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    Mobility Radeon HD 3870 X2 vs Radeon R9 M485X

    When choosing between Mobility Radeon HD 3870 X2 and Radeon R9 M485X, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Mobility Radeon HD 3870 X2 and Radeon R9 M485X.
    Mobility Radeon HD 3870 X2 Check Price
    Radeon R9 M485X Check Price

    Mobility Radeon HD 3870 X2 and Radeon R9 M485X are Laptop Graphics Cards

    Note: Mobility Radeon HD 3870 X2 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 Mobility Radeon HD 3870 X2 or Radeon R9 M485X here:

    Mobility Radeon HD 3870 X2 Laptops
    Radeon R9 M485X Laptops

    Main Specs

      Mobility Radeon HD 3870 X2 Radeon R9 M485X
    Power consumption (TDP) 110 Watt 250 Watt
    Interface PCIe 2.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type GDDR3 GDDR5
    Maximum RAM amount 512 MB 8 GB MB
    Display Connectors No outputs No outputs
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    • Radeon R9 M485X has 127% more power consumption, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon R9 M485X uses MXM-B (3.0) interface.
    • Mobility Radeon HD 3870 X2 has 504 GB more memory, than Radeon R9 M485X.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon R9 M485X - with GCN 3.
    • Core clock speed of Radeon R9 M485X is 63 MHz higher, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon R9 M485X - by 28 nm process technology.
    • Memory clock speed of Radeon R9 M485X is 4150 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 24−27
    ultra / 1080p 4−5 14−16
    QHD / 1440p 0−1 10−11
    4K / 2160p − 6−7
    low / 720p 16−18 45−50
    medium / 1080p 8−9 30−35
    The average gaming FPS of Radeon R9 M485X in Assassin's Creed Odyssey is 233% more, than Mobility Radeon HD 3870 X2.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon R9 M485X
    Architecture RV6xx GCN 3
    Code name M88-XT CF Amethyst
    Type Laptop Laptop
    Release date 1 September 2008 14 May 2016
    Pipelines 640 2048
    Core clock speed 660 MHz 723 MHz
    Transistor count 666 million 5,000 million
    Manufacturing process technology 55 nm 28 nm
    Texture fill rate 10.56 92.54
    Floating-point performance 2x 422.4 gflops 2,961 gflops
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 850 MHz 5000 MHz
    Memory bandwidth 54.4 GB/s 160.0 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) 12 (12_0)
    Shader Model 4.1 6.3
    OpenGL 3.3 4.6
    OpenCL N/A 2.0
    Vulkan N/A 1.2.131
    Laptop size large large
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