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    Iris Graphics 5100 vs Mobility Radeon HD 3870 X2

    If you are going to buy a new graphics card and are choosing between Iris Graphics 5100 and Mobility Radeon HD 3870 X2, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Iris Graphics 5100 stacks up against Mobility Radeon HD 3870 X2, check out specs charts below.
    Iris Graphics 5100 Check Price
    Mobility Radeon HD 3870 X2 Check Price

    Iris Graphics 5100 and Mobility Radeon HD 3870 X2 are Laptop Graphics Cards

    Note: Iris Graphics 5100 and Mobility Radeon HD 3870 X2 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 Iris Graphics 5100 or Mobility Radeon HD 3870 X2 here:

    Iris Graphics 5100 Laptops
    Mobility Radeon HD 3870 X2 Laptops

    Main Specs

      Iris Graphics 5100 Mobility Radeon HD 3870 X2
    Power consumption (TDP) 30 Watt 110 Watt
    Interface PCIe 1.0 x16 PCIe 2.0 x16
    Memory type System Shared GDDR3
    Maximum RAM amount 512 MB
    Display Connectors No outputs No outputs
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    • Mobility Radeon HD 3870 X2 has 266% more power consumption, than Iris Graphics 5100.
    • Iris Graphics 5100 is connected by PCIe 1.0 x16, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
    • Both cards are used in Laptops.
    • Iris Graphics 5100 is build with Gen. 7.5 Haswell architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
    • Core clock speed of Mobility Radeon HD 3870 X2 is 460 MHz higher, than Iris Graphics 5100.
    • Iris Graphics 5100 is manufactured by 22 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.

    Game benchmarks

    high / 1080p 3−4 6−7
    ultra / 1080p 1−2 4−5
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 16−18
    medium / 1080p 5−6 8−9
    The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 50% more, than Iris Graphics 5100.

    Full Specs

      Iris Graphics 5100 Mobility Radeon HD 3870 X2
    Architecture Gen. 7.5 Haswell RV6xx
    Code name Haswell GT3 M88-XT CF
    Type Laptop Laptop
    Release date 5 June 2013 1 September 2008
    Pipelines 40 640
    Core clock speed 200 MHz 660 MHz
    Boost Clock 1200 MHz
    Transistor count 1,300 million 666 million
    Manufacturing process technology 22 nm 55 nm
    Texture fill rate 48.00 10.56
    Floating-point performance 2x 422.4 gflops
    Memory bus width 64/128 Bit 256 Bit
    Memory clock speed 850 MHz
    Memory bandwidth 54.4 GB/s
    Shared memory + -
    DirectX 12 (11_1) 10.1 (10_1)
    Shader Model 5.1 4.1
    OpenGL 4.3 3.3
    OpenCL 1.2 N/A
    Vulkan 1.1.80 N/A
    Laptop size large
    Quick Sync +
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