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    GeForce GT 640M vs Iris Graphics 540

    When comparing GeForce GT 640M and Iris Graphics 540, 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 GeForce GT 640M and Iris Graphics 540 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GT 640M Check Price
    Iris Graphics 540 Check Price

    GeForce GT 640M and Iris Graphics 540 are Laptop Graphics Cards

    Note: GeForce GT 640M and Iris Graphics 540 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 Graphics 540 here:

    GeForce GT 640M Laptops
    Iris Graphics 540 Laptops

    Main Specs

      GeForce GT 640M Iris Graphics 540
    Power consumption (TDP) 32 Watt 15 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x1
    Memory type DDR3\GDDR5 eDRAM
    Maximum RAM amount 2 GB 64 MB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M has 113% more power consumption, than Iris Graphics 540.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Iris Graphics 540 uses PCIe 3.0 x1 interface.
    • Iris Graphics 540 has 62 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Iris Graphics 540 - with Gen. 9 Skylake.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Iris Graphics 540 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 0−1 8−9
    ultra / 1080p 0−1 5−6
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 20−22
    medium / 1080p 2−3 10−12
    The average gaming FPS of Iris Graphics 540 in Assassin's Creed Odyssey is 166% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Iris Graphics 540
    Architecture Kepler Gen. 9 Skylake
    Code name N13P-GS Skylake GT3e
    Type Laptop Laptop
    Release date 22 March 2012 1 September 2015
    Pipelines 384 48
    Core clock speed 300 MHz
    Boost Clock 645 MHz 1050 MHz
    Transistor count 1,270 million 189 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 1.1.97
    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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