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    GeForce GT 640M vs GeForce GTX 860M SLI

    In this comparison between GeForce GT 640M and GeForce GTX 860M SLI 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 860M SLI will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M Check Price
    GeForce GTX 860M SLI Check Price

    GeForce GT 640M and GeForce GTX 860M SLI are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GTX 860M SLI 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 860M SLI here:

    GeForce GT 640M Laptops
    GeForce GTX 860M SLI Laptops

    Main Specs

      GeForce GT 640M GeForce GTX 860M SLI
    Power consumption (TDP) 32 Watt 120 Watt
    Interface PCIe 3.0 x16
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 2x 4 GB
    Display Connectors No outputs
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    • GeForce GTX 860M SLI has 275% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M and GeForce GTX 860M SLI have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and GeForce GTX 860M SLI - with Maxwell.
    • GeForce GT 640M and GeForce GTX 860M SLI are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 860M SLI is 3200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 21−24
    ultra / 1080p 0−1 14−16
    QHD / 1440p 0−1 8−9
    4K / 2160p − 5−6
    low / 720p 10−12 40−45
    medium / 1080p 2−3 27−30
    The average gaming FPS of GeForce GTX 860M SLI in Assassin's Creed Odyssey is 483% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GTX 860M SLI
    Architecture Kepler Maxwell
    Code name N13P-GS
    Type Laptop Laptop
    Release date 22 March 2012 12 March 2014
    Pipelines 384 1280
    Core clock speed 1029 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 2x 1870 Million
    Manufacturing process technology 28 nm 28 nm
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 2x 128 Bit
    Memory clock speed 1800 - 4000 MHz 5000 MHz
    Shared memory - -
    DirectX 12 API DirectX 12 (FL 11_0), Shader 5.0
    Shader Model 5.1
    OpenGL 4.5
    OpenCL 1.1
    Vulkan 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    SLI options +
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s
    Laptop size medium sized large
    Optimus + +
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