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    GeForce GT 640M vs Iris Plus Graphics 645

    When choosing between GeForce GT 640M and Iris Plus Graphics 645, 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 GeForce GT 640M and Iris Plus Graphics 645.
    GeForce GT 640M Check Price
    Iris Plus Graphics 645 Check Price

    GeForce GT 640M and Iris Plus Graphics 645 are Laptop Graphics Cards

    Note: GeForce GT 640M and Iris Plus Graphics 645 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 GeForce GT 640M or Iris Plus Graphics 645 here:

    GeForce GT 640M Laptops
    Iris Plus Graphics 645 Laptops

    Main Specs

      GeForce GT 640M Iris Plus Graphics 645
    Power consumption (TDP) 32 Watt 15 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x1
    Memory type DDR3\GDDR5 DDR3/DDR4
    Maximum RAM amount 2 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M has 113% more power consumption, than Iris Plus Graphics 645.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Iris Plus Graphics 645 uses PCIe 3.0 x1 interface.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Iris Plus Graphics 645 - with Gen. 9.5 Coffee Lake.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Iris Plus Graphics 645 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 0−1 4−5
    ultra / 1080p 0−1 2−3
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 12−14
    medium / 1080p 2−3 5−6
    The average gaming FPS of Iris Plus Graphics 645 in Assassin's Creed Odyssey is 50% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Iris Plus Graphics 645
    Architecture Kepler Gen. 9.5 Coffee Lake
    Code name N13P-GS Kaby Lake GT3e
    Type Laptop Laptop
    Release date 22 March 2012 10 July 2019
    Pipelines 384 48
    Core clock speed 300 MHz
    Boost Clock 645 MHz 1150 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 50.40
    Floating-point performance 480.0 gflops
    Memory bus width 128bit
    Memory clock speed 1800 - 4000 MHz
    Shared memory - +
    DirectX 12 API 12 (12_1)
    Shader Model 5.1 6.4
    OpenGL 4.5 4.6
    OpenCL 1.1 2.1
    Vulkan 1.1.126 1.1.103
    CUDA +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s
    Laptop size medium sized
    Optimus +
    Quick Sync +
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