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    GeForce GT 640 vs GeForce GTX 860M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640 and GeForce GTX 860M, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 640 stacks up against GeForce GTX 860M, check out specs charts below.
    GeForce GT 640 Check Price
    GeForce GTX 860M Check Price

    GeForce GTX 860M is a Laptop Graphics Card

    Note: GeForce GTX 860M is only used in laptop graphics. It has 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 GTX 860M here:

    GeForce GTX 860M Laptops

    Main Specs

      GeForce GT 640 GeForce GTX 860M
    Power consumption (TDP) 65 Watt 75 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort No outputs
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    • GeForce GTX 860M has 15% more power consumption, than GeForce GT 640.
    • GeForce GT 640 is connected by PCIe 3.0 x16, and GeForce GTX 860M uses MXM-B (3.0) interface.
    • GeForce GTX 860M has 2 GB more memory, than GeForce GT 640.
    • GeForce GT 640 is used in Desktops, and GeForce GTX 860M - in Laptops.
    • GeForce GT 640 is build with Kepler architecture, and GeForce GTX 860M - with Maxwell.
    • Core clock speed of GeForce GT 640 is 105 MHz higher, than GeForce GTX 860M.
    • GeForce GT 640 and GeForce GTX 860M are manufactured by 28 nm process technology.

    Game benchmarks

    high / 1080p 2−3 16−18
    ultra / 1080p 1−2 10−11
    QHD / 1440p 0−1 5−6
    4K / 2160p − 4−5
    low / 720p 14−16 30−35
    medium / 1080p 5−6 21−24
    The average gaming FPS of GeForce GTX 860M in Assassin's Creed Odyssey is 233% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 GeForce GTX 860M
    Architecture Kepler Maxwell
    Code name GK107 N15P-GX
    Type Desktop Laptop
    Release date 5 June 2012 12 March 2014
    Pipelines 384 640
    Core clock speed 902 MHz 797 MHz
    Boost Clock 915 MHz
    Transistor count 1,270 million 1,870 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.86 43.40
    Floating-point performance 692.7 gflops 1,389 gflops
    Length 145 mm
    Memory bus width 128 Bit 128 Bit
    Memory clock speed 1782 MHz
    Memory bandwidth 28.51 GB/s 80.0 GB/s
    Shared memory -
    DirectX 12 (11_0) 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.6 4.5
    OpenCL 1.2 1.1
    Vulkan 1.1.126 1.1.126
    CUDA 3.0 +
    CUDA cores 1152 or 640
    Bus support PCI Express 2.0, PCI Express 3.0
    SLI options +
    HDMI +
    Bitcoin / BTC (SHA256) 24 Mh/s 163 Mh/s
    Laptop size medium sized
    Standard memory configuration GDDR5
    eDP 1.2 signal support Up to 3840x2160
    LVDS signal support Up to 1920x1200
    DisplayPort Multimode (DP++) support Up to 3840x2160
    HDCP content protection +
    7.1 channel HD audio on HDMI +
    TrueHD and DTS-HD audio bitstreaming +
    H.264, VC1, MPEG2 1080p video decoder +
    Optimus +
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