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    GeForce 840A vs Iris Plus Graphics 640

    When comparing GeForce 840A and Iris Plus Graphics 640, 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 840A and Iris Plus Graphics 640 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce 840A
    Iris Plus Graphics 640 Check Price

    Iris Plus Graphics 640 is a Laptop Graphics Card

    Note: Iris Plus Graphics 640 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 640 here:

    Iris Plus Graphics 640 Laptops

    Main Specs

      GeForce 840A Iris Plus Graphics 640
    Power consumption (TDP) 33 Watt 15 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x1
    Memory type DDR3 DDR3L/LPDDR3/DDR4
    Maximum RAM amount 2 GB 32 GB
    Display Connectors No outputs No outputs
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    • GeForce 840A has 120% more power consumption, than Iris Plus Graphics 640.
    • GeForce 840A is connected by PCIe 3.0 x8, and Iris Plus Graphics 640 uses PCIe 3.0 x1 interface.
    • Iris Plus Graphics 640 has 30 GB more memory, than GeForce 840A.
    • GeForce 840A is used in Desktops, and Iris Plus Graphics 640 - in Laptops.
    • GeForce 840A is build with Maxwell architecture, and Iris Plus Graphics 640 - with Gen. 9.5 Kaby Lake.
    • Core clock speed of GeForce 840A is 729 MHz higher, than Iris Plus Graphics 640.
    • GeForce 840A is manufactured by 28 nm process technology, and Iris Plus Graphics 640 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 3−4 6−7
    ultra / 1080p 2−3 4−5
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 16−18
    medium / 1080p 5−6 8−9
    The average gaming FPS of Iris Plus Graphics 640 in Assassin's Creed Odyssey is 50% more, than GeForce 840A.

    Full Specs

      GeForce 840A Iris Plus Graphics 640
    Architecture Maxwell Gen. 9.5 Kaby Lake
    Code name GM108 Kaby Lake GT3e
    Type Desktop Laptop
    Release date 17 March 2014 3 January 2017
    Pipelines 384 48
    Core clock speed 1029 MHz 300 MHz
    Boost Clock 1124 MHz 1050 MHz
    Transistor count 189 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 17.98 52.80
    Floating-point performance 863.2 gflops
    Memory bus width 64 Bit 64/128 Bit
    Memory clock speed 2002 MHz
    Memory bandwidth 16.02 GB/s
    Shared memory +
    DirectX 12 (11_0) 12 (12_1)
    Shader Model 5.1 6.4
    OpenGL 4.6 4.6
    OpenCL 1.2 2.1
    Vulkan 1.1.126 1.1.103
    CUDA 5.0
    Quick Sync +
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