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    Mobility Radeon HD 3870 X2 vs Radeon R7 250X

    In this comparison between Mobility Radeon HD 3870 X2 and Radeon R7 250X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Mobility Radeon HD 3870 X2 will be the best choice, for others Radeon R7 250X will be their preference. Study the comparison tables below and make your choice.
    Mobility Radeon HD 3870 X2 Check Price
    Radeon R7 250X Check Price

    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 R7 250X
    Power consumption (TDP) 110 Watt 80 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x16
    Supplementary power connectors 1 x 6-pin
    Memory type GDDR3 GDDR5
    Maximum RAM amount 512 MB 2 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 2x mini-DisplayPort
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    • Mobility Radeon HD 3870 X2 has 37% more power consumption, than Radeon R7 250X.
    • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon R7 250X uses PCIe 3.0 x16 interface.
    • Mobility Radeon HD 3870 X2 has 510 GB more memory, than Radeon R7 250X.
    • Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon R7 250X - in Desktops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon R7 250X - with GCN 1.0.
    • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon R7 250X - by 28 nm process technology.
    • Memory clock speed of Radeon R7 250X is 775 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 10−12
    ultra / 1080p 4−5 6−7
    QHD / 1440p 0−1 1−2
    low / 720p 16−18 24−27
    medium / 1080p 8−9 14−16
    The average gaming FPS of Radeon R7 250X in Assassin's Creed Odyssey is 55% more, than Mobility Radeon HD 3870 X2.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon R7 250X
    Architecture RV6xx GCN 1.0
    Code name M88-XT CF Cape Verde
    Type Laptop Desktop
    Release date 1 September 2008 13 February 2014
    Pipelines 640 640
    Core clock speed 660 MHz
    Boost Clock 1000 MHz
    Transistor count 666 million 1,500 million
    Manufacturing process technology 55 nm 28 nm
    Texture fill rate 10.56 38.00
    Floating-point performance 2x 422.4 gflops 1,216 gflops
    Length 210 mm
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 850 MHz 1625 MHz
    Memory bandwidth 54.4 GB/s 96 GB/s
    Shared memory -
    DirectX 10.1 (10_1)
    Shader Model 4.1 5.1
    OpenGL 3.3 4.6
    OpenCL N/A 1.2
    Vulkan N/A
    FreeSync +
    Bus support PCIe 3.0
    HDMI +
    Bitcoin / BTC (SHA256) 152 Mh/s
    Laptop size large
    Eyefinity +
    Design reference
    CrossFire +
    DDMA audio +
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