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    GeForce GT 640M vs Iris Pro Graphics 580

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Iris Pro Graphics 580, 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 GeForce GT 640M stacks up against Iris Pro Graphics 580, check out specs charts below.
    GeForce GT 640M Check Price
    Iris Pro Graphics 580 Check Price

    GeForce GT 640M and Iris Pro Graphics 580 are Laptop Graphics Cards

    Note: GeForce GT 640M and Iris Pro Graphics 580 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 Pro Graphics 580 here:

    GeForce GT 640M Laptops
    Iris Pro Graphics 580 Laptops

    Main Specs

      GeForce GT 640M Iris Pro Graphics 580
    Power consumption (TDP) 32 Watt 15 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x1
    Memory type DDR3\GDDR5 DDR3L/LPDDR3/DDR4
    Maximum RAM amount 2 GB 64 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M has 113% more power consumption, than Iris Pro Graphics 580.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Iris Pro Graphics 580 uses PCIe 3.0 x1 interface.
    • Iris Pro Graphics 580 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 Pro Graphics 580 - with Gen. 9 Skylake.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Iris Pro Graphics 580 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 0−1 9−10
    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 Pro Graphics 580 in Assassin's Creed Odyssey is 166% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Iris Pro Graphics 580
    Architecture Kepler Gen. 9 Skylake
    Code name N13P-GS Skylake GT4e
    Type Laptop Laptop
    Release date 22 March 2012 1 September 2015
    Pipelines 384 72
    Core clock speed 350 MHz
    Boost Clock 645 MHz 1050 MHz
    Transistor count 1,270 million 189 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 72.00
    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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