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    Maxwell GPU Surface Book 940M GDDR5 vs Radeon HD 7990

    When comparing Maxwell GPU Surface Book 940M GDDR5 and Radeon HD 7990, 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 HD 7990 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 HD 7990 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

      Maxwell GPU Surface Book 940M GDDR5 Radeon HD 7990
    Power consumption (TDP) 375 Watt
    Interface PCIe 3.0 x16
    Supplementary power connectors 2x 8-pin
    Memory type GDDR5 GDDR5
    Maximum RAM amount 1 GB 3 GB
    Display Connectors 1x DVI, 4x mini-DisplayPort
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    • Radeon HD 7990 has 2 GB more memory, than Maxwell GPU Surface Book 940M GDDR5.
    • Maxwell GPU Surface Book 940M GDDR5 is used in Laptops, and Radeon HD 7990 - in Desktops.
    • Maxwell GPU Surface Book 940M GDDR5 is build with Maxwell architecture, and Radeon HD 7990 - with GCN 1.0.
    • Core clock speed of Maxwell GPU Surface Book 940M GDDR5 is 4 MHz higher, than Radeon HD 7990.
    • Maxwell GPU Surface Book 940M GDDR5 and Radeon HD 7990 are manufactured by 28 nm process technology.
    • Memory clock speed of Radeon HD 7990 is 988 MHz higher, than Maxwell GPU Surface Book 940M GDDR5.

    Game benchmarks

    high / 1080p 9−10 35−40
    ultra / 1080p 5−6 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 21−24 60−65
    medium / 1080p 12−14 40−45
    The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 241% more, than Maxwell GPU Surface Book 940M GDDR5.

    Full Specs

      Maxwell GPU Surface Book 940M GDDR5 Radeon HD 7990
    Architecture Maxwell GCN 1.0
    Code name Surface Book Malta
    Type Laptop Desktop
    Release date 1 October 2015 24 April 2013
    Pipelines 384 2048
    Core clock speed 954 MHz 950 MHz
    Boost Clock 993 MHz 1000 MHz
    Transistor count 4,313 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 128.0
    Floating-point performance 2x 4,096 gflops
    Length 307 mm
    Memory bus width 64 Bit 384 Bit
    Memory clock speed 5012 MHz 6000 MHz
    Memory bandwidth 288.0 GB/s
    Shared memory -
    DirectX DirectX 12 (FL 11_0), Shader 5.0 12 (11_1)
    Shader Model 5.1
    OpenGL 4.6
    OpenCL 1.2
    Vulkan 1.2.131
    CUDA +
    Bitcoin / BTC (SHA256) 459 Mh/s
    Optimus +
    Ethereum / ETH (DaggerHashimoto) 44 Mh/s
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