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    Mobility Radeon HD 3870 X2 vs Radeon HD 4870 X2

    When comparing Mobility Radeon HD 3870 X2 and Radeon HD 4870 X2, 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 HD 4870 X2 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 HD 4870 X2

    Mobility Radeon HD 3870 X2 is a Laptop Graphics Card

    Note: Mobility Radeon HD 3870 X2 is only used in laptop graphics. It has 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 here:

    Mobility Radeon HD 3870 X2 Laptops

    Main Specs

      Mobility Radeon HD 3870 X2 Radeon HD 4870 X2
    Power consumption (TDP) 110 Watt 286 Watt
    Interface PCIe 2.0 x16 PCIe 2.0 x16
    Supplementary power connectors 1x 6-pin + 1x 8-pin
    Memory type GDDR3 GDDR5
    Maximum RAM amount 512 MB 1 GB
    Display Connectors No outputs 2x DVI, 1x S-Video
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    • Radeon HD 4870 X2 has 160% more power consumption, than Mobility Radeon HD 3870 X2.
    • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
    • Mobility Radeon HD 3870 X2 has 511 GB more memory, than Radeon HD 4870 X2.
    • Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon HD 4870 X2 - in Desktops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 4870 X2 - with TeraScale.
    • Core clock speed of Radeon HD 4870 X2 is 40 MHz higher, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 X2 and Radeon HD 4870 X2 are manufactured by 55 nm process technology.
    • Memory clock speed of Radeon HD 4870 X2 is 2750 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 3−4
    ultra / 1080p 4−5 1−2
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 14−16
    medium / 1080p 8−9 6−7
    The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 50% more, than Radeon HD 4870 X2.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon HD 4870 X2
    Architecture RV6xx TeraScale
    Code name M88-XT CF R700
    Type Laptop Desktop
    Release date 1 September 2008 12 August 2008
    Pipelines 640 800
    Core clock speed 660 MHz 700 MHz
    Transistor count 666 million 956 million
    Manufacturing process technology 55 nm 55 nm
    Texture fill rate 10.56 28.00
    Floating-point performance 2x 422.4 gflops 2x 1,120.0 gflops
    Length 267 mm
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 850 MHz 3600 MHz
    Memory bandwidth 54.4 GB/s 115.2 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
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