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    Mobility Radeon HD 3870 X2 vs Radeon 520

    When comparing Mobility Radeon HD 3870 X2 and Radeon 520, 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 Mobility Radeon HD 3870 X2 and Radeon 520 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Mobility Radeon HD 3870 X2 Check Price
    Radeon 520 Check Price

    Mobility Radeon HD 3870 X2 and Radeon 520 are Laptop Graphics Cards

    Note: Mobility Radeon HD 3870 X2 and Radeon 520 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 520 here:

    Mobility Radeon HD 3870 X2 Laptops
    Radeon 520 Laptops

    Main Specs

      Mobility Radeon HD 3870 X2 Radeon 520
    Power consumption (TDP) 110 Watt 50 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR3 DDR3, GDDR5
    Maximum RAM amount 512 MB 2 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 1x VGA
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    • Mobility Radeon HD 3870 X2 has 120% more power consumption, than Radeon 520.
    • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon 520 uses PCIe 3.0 x8 interface.
    • Mobility Radeon HD 3870 X2 has 510 GB more memory, than Radeon 520.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon 520 - with GCN 1.0.
    • Core clock speed of Radeon 520 is 370 MHz higher, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon 520 - by 28 nm process technology.
    • Memory clock speed of Radeon 520 is 1400 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 0−1
    ultra / 1080p 4−5 −
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 1−2
    medium / 1080p 8−9 0−1
    The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 1600% more, than Radeon 520.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon 520
    Architecture RV6xx GCN 1.0
    Code name M88-XT CF Oland
    Type Laptop Laptop
    Release date 1 September 2008 21 March 2017
    Pipelines 640 320
    Core clock speed 660 MHz 1030 MHz
    Transistor count 666 million 1,040 million
    Manufacturing process technology 55 nm 28 nm
    Texture fill rate 10.56 20.60
    Floating-point performance 2x 422.4 gflops 659.2 gflops
    Memory bus width 256 Bit 64 Bit
    Memory clock speed 850 MHz 2250 MHz
    Memory bandwidth 54.4 GB/s 16 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) 12.0
    Shader Model 4.1 5.0
    OpenGL 3.3 4.6
    OpenCL N/A 1.2
    Vulkan N/A +
    Laptop size large
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