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    GeForce GT 640M LE vs GeForce GT 645M

    In this comparison between GeForce GT 640M LE and GeForce GT 645M 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 LE will be the best choice, for others GeForce GT 645M will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M LE Check Price
    GeForce GT 645M Check Price

    GeForce GT 640M LE and GeForce GT 645M are Laptop Graphics Cards

    Note: GeForce GT 640M LE and GeForce GT 645M 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 LE or GeForce GT 645M here:

    GeForce GT 640M LE Laptops
    GeForce GT 645M Laptops

    Main Specs

      GeForce GT 640M LE GeForce GT 645M
    Power consumption (TDP) 20 Watt 32 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x16
    Memory type DDR3\DDR5 DDR3\GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 645M has 60% more power consumption, than GeForce GT 640M LE.
    • GeForce GT 640M LE is connected by PCIe 2.0 x16, and GeForce GT 645M uses PCIe 3.0 x16 interface.
    • GeForce GT 640M LE and GeForce GT 645M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M LE is build with Fermi / Kepler architecture, and GeForce GT 645M - with Kepler.
    • GeForce GT 640M LE and GeForce GT 645M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 640M LE and GeForce GT 645M is 1800 MHz.

    Game benchmarks

    high / 1080p 0−1 1−2
    ultra / 1080p − 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 1−2 12−14
    medium / 1080p 0−1 2−3
    The average gaming FPS of GeForce GT 645M in Assassin's Creed Odyssey is 1200% more, than GeForce GT 640M LE.

    Full Specs

      GeForce GT 640M LE GeForce GT 645M
    Architecture Fermi / Kepler Kepler
    Code name N13P-LP N13P-GS
    Type Laptop Laptop
    Release date 22 March 2012 22 March 2012
    Pipelines 384 384
    Transistor count 585 million 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec
    Floating-point performance 384.0 gflops 544.5 gflops
    Memory bus width 128bit 128bit
    Memory clock speed 1800 - 4000 MHz 1800 MHz
    Shared memory - -
    DirectX 12 API 12 API
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan N/A 1.1.126
    CUDA + +
    CUDA cores Up to 384 384
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 2.0, PCI Express 3.0
    HDMI + +
    HDCP + +
    Maximum VGA resolution Up to 2048x1536 Up to 2048x1536
    3D Blu-Ray + +
    Bitcoin / BTC (SHA256) 14 Mh/s 19 Mh/s
    Laptop size medium sized medium sized
    Optimus + +
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