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    GeForce GT 640 vs Maxwell GPU Surface Book 940M GDDR5

    When comparing GeForce GT 640 and Maxwell GPU Surface Book 940M GDDR5, 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 GT 640 and Maxwell GPU Surface Book 940M GDDR5 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GT 640 Check Price
    Maxwell GPU Surface Book 940M GDDR5 Check Price

    Maxwell GPU Surface Book 940M GDDR5 is a Laptop Graphics Card

    Note: Maxwell GPU Surface Book 940M GDDR5 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 Maxwell GPU Surface Book 940M GDDR5 here:

    Maxwell GPU Surface Book 940M GDDR5 Laptops

    Main Specs

      GeForce GT 640 Maxwell GPU Surface Book 940M GDDR5
    Power consumption (TDP) 65 Watt
    Interface PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB 1 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort
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    • GeForce GT 640 has 1 GB more memory, than Maxwell GPU Surface Book 940M GDDR5.
    • GeForce GT 640 is used in Desktops, and Maxwell GPU Surface Book 940M GDDR5 - in Laptops.
    • GeForce GT 640 is build with Kepler architecture, and Maxwell GPU Surface Book 940M GDDR5 - with Maxwell.
    • Core clock speed of Maxwell GPU Surface Book 940M GDDR5 is 52 MHz higher, than GeForce GT 640.
    • GeForce GT 640 and Maxwell GPU Surface Book 940M GDDR5 are manufactured by 28 nm process technology.
    • Memory clock speed of Maxwell GPU Surface Book 940M GDDR5 is 3230 MHz higher, than GeForce GT 640.

    Game benchmarks

    high / 1080p 2−3 9−10
    ultra / 1080p 1−2 5−6
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 21−24
    medium / 1080p 5−6 12−14
    The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Assassin's Creed Odyssey is 100% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 Maxwell GPU Surface Book 940M GDDR5
    Architecture Kepler Maxwell
    Code name GK107 Surface Book
    Type Desktop Laptop
    Release date 5 June 2012 1 October 2015
    Pipelines 384 384
    Core clock speed 902 MHz 954 MHz
    Boost Clock 993 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.86
    Floating-point performance 692.7 gflops
    Length 145 mm
    Memory bus width 128 Bit 64 Bit
    Memory clock speed 1782 MHz 5012 MHz
    Memory bandwidth 28.51 GB/s
    Shared memory -
    DirectX 12 (11_0) DirectX 12 (FL 11_0), Shader 5.0
    Shader Model 5.1
    OpenGL 4.6
    OpenCL 1.2
    Vulkan 1.1.126
    CUDA 3.0 +
    Bitcoin / BTC (SHA256) 24 Mh/s
    Optimus +
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