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    GeForce GT 645M vs GeForce GTX 580M

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 645M and GeForce GTX 580M. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 645M and GeForce GTX 580M. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
    GeForce GT 645M Check Price
    GeForce GTX 580M Check Price

    GeForce GT 645M and GeForce GTX 580M are Laptop Graphics Cards

    Note: GeForce GT 645M and GeForce GTX 580M 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 645M or GeForce GTX 580M here:

    GeForce GT 645M Laptops
    GeForce GTX 580M Laptops

    Main Specs

      GeForce GT 645M GeForce GTX 580M
    Power consumption (TDP) 32 Watt 100 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 MB
    Display Connectors No outputs No outputs
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    • GeForce GTX 580M has 212% more power consumption, than GeForce GT 645M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 580M uses MXM-B (3.0) interface.
    • GeForce GT 645M and GeForce GTX 580M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 580M - with Fermi.
    • GeForce GT 645M is manufactured by 28 nm process technology, and GeForce GTX 580M - by 40 nm process technology.
    • Memory clock speed of GeForce GT 645M is 300 MHz higher, than GeForce GTX 580M.

    Game benchmarks

    high / 1080p 1−2 10−12
    ultra / 1080p 0−1 6−7
    QHD / 1440p 0−1 1−2
    low / 720p 12−14 24−27
    medium / 1080p 2−3 14−16
    The average gaming FPS of GeForce GTX 580M in Assassin's Creed Odyssey is 240% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M GeForce GTX 580M
    Architecture Kepler Fermi
    Code name N13P-GS N12E-GTX2
    Type Laptop Laptop
    Release date 22 March 2012 28 June 2011
    Pipelines 384 384
    Core clock speed 620 MHz
    Transistor count 1,270 million 1,950 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 22.7 billion/sec 39.7 billion/sec
    Floating-point performance 544.5 gflops 952.3 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 MHz 1500 MHz
    Memory bandwidth 96.0 GB/s
    Shared memory - -
    DirectX 12 API 12 API
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.1 1.1
    Vulkan 1.1.126 N/A
    CUDA + +
    CUDA cores 384 384
    Bus support PCI Express 2.0, PCI Express 3.0 PCI-E 2.0
    SLI options +
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray + +
    3D Gaming +
    Bitcoin / BTC (SHA256) 19 Mh/s 40 Mh/s
    Laptop size medium sized large
    Optimus + +
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