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    Mobility Radeon HD 4830 vs Radeon HD 6990M Crossfire

    If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4830 and Radeon HD 6990M Crossfire, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Mobility Radeon HD 4830 stacks up against Radeon HD 6990M Crossfire, check out specs charts below.
    Mobility Radeon HD 4830 Check Price
    Radeon HD 6990M Crossfire Check Price

    Mobility Radeon HD 4830 and Radeon HD 6990M Crossfire are Laptop Graphics Cards

    Note: Mobility Radeon HD 4830 and Radeon HD 6990M Crossfire 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 Mobility Radeon HD 4830 or Radeon HD 6990M Crossfire here:

    Mobility Radeon HD 4830 Laptops
    Radeon HD 6990M Crossfire Laptops

    Main Specs

      Mobility Radeon HD 4830 Radeon HD 6990M Crossfire
    Interface PCIe 2.0 x16
    Memory type GDDR3, DDR3 GDDR5
    Maximum RAM amount 1 GB 2x2 GB
    Display Connectors No outputs
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    • Radeon HD 6990M Crossfire has 1 GB more memory, than Mobility Radeon HD 4830.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 4830 is build with Terascale 1 architecture, and Radeon HD 6990M Crossfire - with Terascale 2.
    • Core clock speed of Radeon HD 6990M Crossfire is 165 MHz higher, than Mobility Radeon HD 4830.
    • Mobility Radeon HD 4830 and Radeon HD 6990M Crossfire are manufactured by 40 nm process technology.
    • Memory clock speed of Radeon HD 6990M Crossfire is 200 MHz higher, than Mobility Radeon HD 4830.

    Game benchmarks

    high / 1080p 0−1 35−40
    ultra / 1080p 0−1 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 10−11 60−65
    medium / 1080p 1−2 40−45
    The average gaming FPS of Radeon HD 6990M Crossfire in Assassin's Creed Odyssey is 766% more, than Mobility Radeon HD 4830.

    Full Specs

      Mobility Radeon HD 4830 Radeon HD 6990M Crossfire
    Architecture Terascale 1 Terascale 2
    Code name M97 Blackcomb XTX
    Type Laptop Laptop
    Release date 3 March 2009 12 July 2011
    Pipelines 640 2240
    Core clock speed 550 MHz 715 MHz
    Transistor count 826 million 2x1700 Million
    Manufacturing process technology 40 nm 40 nm
    Texture fill rate 17.60
    Floating-point performance 704.0 gflops
    Memory bus width 128 Bit 256 Bit
    Memory clock speed 700 MHz 900 MHz
    Memory bandwidth 44.8 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) DirectX 11, Shader 5.0
    Shader Model 4.1
    OpenGL 3.3
    OpenCL 1.1
    Vulkan N/A
    Laptop size large large
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