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    Radeon HD 8870M vs Radeon RX 640

    When comparing Radeon HD 8870M and Radeon RX 640, 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 Radeon HD 8870M and Radeon RX 640 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Radeon HD 8870M Check Price
    Radeon RX 640 Check Price

    Radeon HD 8870M and Radeon RX 640 are Laptop Graphics Cards

    Note: Radeon HD 8870M 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 Radeon HD 8870M or Radeon RX 640 here:

    Radeon HD 8870M Laptops
    Radeon RX 640 Laptops

    Main Specs

      Radeon HD 8870M Radeon RX 640
    Power consumption (TDP) 50 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR5, DDR3 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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    • Radeon HD 8870M is connected by PCIe 3.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
    • Radeon RX 640 has 2 GB more memory, than Radeon HD 8870M.
    • Both cards are used in Laptops.
    • Radeon HD 8870M is build with GCN architecture, and Radeon RX 640 - with Polaris.
    • Core clock speed of Radeon RX 640 is 493 MHz higher, than Radeon HD 8870M.
    • Radeon HD 8870M is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.
    • Memory clock speed of Radeon RX 640 is 1500 MHz higher, than Radeon HD 8870M.

    Game benchmarks

    high / 1080p 7−8 5−6
    ultra / 1080p 4−5 3−4
    QHD / 1440p 0−1 2−3
    low / 720p 18−20 16−18
    medium / 1080p 9−10 7−8
    The average gaming FPS of Radeon HD 8870M in Assassin's Creed Odyssey is 25% more, than Radeon RX 640.

    Full Specs

      Radeon HD 8870M Radeon RX 640
    Architecture GCN Polaris
    Code name Venus Polaris 12
    Type Laptop Laptop
    Release date 18 December 2012 12 August 2019
    Pipelines 640 640
    Core clock speed 725 MHz 1218 MHz
    Boost Clock 775 MHz 1218 MHz
    Transistor count 1,500 million 2,200 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 31.00 38.98
    Floating-point performance 992.0 gflops
    Memory bus width 128 Bit 64 Bit
    Memory clock speed 4500 MHz 6000 MHz
    Memory bandwidth 72 GB/s 112.0 GB/s
    Shared memory - -
    DirectX 12 (11_1) 12 (12_0)
    Shader Model 5.1 6.4
    OpenGL 4.6 4.6
    OpenCL 1.2 2.0
    Vulkan 1.2.131 1.2.131
    FreeSync +
    Bitcoin / BTC (SHA256) 107 Mh/s
    Laptop size large large
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