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    Maxwell GPU Surface Book 940M GDDR5 vs Radeon RX 640

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

    Maxwell GPU Surface Book 940M GDDR5 and Radeon RX 640 are Laptop Graphics Cards

    Note: Maxwell GPU Surface Book 940M GDDR5 and Radeon RX 640 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 Maxwell GPU Surface Book 940M GDDR5 or Radeon RX 640 here:

    Maxwell GPU Surface Book 940M GDDR5 Laptops
    Radeon RX 640 Laptops

    Main Specs

      Maxwell GPU Surface Book 940M GDDR5 Radeon RX 640
    Power consumption (TDP) 50 Watt
    Interface PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR5 GDDR5
    Maximum RAM amount 1 GB 4 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort
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    • Radeon RX 640 has 3 GB more memory, than Maxwell GPU Surface Book 940M GDDR5.
    • Both cards are used in Laptops.
    • Maxwell GPU Surface Book 940M GDDR5 is build with Maxwell architecture, and Radeon RX 640 - with Polaris.
    • Core clock speed of Radeon RX 640 is 264 MHz higher, than Maxwell GPU Surface Book 940M GDDR5.
    • Maxwell GPU Surface Book 940M GDDR5 is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.
    • Memory clock speed of Radeon RX 640 is 988 MHz higher, than Maxwell GPU Surface Book 940M GDDR5.

    Game benchmarks

    high / 1080p 9−10 5−6
    ultra / 1080p 5−6 3−4
    QHD / 1440p 0−1 2−3
    low / 720p 21−24 16−18
    medium / 1080p 12−14 7−8
    The average gaming FPS of Maxwell GPU Surface Book 940M GDDR5 in Assassin's Creed Odyssey is 50% more, than Radeon RX 640.

    Full Specs

      Maxwell GPU Surface Book 940M GDDR5 Radeon RX 640
    Architecture Maxwell Polaris
    Code name Surface Book Polaris 12
    Type Laptop Laptop
    Release date 1 October 2015 12 August 2019
    Pipelines 384 640
    Core clock speed 954 MHz 1218 MHz
    Boost Clock 993 MHz 1218 MHz
    Transistor count 2,200 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 38.98
    Memory bus width 64 Bit 64 Bit
    Memory clock speed 5012 MHz 6000 MHz
    Memory bandwidth 112.0 GB/s
    Shared memory - -
    DirectX DirectX 12 (FL 11_0), Shader 5.0 12 (12_0)
    Shader Model 6.4
    OpenGL 4.6
    OpenCL 2.0
    Vulkan 1.2.131
    CUDA +
    FreeSync +
    Laptop size large
    Optimus +
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