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    Radeon HD 6990M vs Radeon R9 M485X

    When comparing Radeon HD 6990M and Radeon R9 M485X, 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 Radeon HD 6990M and Radeon R9 M485X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Radeon HD 6990M Check Price
    Radeon R9 M485X Check Price

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

    Note: Radeon HD 6990M 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 or Radeon R9 M485X here:

    Radeon HD 6990M Laptops
    Radeon R9 M485X Laptops

    Main Specs

      Radeon HD 6990M Radeon R9 M485X
    Power consumption (TDP) 100 Watt 250 Watt
    Interface MXM-B (3.0) MXM-B (3.0)
    Supplementary power connectors None None
    Memory type GDDR5 GDDR5
    Maximum RAM amount 2 GB 8 GB MB
    Display Connectors No outputs No outputs
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    • Radeon R9 M485X has 150% more power consumption, than Radeon HD 6990M.
    • Both video cards are using MXM-B (3.0) interface connection to a motherboard.
    • Radeon R9 M485X has 6 GB more memory, than Radeon HD 6990M.
    • Both cards are used in Laptops.
    • Radeon HD 6990M 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.
    • Radeon HD 6990M 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.

    Game benchmarks

    high / 1080p 14−16 24−27
    ultra / 1080p 8−9 14−16
    QHD / 1440p 3−4 10−11
    4K / 2160p − 6−7
    low / 720p 30−33 45−50
    medium / 1080p 16−18 30−35
    The average gaming FPS of Radeon R9 M485X in Assassin's Creed Odyssey is 73% more, than Radeon HD 6990M.

    Full Specs

      Radeon HD 6990M 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 1120 2048
    Core clock speed 715 MHz 723 MHz
    Transistor count 1,700 million 5,000 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 40.04 92.54
    Floating-point performance 1,601.6 gflops 2,961 gflops
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 900 MHz 5000 MHz
    Memory bandwidth 115.2 GB/s 160.0 GB/s
    Shared memory - -
    DirectX 11.2 (11_0) 12 (12_0)
    Shader Model 5.0 6.3
    OpenGL 4.4 4.6
    OpenCL 1.2 2.0
    Vulkan N/A 1.2.131
    Laptop size large large
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