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    Mobility Radeon HD 3870 X2 vs Mobility Radeon HD 4870 X2

    If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 3870 X2 and Mobility Radeon HD 4870 X2, 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 3870 X2 stacks up against Mobility Radeon HD 4870 X2, check out specs charts below.
    Mobility Radeon HD 3870 X2 Check Price
    Mobility Radeon HD 4870 X2 Check Price

    Mobility Radeon HD 3870 X2 and Mobility Radeon HD 4870 X2 are Laptop Graphics Cards

    Note: Mobility Radeon HD 3870 X2 and Mobility Radeon HD 4870 X2 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 Mobility Radeon HD 4870 X2 here:

    Mobility Radeon HD 3870 X2 Laptops
    Mobility Radeon HD 4870 X2 Laptops

    Main Specs

      Mobility Radeon HD 3870 X2 Mobility Radeon HD 4870 X2
    Power consumption (TDP) 110 Watt
    Interface PCIe 2.0 x16 PCIe 2.0 x16
    Memory type GDDR3 GDDR3, GDDR5
    Maximum RAM amount 512 MB 2 GB
    Display Connectors No outputs No outputs
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    • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
    • Mobility Radeon HD 3870 X2 has 510 GB more memory, than Mobility Radeon HD 4870 X2.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Mobility Radeon HD 4870 X2 - with Terascale 1.
    • Core clock speed of Mobility Radeon HD 3870 X2 is 110 MHz higher, than Mobility Radeon HD 4870 X2.
    • Mobility Radeon HD 3870 X2 and Mobility Radeon HD 4870 X2 are manufactured by 55 nm process technology.
    • Memory clock speed of Mobility Radeon HD 4870 X2 is 38 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 9−10
    ultra / 1080p 4−5 5−6
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 21−24
    medium / 1080p 8−9 12−14
    The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 33% more, than Mobility Radeon HD 3870 X2.

    Full Specs

      Mobility Radeon HD 3870 X2 Mobility Radeon HD 4870 X2
    Architecture RV6xx Terascale 1
    Code name M88-XT CF M98-XT
    Type Laptop Laptop
    Release date 1 September 2008 9 January 2009
    Pipelines 640 1600
    Core clock speed 660 MHz 550 MHz
    Transistor count 666 million 956 million
    Manufacturing process technology 55 nm 55 nm
    Texture fill rate 10.56 22.00
    Floating-point performance 2x 422.4 gflops 2x 880.0 gflops
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 850 MHz 888 MHz
    Memory bandwidth 54.4 GB/s 89.6 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) 10.1 (10_1)
    Shader Model 4.1 4.1
    OpenGL 3.3 3.3
    OpenCL N/A 1.1
    Vulkan N/A N/A
    Laptop size large large
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