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    Mobility Radeon HD 4870 X2 vs Radeon RX 640

    When choosing between Mobility Radeon HD 4870 X2 and Radeon RX 640, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Mobility Radeon HD 4870 X2 and Radeon RX 640.
    Mobility Radeon HD 4870 X2 Check Price
    Radeon RX 640 Check Price

    Mobility Radeon HD 4870 X2 and Radeon RX 640 are Laptop Graphics Cards

    Note: Mobility Radeon HD 4870 X2 and Radeon RX 640 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 4870 X2 or Radeon RX 640 here:

    Mobility Radeon HD 4870 X2 Laptops
    Radeon RX 640 Laptops

    Main Specs

      Mobility Radeon HD 4870 X2 Radeon RX 640
    Power consumption (TDP) 50 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR3, GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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    • Mobility Radeon HD 4870 X2 is connected by PCIe 2.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
    • Radeon RX 640 has 2 GB more memory, than Mobility Radeon HD 4870 X2.
    • Both cards are used in Laptops.
    • Mobility Radeon HD 4870 X2 is build with Terascale 1 architecture, and Radeon RX 640 - with Polaris.
    • Core clock speed of Radeon RX 640 is 668 MHz higher, than Mobility Radeon HD 4870 X2.
    • Mobility Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Radeon RX 640 - by 14 nm process technology.
    • Memory clock speed of Radeon RX 640 is 5112 MHz higher, than Mobility Radeon HD 4870 X2.

    Game benchmarks

    high / 1080p 9−10 5−6
    ultra / 1080p 5−6 3−4
    QHD / 1440p 0−1 2−3
    low / 720p 21−24 16−18
    medium / 1080p 12−14 7−8
    The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 50% more, than Radeon RX 640.

    Full Specs

      Mobility Radeon HD 4870 X2 Radeon RX 640
    Architecture Terascale 1 Polaris
    Code name M98-XT Polaris 12
    Type Laptop Laptop
    Release date 9 January 2009 12 August 2019
    Pipelines 1600 640
    Core clock speed 550 MHz 1218 MHz
    Boost Clock 1218 MHz
    Transistor count 956 million 2,200 million
    Manufacturing process technology 55 nm 14 nm
    Texture fill rate 22.00 38.98
    Floating-point performance 2x 880.0 gflops
    Memory bus width 256 Bit 64 Bit
    Memory clock speed 888 MHz 6000 MHz
    Memory bandwidth 89.6 GB/s 112.0 GB/s
    Shared memory - -
    DirectX 10.1 (10_1) 12 (12_0)
    Shader Model 4.1 6.4
    OpenGL 3.3 4.6
    OpenCL 1.1 2.0
    Vulkan N/A 1.2.131
    FreeSync +
    Laptop size large large
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