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    Iris Plus Graphics 645 vs Radeon HD 7870 XT

    When comparing Iris Plus Graphics 645 and Radeon HD 7870 XT, 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 Iris Plus Graphics 645 and Radeon HD 7870 XT is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Iris Plus Graphics 645 Check Price
    Radeon HD 7870 XT

    Iris Plus Graphics 645 is a Laptop Graphics Card

    Note: Iris Plus Graphics 645 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 Iris Plus Graphics 645 here:

    Iris Plus Graphics 645 Laptops

    Main Specs

      Iris Plus Graphics 645 Radeon HD 7870 XT
    Power consumption (TDP) 15 Watt 185 Watt
    Interface PCIe 3.0 x1 PCIe 3.0 x16
    Supplementary power connectors 2x 6-pin
    Memory type DDR3/DDR4 GDDR5
    Maximum RAM amount 2 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 2x mini-DisplayPort
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    • Radeon HD 7870 XT has 1133% more power consumption, than Iris Plus Graphics 645.
    • Iris Plus Graphics 645 is connected by PCIe 3.0 x1, and Radeon HD 7870 XT uses PCIe 3.0 x16 interface.
    • Iris Plus Graphics 645 is used in Laptops, and Radeon HD 7870 XT - in Desktops.
    • Iris Plus Graphics 645 is build with Gen. 9.5 Coffee Lake architecture, and Radeon HD 7870 XT - with GCN 1.0.
    • Core clock speed of Radeon HD 7870 XT is 625 MHz higher, than Iris Plus Graphics 645.
    • Iris Plus Graphics 645 is manufactured by 14 nm process technology, and Radeon HD 7870 XT - by 28 nm process technology.

    Game benchmarks

    high / 1080p 4−5 35−40
    ultra / 1080p 2−3 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 12−14 60−65
    medium / 1080p 5−6 40−45
    The average gaming FPS of Radeon HD 7870 XT in Assassin's Creed Odyssey is 583% more, than Iris Plus Graphics 645.

    Full Specs

      Iris Plus Graphics 645 Radeon HD 7870 XT
    Architecture Gen. 9.5 Coffee Lake GCN 1.0
    Code name Kaby Lake GT3e Tahiti
    Type Laptop Desktop
    Release date 10 July 2019 19 November 2012
    Pipelines 48 1536
    Core clock speed 300 MHz 925 MHz
    Boost Clock 1150 MHz 975 MHz
    Transistor count 4,313 million
    Manufacturing process technology 14 nm 28 nm
    Texture fill rate 50.40 93.60
    Floating-point performance 2,995 gflops
    Length 267 mm
    Memory bus width 256 Bit
    Memory clock speed 6000 MHz
    Memory bandwidth 192.0 GB/s
    Shared memory +
    DirectX 12 (12_1) 12 (11_1)
    Shader Model 6.4 5.1
    OpenGL 4.6 4.6
    OpenCL 2.1 1.2
    Vulkan 1.1.103 1.2.131
    Bitcoin / BTC (SHA256) 346 Mh/s
    Ethereum / ETH (DaggerHashimoto) 14.5 Mh/s
    Quick Sync +
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