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    GeForce GTX 660M vs GeForce GTX 680MX

    When comparing GeForce GTX 660M and GeForce GTX 680MX, 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 GTX 660M and GeForce GTX 680MX is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GTX 660M Check Price
    GeForce GTX 680MX Check Price

    GeForce GTX 660M and GeForce GTX 680MX are Laptop Graphics Cards

    Note: GeForce GTX 660M and GeForce GTX 680MX 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 GTX 660M or GeForce GTX 680MX here:

    GeForce GTX 660M Laptops
    GeForce GTX 680MX Laptops

    Main Specs

      GeForce GTX 660M GeForce GTX 680MX
    Power consumption (TDP) 50 Watt 122 Watt
    Interface MXM-B (3.0)
    Memory type GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs
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    • GeForce GTX 680MX has 144% more power consumption, than GeForce GTX 660M.
    • GeForce GTX 660M and GeForce GTX 680MX have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GTX 660M and GeForce GTX 680MX are build with Kepler architecture.
    • Core clock speed of GeForce GTX 660M is 115 MHz higher, than GeForce GTX 680MX.
    • GeForce GTX 660M and GeForce GTX 680MX are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GTX 680MX is 500 MHz higher, than GeForce GTX 660M.

    Game benchmarks

    high / 1080p 6−7 21−24
    ultra / 1080p 4−5 12−14
    QHD / 1440p 0−1 7−8
    4K / 2160p − 5−6
    low / 720p 16−18 40−45
    medium / 1080p 8−9 27−30
    The average gaming FPS of GeForce GTX 680MX in Assassin's Creed Odyssey is 188% more, than GeForce GTX 660M.

    Full Specs

      GeForce GTX 660M GeForce GTX 680MX
    Architecture Kepler Kepler
    Code name N13E-GE
    Type Laptop Laptop
    Release date 22 March 2012 23 October 2012
    Pipelines 384 1536
    Core clock speed 835 MHz 720 MHz
    Boost Clock 950 MHz
    Transistor count 1,270 million 3540 Million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 30.4 billion/sec 92.2 billion/sec
    Floating-point performance 729.6 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 2000 MHz 2500 MHz
    Memory bandwidth 64.0 GB/s 160 GB/s
    Shared memory - -
    DirectX 12 API 12 API
    Shader Model 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan 1.1.126
    CUDA + +
    CUDA cores 384 1536
    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 Vision +
    Bitcoin / BTC (SHA256) 36 Mh/s 57 Mh/s
    Laptop size large large
    Optimus + +
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