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    GeForce GT 640M vs GeForce GTX 950M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and GeForce GTX 950M, 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 640M stacks up against GeForce GTX 950M, check out specs charts below.
    GeForce GT 640M Check Price
    GeForce GTX 950M Check Price

    GeForce GT 640M and GeForce GTX 950M are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GTX 950M 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 950M here:

    GeForce GT 640M Laptops
    GeForce GTX 950M Laptops

    Main Specs

      GeForce GT 640M GeForce GTX 950M
    Power consumption (TDP) 32 Watt 75 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x8
    Memory type DDR3\GDDR5 DDR3 or GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • GeForce GTX 950M has 134% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and GeForce GTX 950M uses PCIe 3.0 x8 interface.
    • GeForce GTX 950M has 2 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and GeForce GTX 950M - with Maxwell.
    • GeForce GT 640M and GeForce GTX 950M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 640M is 800 MHz higher, than GeForce GTX 950M.

    Game benchmarks

    high / 1080p 0−1 12−14
    ultra / 1080p 0−1 8−9
    QHD / 1440p 0−1 2−3
    low / 720p 10−12 27−30
    medium / 1080p 2−3 16−18
    The average gaming FPS of GeForce GTX 950M in Assassin's Creed Odyssey is 266% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GTX 950M
    Architecture Kepler Maxwell
    Code name N13P-GS N16P-GT
    Type Laptop Laptop
    Release date 22 March 2012 12 March 2015
    Pipelines 384 640
    Core clock speed 914 MHz
    Boost Clock 645 MHz 1124 MHz
    Transistor count 1,270 million 1,870 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 44.96
    Floating-point performance 480.0 gflops 1,439 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 - 4000 MHz 1000 or 2500 MHz
    Memory bandwidth 32 or 80 GB/s
    Shared memory - -
    DirectX 12 API 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.2
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 384 640
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0
    SLI options +
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s 140 Mh/s
    Laptop size medium sized medium sized
    DisplayPort Multimode (DP++) support +
    H.264, VC1, MPEG2 1080p video decoder +
    Optimus + +
    Ethereum / ETH (DaggerHashimoto) 2.5 Mh/s
    GameStream +
    GeForce ShadowPlay +
    GPU Boost 2.0
    GameWorks +
    BatteryBoost +
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