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    GeForce 845M vs GeForce GT 640M

    In this comparison between GeForce 845M and GeForce GT 640M 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 845M will be the best choice, for others GeForce GT 640M will be their preference. Study the comparison tables below and make your choice.
    GeForce 845M Check Price
    GeForce GT 640M Check Price

    GeForce 845M and GeForce GT 640M are Laptop Graphics Cards

    Note: GeForce 845M and GeForce GT 640M 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 845M or GeForce GT 640M here:

    GeForce 845M Laptops
    GeForce GT 640M Laptops

    Main Specs

      GeForce 845M GeForce GT 640M
    Power consumption (TDP) 45 Watt 32 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Memory type DDR3, GDDR5 DDR3\GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce 845M has 40% more power consumption, than GeForce GT 640M.
    • GeForce 845M is connected by PCIe 3.0 x8, and GeForce GT 640M uses PCIe 3.0 x16 interface.
    • GeForce 845M and GeForce GT 640M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce 845M is build with Maxwell architecture, and GeForce GT 640M - with Kepler.
    • GeForce 845M and GeForce GT 640M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 845M is 200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 3−4 0−1
    ultra / 1080p 1−2 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 10−12
    medium / 1080p 6−7 2−3
    The average gaming FPS of GeForce 845M in Assassin's Creed Odyssey is 66% more, than GeForce GT 640M.

    Full Specs

      GeForce 845M GeForce GT 640M
    Architecture Maxwell Kepler
    Code name GM108 N13P-GS
    Type Laptop Laptop
    Release date 12 March 2014 22 March 2012
    Pipelines 384 384
    Core clock speed 1071 MHz
    Boost Clock 1150 MHz 645 MHz
    Transistor count 1,870 million 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 37.63
    Floating-point performance 883.7 gflops 480.0 gflops
    Memory bus width 64/128 Bit 128bit
    Memory clock speed 2000 - 5000 MHz 1800 - 4000 MHz
    Memory bandwidth 40.1 GB/s
    Shared memory - -
    DirectX 12 (11_0) 12 API
    Shader Model 5.1 5.1
    OpenGL 4.6 4.5
    OpenCL 1.2 1.1
    Vulkan 1.1.126 1.1.126
    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) 76 Mh/s 18 Mh/s
    Laptop size medium sized medium sized
    Optimus + +
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