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    Radeon HD 6990M Crossfire vs Radeon R9 M485X

    Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990M Crossfire and Radeon R9 M485X. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between Radeon HD 6990M Crossfire and Radeon R9 M485X. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
    Radeon HD 6990M Crossfire Check Price
    Radeon R9 M485X Check Price

    Radeon HD 6990M Crossfire and Radeon R9 M485X are Laptop Graphics Cards

    Note: Radeon HD 6990M Crossfire and Radeon R9 M485X 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 M485X here:

    Radeon HD 6990M Crossfire Laptops
    Radeon R9 M485X Laptops

    Main Specs

      Radeon HD 6990M Crossfire Radeon R9 M485X
    Power consumption (TDP) 250 Watt
    Interface MXM-B (3.0)
    Supplementary power connectors None
    Memory type GDDR5 GDDR5
    Maximum RAM amount 2x2 GB 8 GB MB
    Display Connectors No outputs
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    • Radeon R9 M485X has 6 GB more memory, than Radeon HD 6990M Crossfire.
    • Both cards are used in Laptops.
    • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon R9 M485X - with GCN 3.
    • Core clock speed of Radeon R9 M485X is 8 MHz higher, than Radeon HD 6990M Crossfire.
    • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon R9 M485X - by 28 nm process technology.
    • Memory clock speed of Radeon R9 M485X is 4100 MHz higher, than Radeon HD 6990M Crossfire.

    Game benchmarks

    high / 1080p 35−40 24−27
    ultra / 1080p 21−24 14−16
    QHD / 1440p 16−18 10−11
    4K / 2160p 10−11 6−7
    low / 720p 60−65 45−50
    medium / 1080p 40−45 30−35
    The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 45% more, than Radeon R9 M485X.

    Full Specs

      Radeon HD 6990M Crossfire Radeon R9 M485X
    Architecture Terascale 2 GCN 3
    Code name Blackcomb XTX Amethyst
    Type Laptop Laptop
    Release date 12 July 2011 14 May 2016
    Pipelines 2240 2048
    Core clock speed 715 MHz 723 MHz
    Transistor count 2x1700 Million 5,000 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 92.54
    Floating-point performance 2,961 gflops
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 900 MHz 5000 MHz
    Memory bandwidth 160.0 GB/s
    Shared memory - -
    DirectX DirectX 11, Shader 5.0 12 (12_0)
    Shader Model 6.3
    OpenGL 4.6
    OpenCL 2.0
    Vulkan 1.2.131
    Laptop size large large
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