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    GeForce GT 645M vs GeForce GTX 580

    When comparing GeForce GT 645M and GeForce GTX 580, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 645M and GeForce GTX 580 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GT 645M Check Price
    GeForce GTX 580 Check Price

    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 580
    Power consumption (TDP) 32 Watt 244 Watt
    Interface PCIe 3.0 x16 PCIe 2.0 x16
    Supplementary power connectors One 6-pin and One 8-pin
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 1536 MB
    Display Connectors No outputs 2x DVI, 1x mini-HDMI
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    • GeForce GTX 580 has 662% more power consumption, than GeForce GT 645M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and GeForce GTX 580 uses PCIe 2.0 x16 interface.
    • GeForce GTX 580 has 1534 GB more memory, than GeForce GT 645M.
    • GeForce GT 645M is used in Laptops, and GeForce GTX 580 - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 580 - with Fermi.
    • GeForce GT 645M is manufactured by 28 nm process technology, and GeForce GTX 580 - by 40 nm process technology.
    • Memory clock speed of GeForce GTX 580 is 204 MHz higher, than GeForce GT 645M.

    Game benchmarks

    high / 1080p 1−2 21−24
    ultra / 1080p 0−1 14−16
    QHD / 1440p 0−1 8−9
    4K / 2160p − 6−7
    low / 720p 12−14 40−45
    medium / 1080p 2−3 27−30
    The average gaming FPS of GeForce GTX 580 in Assassin's Creed Odyssey is 520% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M GeForce GTX 580
    Architecture Kepler Fermi
    Code name N13P-GS GF110
    Type Laptop Desktop
    Release date 22 March 2012 9 November 2010
    Pipelines 384 512
    Core clock speed 1544 MHz
    Transistor count 1,270 million 3,000 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 22.7 billion/sec 49.4 billion/sec
    Floating-point performance 544.5 gflops 1,581.1 gflops
    Length 10.5" (267 mm) (26.7 cm)
    Memory bus width 128bit 384 Bit
    Memory clock speed 1800 MHz 2004 MHz (4008 data rate)
    Memory bandwidth 192.4 GB/s
    Shared memory -
    DirectX 12 API 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.2
    OpenCL 1.1 1.1
    Vulkan 1.1.126 N/A
    CUDA + +
    CUDA cores 384 512
    Bus support PCI Express 2.0, PCI Express 3.0 PCI-E 2.0 x 16
    Height 4.376" (111 mm) (11.1 cm)
    SLI options +
    Multi monitor support +
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536 2048x1536
    Audio input for HDMI Internal
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 142 Mh/s
    Laptop size medium sized
    Optimus +
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