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    Radeon HD 6990M Crossfire vs Radeon R9 M375X

    In this comparison between Radeon HD 6990M Crossfire and Radeon R9 M375X 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 M375X will be their preference. Study the comparison tables below and make your choice.
    Radeon HD 6990M Crossfire Check Price
    Radeon R9 M375X

    Radeon HD 6990M Crossfire is a Laptop Graphics Card

    Note: Radeon HD 6990M Crossfire 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 Radeon HD 6990M Crossfire here:

    Radeon HD 6990M Crossfire Laptops

    Main Specs

      Radeon HD 6990M Crossfire Radeon R9 M375X
    Interface PCIe 3.0 x16
    Memory type GDDR5 GDDR5
    Maximum RAM amount 2x2 GB 4 GB
    Display Connectors No outputs
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    • Radeon R9 M375X has 2 GB more memory, than Radeon HD 6990M Crossfire.
    • Radeon HD 6990M Crossfire is used in Laptops, and Radeon R9 M375X - in Desktops.
    • Radeon HD 6990M Crossfire is build with Terascale 2 architecture, and Radeon R9 M375X - with GCN 1.0.
    • Core clock speed of Radeon R9 M375X is 210 MHz higher, than Radeon HD 6990M Crossfire.
    • Radeon HD 6990M Crossfire is manufactured by 40 nm process technology, and Radeon R9 M375X - by 28 nm process technology.
    • Memory clock speed of Radeon R9 M375X is 225 MHz higher, than Radeon HD 6990M Crossfire.

    Game benchmarks

    high / 1080p 35−40 9−10
    ultra / 1080p 21−24 5−6
    QHD / 1440p 16−18 0−1
    4K / 2160p 10−11 −
    low / 720p 60−65 21−24
    medium / 1080p 40−45 12−14
    The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 241% more, than Radeon R9 M375X.

    Full Specs

      Radeon HD 6990M Crossfire Radeon R9 M375X
    Architecture Terascale 2 GCN 1.0
    Code name Blackcomb XTX Tropo
    Type Laptop Desktop
    Release date 12 July 2011 5 May 2015
    Pipelines 2240 640
    Core clock speed 715 MHz 925 MHz
    Boost Clock 1015 MHz
    Transistor count 2x1700 Million 1,500 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 40.60
    Floating-point performance 1,299 gflops
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 900 MHz 1125 MHz
    Memory bandwidth 72 GB/s
    Shared memory -
    DirectX DirectX 11, Shader 5.0
    Shader Model 5.1
    OpenGL 4.4
    OpenCL Not Listed
    FreeSync +
    Bus support PCIe 3.0
    Laptop size large
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 10
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