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    Mobility Radeon HD 3870 X2 vs Radeon RX 550X

    When comparing Mobility Radeon HD 3870 X2 and Radeon RX 550X, 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 RX 550X 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 RX 550X

    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 RX 550X
    Power consumption (TDP) 110 Watt 50 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR3 GDDR5
    Maximum RAM amount 512 MB 4 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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    • Mobility Radeon HD 3870 X2 has 120% more power consumption, than Radeon RX 550X.
    • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon RX 550X uses PCIe 3.0 x8 interface.
    • Mobility Radeon HD 3870 X2 has 508 GB more memory, than Radeon RX 550X.
    • Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon RX 550X - in Desktops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon RX 550X - with GCN 4.0.
    • Core clock speed of Radeon RX 550X is 440 MHz higher, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon RX 550X - by 14 nm process technology.
    • Memory clock speed of Radeon RX 550X is 5150 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 10−11
    ultra / 1080p 4−5 6−7
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 21−24
    medium / 1080p 8−9 12−14
    The average gaming FPS of Radeon RX 550X in Assassin's Creed Odyssey is 44% more, than Mobility Radeon HD 3870 X2.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon RX 550X
    Architecture RV6xx GCN 4.0
    Code name M88-XT CF Lexa
    Type Laptop Desktop
    Release date 1 September 2008 16 December 2018
    Pipelines 640 512
    Core clock speed 660 MHz 1100 MHz
    Boost Clock 1183 MHz
    Transistor count 666 million 2,200 million
    Manufacturing process technology 55 nm 14 nm
    Texture fill rate 10.56 37.86
    Floating-point performance 2x 422.4 gflops 1,211 gflops
    Length 145 mm
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 850 MHz 6000 MHz
    Memory bandwidth 54.4 GB/s 96 GB/s
    Shared memory -
    DirectX 10.1 (10_1) 12 (12_0)
    Shader Model 4.1 6.4
    OpenGL 3.3 4.6
    OpenCL N/A 2.0
    Vulkan N/A 1.2.131
    Laptop size large
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