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    Iris Plus Graphics 645 vs Mobility Radeon HD 5870

    If you are going to buy a new graphics card and are choosing between Iris Plus Graphics 645 and Mobility Radeon HD 5870, 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 Plus Graphics 645 stacks up against Mobility Radeon HD 5870, check out specs charts below.
    Iris Plus Graphics 645 Check Price
    Mobility Radeon HD 5870 Check Price

    Iris Plus Graphics 645 and Mobility Radeon HD 5870 are Laptop Graphics Cards

    Note: Iris Plus Graphics 645 and Mobility Radeon HD 5870 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 Plus Graphics 645 or Mobility Radeon HD 5870 here:

    Iris Plus Graphics 645 Laptops
    Mobility Radeon HD 5870 Laptops

    Main Specs

      Iris Plus Graphics 645 Mobility Radeon HD 5870
    Power consumption (TDP) 15 Watt 50 Watt
    Interface PCIe 3.0 x1 MXM-B (3.0)
    Memory type DDR3/DDR4 DDR3, GDDR3, GDDR5
    Maximum RAM amount 1 GB
    Display Connectors No outputs No outputs
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    • Mobility Radeon HD 5870 has 233% more power consumption, than Iris Plus Graphics 645.
    • Iris Plus Graphics 645 is connected by PCIe 3.0 x1, and Mobility Radeon HD 5870 uses MXM-B (3.0) interface.
    • Both cards are used in Laptops.
    • Iris Plus Graphics 645 is build with Gen. 9.5 Coffee Lake architecture, and Mobility Radeon HD 5870 - with Terascale 2.
    • Core clock speed of Mobility Radeon HD 5870 is 400 MHz higher, than Iris Plus Graphics 645.
    • Iris Plus Graphics 645 is manufactured by 14 nm process technology, and Mobility Radeon HD 5870 - by 40 nm process technology.

    Game benchmarks

    high / 1080p 4−5 10−11
    ultra / 1080p 2−3 6−7
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 21−24
    medium / 1080p 5−6 12−14
    The average gaming FPS of Mobility Radeon HD 5870 in Assassin's Creed Odyssey is 116% more, than Iris Plus Graphics 645.

    Full Specs

      Iris Plus Graphics 645 Mobility Radeon HD 5870
    Architecture Gen. 9.5 Coffee Lake Terascale 2
    Code name Kaby Lake GT3e Broadway-XT
    Type Laptop Laptop
    Release date 10 July 2019 7 January 2010
    Pipelines 48 800
    Core clock speed 300 MHz 700 MHz
    Boost Clock 1150 MHz
    Transistor count 1,040 million
    Manufacturing process technology 14 nm 40 nm
    Texture fill rate 50.40 28.00
    Floating-point performance 1,120.0 gflops
    Memory bus width 128 Bit
    Memory clock speed 1000 MHz
    Memory bandwidth 64 GB/s
    Shared memory + -
    DirectX 12 (12_1) 11.2 (11_0)
    Shader Model 6.4 5.0
    OpenGL 4.6 4.4
    OpenCL 2.1 1.2
    Vulkan 1.1.103 N/A
    Laptop size large
    Quick Sync +
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