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    Radeon HD 6990M Crossfire vs Radeon R9 M280X

    In this comparison between Radeon HD 6990M Crossfire and Radeon R9 M280X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Radeon HD 6990M Crossfire will be the best choice, for others Radeon R9 M280X will be their preference. Study the comparison tables below and make your choice.
    Radeon HD 6990M Crossfire Check Price
    Radeon R9 M280X Check Price

    Radeon HD 6990M Crossfire and Radeon R9 M280X are Laptop Graphics Cards

    Note: Radeon HD 6990M Crossfire and Radeon R9 M280X 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 Radeon HD 6990M Crossfire or Radeon R9 M280X here:

    Radeon HD 6990M Crossfire Laptops
    Radeon R9 M280X Laptops

    Main Specs

      Radeon HD 6990M Crossfire Radeon R9 M280X
    Interface PCIe 3.0 x16
    Memory type GDDR5 Not Listed
    Maximum RAM amount 2x2 GB
    Display Connectors No outputs
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    • Both cards are used in Laptops.
    • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon R9 M280X - with GCN.
    • Core clock speed of Radeon R9 M280X is 185 MHz higher, than Radeon HD 6990M Crossfire.
    • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon R9 M280X - by 28 nm process technology.

    Game benchmarks

    high / 1080p 35−40 2−3
    ultra / 1080p 21−24 1−2
    QHD / 1440p 16−18 0−1
    4K / 2160p 10−11 −
    low / 720p 60−65 14−16
    medium / 1080p 40−45 4−5
    The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 720% more, than Radeon R9 M280X.

    Full Specs

      Radeon HD 6990M Crossfire Radeon R9 M280X
    Architecture Terascale 2 GCN
    Code name Blackcomb XTX Saturn XT
    Type Laptop Laptop
    Release date 12 July 2011 1 February 2015
    Pipelines 2240 896
    Core clock speed 715 MHz 900 MHz
    Transistor count 2x1700 Million 2,080 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 61.60
    Floating-point performance 1,792 gflops
    Memory bus width 256 Bit
    Memory clock speed 900 MHz
    Memory bandwidth 96 GB/s
    Shared memory - -
    DirectX DirectX 11, Shader 5.0
    Shader Model 6.3
    OpenGL 4.4
    OpenCL Not Listed
    FreeSync +
    Bus support Not Listed
    Laptop size large large
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
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