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    GeForce 940M vs GeForce GTX 660

    If you are going to buy a new graphics card and are choosing between GeForce 940M and GeForce GTX 660, 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 940M stacks up against GeForce GTX 660, check out specs charts below.
    GeForce 940M Check Price
    GeForce GTX 660 Check Price

    GeForce 940M is a Laptop Graphics Card

    Note: GeForce 940M 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 940M here:

    GeForce 940M Laptops

    Main Specs

      GeForce 940M GeForce GTX 660
    Power consumption (TDP) 75 Watt 140 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Supplementary power connectors One 6-pin
    Memory type DDR3 GDDR5
    Maximum RAM amount 4 GB 2 GB
    Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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    • GeForce GTX 660 has 86% more power consumption, than GeForce 940M.
    • GeForce 940M is connected by PCIe 3.0 x8, and GeForce GTX 660 uses PCIe 3.0 x16 interface.
    • GeForce 940M has 2 GB more memory, than GeForce GTX 660.
    • GeForce 940M is used in Laptops, and GeForce GTX 660 - in Desktops.
    • GeForce 940M is build with Maxwell architecture, and GeForce GTX 660 - with Kepler.
    • Core clock speed of GeForce 940M is 92 MHz higher, than GeForce GTX 660.
    • GeForce 940M and GeForce GTX 660 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 940M is 1994 MHz higher, than GeForce GTX 660.

    Game benchmarks

    high / 1080p 2−3 20−22
    ultra / 1080p 1−2 12−14
    QHD / 1440p 0−1 6−7
    4K / 2160p − 5−6
    low / 720p 12−14 40−45
    medium / 1080p 4−5 24−27
    The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 400% more, than GeForce 940M.

    Full Specs

      GeForce 940M GeForce GTX 660
    Architecture Maxwell Kepler
    Code name N16S-GT-S/B GK106
    Type Laptop Desktop
    Release date 12 March 2015 6 September 2012
    Pipelines 384 960
    Core clock speed 1072 MHz 980 MHz
    Boost Clock 1176 MHz 1033 MHz
    Transistor count 1,870 million 2,540 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.22 78.4 billion/sec
    Floating-point performance 903.2 gflops 1,981 gflops
    Length 9.5" (24.1 cm)
    Memory bus width 64 Bit 192-bit GDDR5
    Memory clock speed 2000 MHz 6.0 GB/s
    Memory bandwidth 14.4 GB/s 144.2 GB/s
    Shared memory -
    DirectX 12 (11_0) 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.3
    OpenCL 1.2 1.2
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 960
    Bus support PCI Express 3.0 PCI Express 3.0
    Height 4.376" (11.1 cm)
    SLI options +
    Multi monitor support 4 displays
    HDMI +
    HDCP +
    Maximum VGA resolution 2048x1536
    Audio input for HDMI Internal
    3D Blu-Ray +
    3D Gaming +
    3D Vision +
    Bitcoin / BTC (SHA256) 101 Mh/s 66 Mh/s
    Laptop size medium sized
    Optimus +
    GPU Boost 2.0
    GameWorks +
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