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    GeForce GT 640 vs GeForce GTX 680M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640 and GeForce GTX 680M, 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 680M, check out specs charts below.
    GeForce GT 640 Check Price
    GeForce GTX 680M Check Price

    GeForce GTX 680M is a Laptop Graphics Card

    Note: GeForce GTX 680M 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 680M here:

    GeForce GTX 680M Laptops

    Main Specs

      GeForce GT 640 GeForce GTX 680M
    Power consumption (TDP) 65 Watt 100 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 680M has 53% more power consumption, than GeForce GT 640.
    • GeForce GT 640 is connected by PCIe 3.0 x16, and GeForce GTX 680M uses MXM-B (3.0) interface.
    • GeForce GTX 680M has 2 GB more memory, than GeForce GT 640.
    • GeForce GT 640 is used in Desktops, and GeForce GTX 680M - in Laptops.
    • GeForce GT 640 and GeForce GTX 680M are build with Kepler architecture.
    • Core clock speed of GeForce GT 640 is 182 MHz higher, than GeForce GTX 680M.
    • GeForce GT 640 and GeForce GTX 680M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 680M is 18 MHz higher, than GeForce GT 640.

    Game benchmarks

    high / 1080p 2−3 16−18
    ultra / 1080p 1−2 9−10
    QHD / 1440p 0−1 4−5
    4K / 2160p − 4−5
    low / 720p 14−16 30−35
    medium / 1080p 5−6 20−22
    The average gaming FPS of GeForce GTX 680M in Assassin's Creed Odyssey is 233% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 GeForce GTX 680M
    Architecture Kepler Kepler
    Code name GK107 N13E-GTX
    Type Desktop Laptop
    Release date 5 June 2012 4 June 2012
    Pipelines 384 1344
    Core clock speed 902 MHz 720 MHz
    Boost Clock 758 MHz
    Transistor count 1,270 million 3,540 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.86 80.6 billion/sec
    Floating-point performance 692.7 gflops 2,038 gflops
    Length 145 mm
    Memory bus width 128 Bit 256 Bit
    Memory clock speed 1782 MHz 1800 MHz
    Memory bandwidth 28.51 GB/s 115.2 GB/s
    Shared memory -
    DirectX 12 (11_0) 12 API
    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 1344
    Bus support PCI Express 3.0
    SLI options +
    Bitcoin / BTC (SHA256) 24 Mh/s 100 Mh/s
    Laptop size large
    Optimus +
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