming FPS of GeForce GTX 780M in Assassin's Creed Odyssey is 466% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M 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 645 MHz 797 MHz
    Transistor count 1,270 million 3,540 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 102.0
    Floating-point performance 480.0 gflops 2,448 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 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) 18 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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