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    GeForce 920MX vs GeForce GT 640M

    In this comparison between GeForce 920MX and GeForce GT 640M 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 920MX will be the best choice, for others GeForce GT 640M will be their preference. Study the comparison tables below and make your choice.
    GeForce 920MX Check Price
    GeForce GT 640M Check Price

    GeForce 920MX and GeForce GT 640M are Laptop Graphics Cards

    Note: GeForce 920MX and GeForce GT 640M 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 920MX or GeForce GT 640M here:

    GeForce 920MX Laptops
    GeForce GT 640M Laptops

    Main Specs

      GeForce 920MX GeForce GT 640M
    Power consumption (TDP) 16 Watt 32 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3, GDDR5 DDR3\GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M has 100% more power consumption, than GeForce 920MX.
    • GeForce 920MX is connected by PCIe 3.0 x8, and GeForce GT 640M uses PCIe 3.0 x16 interface.
    • GeForce 920MX and GeForce GT 640M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce 920MX is build with Maxwell architecture, and GeForce GT 640M - with Kepler.
    • GeForce 920MX and GeForce GT 640M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 920MX and GeForce GT 640M is 1800 MHz.

    Game benchmarks

    high / 1080p 2−3 0−1
    ultra / 1080p 0−1 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 10−12
    medium / 1080p 3−4 2−3
    The average gaming FPS of GeForce 920MX in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.

    Full Specs

      GeForce 920MX GeForce GT 640M
    Architecture Maxwell Kepler
    Code name N16V-GMR N13P-GS
    Type Laptop Laptop
    Release date 25 March 2015 22 March 2012
    Pipelines 256 384
    Core clock speed 965 MHz
    Boost Clock 993 MHz 645 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 23.83
    Floating-point performance 602.1 gflops 480.0 gflops
    Memory bus width 64 Bit 128bit
    Memory clock speed 1800 MHz 1800 - 4000 MHz
    Memory bandwidth 14.4 GB/s
    Shared memory - -
    DirectX 12 (11_0) 12 API
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.2 1.1
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 3.0 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
    Optimus + +
    GPU Boost 2.0
    GameWorks +
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