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    GeForce 940M vs GeForce GT 640M

    When comparing GeForce 940M and GeForce GT 640M, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce 940M and GeForce GT 640M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce 940M Check Price
    GeForce GT 640M Check Price

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

    Note: GeForce 940M 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 940M or GeForce GT 640M here:

    GeForce 940M Laptops
    GeForce GT 640M Laptops

    Main Specs

      GeForce 940M GeForce GT 640M
    Power consumption (TDP) 75 Watt 32 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Memory type DDR3 DDR3\GDDR5
    Maximum RAM amount 4 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce 940M has 134% more power consumption, than GeForce GT 640M.
    • GeForce 940M is connected by PCIe 3.0 x8, and GeForce GT 640M uses PCIe 3.0 x16 interface.
    • GeForce 940M has 2 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce 940M is build with Maxwell architecture, and GeForce GT 640M - with Kepler.
    • GeForce 940M and GeForce GT 640M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 940M is 200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 2−3 0−1
    ultra / 1080p 1−2 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 10−12
    medium / 1080p 4−5 2−3
    The average gaming FPS of GeForce 940M in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.

    Full Specs

      GeForce 940M GeForce GT 640M
    Architecture Maxwell Kepler
    Code name N16S-GT-S/B N13P-GS
    Type Laptop Laptop
    Release date 12 March 2015 22 March 2012
    Pipelines 384 384
    Core clock speed 1072 MHz
    Boost Clock 1176 MHz 645 MHz
    Transistor count 1,870 million 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.22
    Floating-point performance 903.2 gflops 480.0 gflops
    Memory bus width 64 Bit 128bit
    Memory clock speed 2000 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) 101 Mh/s 18 Mh/s
    Laptop size medium sized medium sized
    Optimus + +
    GPU Boost 2.0
    GameWorks +
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