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    GeForce 940MX vs GeForce GT 640M LE

    When choosing between GeForce 940MX and GeForce GT 640M LE, 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 940MX and GeForce GT 640M LE.
    GeForce 940MX Check Price
    GeForce GT 640M LE Check Price

    GeForce 940MX and GeForce GT 640M LE are Laptop Graphics Cards

    Note: GeForce 940MX and GeForce GT 640M LE 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 940MX or GeForce GT 640M LE here:

    GeForce 940MX Laptops
    GeForce GT 640M LE Laptops

    Main Specs

      GeForce 940MX GeForce GT 640M LE
    Power consumption (TDP) 23 Watt 20 Watt
    Interface PCIe 3.0 x8 PCIe 2.0 x16
    Supplementary power connectors None
    Memory type DDR3, GDDR5 DDR3\DDR5
    Maximum RAM amount 4 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce 940MX has 15% more power consumption, than GeForce GT 640M LE.
    • GeForce 940MX is connected by PCIe 3.0 x8, and GeForce GT 640M LE uses PCIe 2.0 x16 interface.
    • GeForce 940MX has 2 GB more memory, than GeForce GT 640M LE.
    • Both cards are used in Laptops.
    • GeForce 940MX is build with Maxwell architecture, and GeForce GT 640M LE - with Fermi / Kepler.
    • GeForce 940MX and GeForce GT 640M LE are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 940MX is 2200 MHz higher, than GeForce GT 640M LE.

    Game benchmarks

    high / 1080p 7−8 0−1
    ultra / 1080p 4−5 −
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 1−2
    medium / 1080p 8−9 0−1
    The average gaming FPS of GeForce 940MX in Assassin's Creed Odyssey is 1600% more, than GeForce GT 640M LE.

    Full Specs

      GeForce 940MX GeForce GT 640M LE
    Architecture Maxwell Fermi / Kepler
    Code name N16S-GTR-B/S N13P-LP
    Type Laptop Laptop
    Release date 10 March 2016 22 March 2012
    Pipelines 384 384
    Core clock speed 1122 MHz
    Boost Clock 1242 MHz
    Transistor count 1,870 million 585 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 23.83
    Floating-point performance 762.6 gflops 384.0 gflops
    Memory bus width 64 Bit 128bit
    Memory clock speed 4000 MHz 1800 - 4000 MHz
    Memory bandwidth 40.1 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 N/A
    CUDA + +
    CUDA cores Up to 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) 102 Mh/s 14 Mh/s
    Laptop size medium sized medium sized
    Optimus + +
    GPU Boost 2.0
    GameWorks +
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