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    GeForce GT 640M vs UHD Graphics 620

    In this comparison between GeForce GT 640M and UHD Graphics 620 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GT 640M will be the best choice, for others UHD Graphics 620 will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M Check Price
    UHD Graphics 620 Check Price

    GeForce GT 640M and UHD Graphics 620 are Laptop Graphics Cards

    Note: GeForce GT 640M and UHD Graphics 620 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 UHD Graphics 620 here:

    GeForce GT 640M Laptops
    UHD Graphics 620 Laptops

    Main Specs

      GeForce GT 640M UHD Graphics 620
    Power consumption (TDP) 32 Watt 15 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x1
    Memory type DDR3\GDDR5 LPDDR3/DDR4
    Maximum RAM amount 2 GB 32 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M has 113% more power consumption, than UHD Graphics 620.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and UHD Graphics 620 uses PCIe 3.0 x1 interface.
    • UHD Graphics 620 has 30 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and UHD Graphics 620 - with Gen. 9.5.
    • GeForce GT 640M is manufactured by 28 nm process technology, and UHD Graphics 620 - by 14 nm process technology.

    Game benchmarks

    high / 1080p 0−1 2−3
    ultra / 1080p 0−1 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 12−14
    medium / 1080p 2−3 3−4
    The average gaming FPS of UHD Graphics 620 in Assassin's Creed Odyssey is 33% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M UHD Graphics 620
    Architecture Kepler Gen. 9.5
    Code name N13P-GS Kaby-Lake-Refresh GT2
    Type Laptop Laptop
    Release date 22 March 2012 1 September 2017
    Pipelines 384 24
    Core clock speed 300 MHz
    Boost Clock 645 MHz 1150 MHz
    Transistor count 1,270 million 189 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 27.60
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 64/128 Bit
    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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