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    GeForce GT 645M vs GeForce GTX 850A

    In this comparison between GeForce GT 645M and GeForce GTX 850A 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 645M will be the best choice, for others GeForce GTX 850A will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 645M Check Price
    GeForce GTX 850A

    GeForce GT 645M is a Laptop Graphics Card

    Note: GeForce GT 645M 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 GeForce GT 645M here:

    GeForce GT 645M Laptops

    Main Specs

      GeForce GT 645M GeForce GTX 850A
    Power consumption (TDP) 32 Watt 45 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Memory type DDR3\GDDR5 DDR3
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce GTX 850A has 40% more power consumption, than GeForce GT 645M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • GeForce GT 645M and GeForce GTX 850A have maximum RAM of 2 GB.
    • GeForce GT 645M is used in Laptops, and GeForce GTX 850A - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 850A - with Maxwell.
    • GeForce GT 645M and GeForce GTX 850A are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 645M and GeForce GTX 850A is 1800 MHz.

    Game benchmarks

    high / 1080p 1−2 1−2
    ultra / 1080p 0−1 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 12−14
    medium / 1080p 2−3 3−4
    The average gaming FPS of GeForce GTX 850A in Assassin's Creed Odyssey is 20% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M GeForce GTX 850A
    Architecture Kepler Maxwell
    Code name N13P-GS GM107
    Type Laptop Desktop
    Release date 22 March 2012 17 March 2014
    Pipelines 384 640
    Core clock speed 902 MHz
    Boost Clock 936 MHz
    Transistor count 1,270 million 1,870 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 37.44
    Floating-point performance 544.5 gflops 1,198 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 MHz 1800 MHz
    Memory bandwidth 28.8 GB/s
    Shared memory -
    DirectX 12 API 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.6
    OpenCL 1.1 1.2
    Vulkan 1.1.126 1.1.126
    CUDA + 5.0
    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) 19 Mh/s
    Laptop size medium sized
    Optimus +
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