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    Mobility Radeon HD 4870 X2 vs Radeon HD 8790M

    If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4870 X2 and Radeon HD 8790M, 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 4870 X2 stacks up against Radeon HD 8790M, check out specs charts below.
    Mobility Radeon HD 4870 X2 Check Price
    Radeon HD 8790M Check Price

    Mobility Radeon HD 4870 X2 and Radeon HD 8790M are Laptop Graphics Cards

    Note: Mobility Radeon HD 4870 X2 and Radeon HD 8790M 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 4870 X2 or Radeon HD 8790M here:

    Mobility Radeon HD 4870 X2 Laptops
    Radeon HD 8790M Laptops

    Main Specs

      Mobility Radeon HD 4870 X2 Radeon HD 8790M
    Interface PCIe 2.0 x16 MXM-A (3.0)
    Supplementary power connectors None
    Memory type GDDR3, GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • Mobility Radeon HD 4870 X2 is connected by PCIe 2.0 x16, and Radeon HD 8790M uses MXM-A (3.0) interface.
    • Mobility Radeon HD 4870 X2 and Radeon HD 8790M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 4870 X2 is build with Terascale 1 architecture, and Radeon HD 8790M - with GCN.
    • Core clock speed of Radeon HD 8790M is 300 MHz higher, than Mobility Radeon HD 4870 X2.
    • Mobility Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Radeon HD 8790M - by 28 nm process technology.
    • Memory clock speed of Radeon HD 8790M is 3612 MHz higher, than Mobility Radeon HD 4870 X2.

    Game benchmarks

    high / 1080p 9−10 3−4
    ultra / 1080p 5−6 1−2
    QHD / 1440p 0−1 0−1
    low / 720p 21−24 14−16
    medium / 1080p 12−14 6−7
    The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 100% more, than Radeon HD 8790M.

    Full Specs

      Mobility Radeon HD 4870 X2 Radeon HD 8790M
    Architecture Terascale 1 GCN
    Code name M98-XT Mars XTX
    Type Laptop Laptop
    Release date 9 January 2009 16 November 2012
    Pipelines 1600 384
    Core clock speed 550 MHz 850 MHz
    Boost Clock 900 MHz
    Transistor count 956 million 950 million
    Manufacturing process technology 55 nm 28 nm
    Texture fill rate 22.00 21.60
    Floating-point performance 2x 880.0 gflops 691.2 gflops
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 888 MHz 4500 MHz
    Memory bandwidth 89.6 GB/s 64 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) 12 (11_1)
    Shader Model 4.1 5.1
    OpenGL 3.3 4.6
    OpenCL 1.1 1.2
    Vulkan N/A 1.2.131
    Bitcoin / BTC (SHA256) 80 Mh/s
    Laptop size large medium sized
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