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    GeForce GT 640M vs GeForce GTX 680MX

    In this comparison between GeForce GT 640M and GeForce GTX 680MX 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 680MX will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M Check Price
    GeForce GTX 680MX Check Price

    GeForce GT 640M and GeForce GTX 680MX are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GTX 680MX 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 680MX here:

    GeForce GT 640M Laptops
    GeForce GTX 680MX Laptops

    Main Specs

      GeForce GT 640M GeForce GTX 680MX
    Power consumption (TDP) 32 Watt 122 Watt
    Interface PCIe 3.0 x16
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs
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    • GeForce GTX 680MX has 281% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M and GeForce GTX 680MX have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M and GeForce GTX 680MX are build with Kepler architecture.
    • GeForce GT 640M and GeForce GTX 680MX are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 680MX is 700 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 21−24
    ultra / 1080p 0−1 12−14
    QHD / 1440p 0−1 7−8
    4K / 2160p − 5−6
    low / 720p 10−12 40−45
    medium / 1080p 2−3 27−30
    The average gaming FPS of GeForce GTX 680MX in Assassin's Creed Odyssey is 483% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GTX 680MX
    Architecture Kepler Kepler
    Code name N13P-GS
    Type Laptop Laptop
    Release date 22 March 2012 23 October 2012
    Pipelines 384 1536
    Core clock speed 720 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 3540 Million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 92.2 billion/sec
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz 2500 MHz
    Memory bandwidth 160 GB/s
    Shared memory - -
    DirectX 12 API 12 API
    Shader Model 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan 1.1.126
    CUDA + +
    CUDA cores 384 1536
    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 +
    3D Vision +
    Bitcoin / BTC (SHA256) 18 Mh/s 57 Mh/s
    Laptop size medium sized large
    Optimus + +
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