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    GeForce GT 640M vs Iris Plus Graphics 655

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Iris Plus Graphics 655, 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 Plus Graphics 655, check out specs charts below.
    GeForce GT 640M Check Price
    Iris Plus Graphics 655 Check Price

    GeForce GT 640M and Iris Plus Graphics 655 are Laptop Graphics Cards

    Note: GeForce GT 640M and Iris Plus Graphics 655 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 655 here:

    GeForce GT 640M Laptops
    Iris Plus Graphics 655 Laptops

    Main Specs

      GeForce GT 640M Iris Plus Graphics 655
    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 655.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Iris Plus Graphics 655 uses PCIe 3.0 x1 interface.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Iris Plus Graphics 655 - with Gen. 9.5 Kaby Lake.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Iris Plus Graphics 655 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 0−1 12−14
    ultra / 1080p 0−1 7−8
    QHD / 1440p 0−1 2−3
    low / 720p 10−12 27−30
    medium / 1080p 2−3 16−18
    The average gaming FPS of Iris Plus Graphics 655 in Assassin's Creed Odyssey is 266% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Iris Plus Graphics 655
    Architecture Kepler Gen. 9.5 Kaby Lake
    Code name N13P-GS Kaby Lake GT3e
    Type Laptop Laptop
    Release date 22 March 2012 1 September 2017
    Pipelines 384 48
    Core clock speed 300 MHz
    Boost Clock 645 MHz 1200 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 1.1.103
    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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