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    GeForce GT 640 vs GeForce GTX 580M

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640 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 640 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 640 Check Price
    GeForce GTX 580M Check Price

    GeForce GTX 580M is a Laptop Graphics Card

    Note: GeForce GTX 580M 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 GTX 580M here:

    GeForce GTX 580M Laptops

    Main Specs

      GeForce GT 640 GeForce GTX 580M
    Power consumption (TDP) 65 Watt 100 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB 2 MB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort No outputs
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    • GeForce GTX 580M has 53% more power consumption, than GeForce GT 640.
    • GeForce GT 640 is connected by PCIe 3.0 x16, and GeForce GTX 580M uses MXM-B (3.0) interface.
    • GeForce GT 640 and GeForce GTX 580M have maximum RAM of 2 GB.
    • GeForce GT 640 is used in Desktops, and GeForce GTX 580M - in Laptops.
    • GeForce GT 640 is build with Kepler architecture, and GeForce GTX 580M - with Fermi.
    • Core clock speed of GeForce GT 640 is 282 MHz higher, than GeForce GTX 580M.
    • GeForce GT 640 is manufactured by 28 nm process technology, and GeForce GTX 580M - by 40 nm process technology.
    • Memory clock speed of GeForce GT 640 is 282 MHz higher, than GeForce GTX 580M.

    Game benchmarks

    high / 1080p 2−3 10−12
    ultra / 1080p 1−2 6−7
    QHD / 1440p 0−1 1−2
    low / 720p 14−16 24−27
    medium / 1080p 5−6 14−16
    The average gaming FPS of GeForce GTX 580M in Assassin's Creed Odyssey is 133% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 GeForce GTX 580M
    Architecture Kepler Fermi
    Code name GK107 N12E-GTX2
    Type Desktop Laptop
    Release date 5 June 2012 28 June 2011
    Pipelines 384 384
    Core clock speed 902 MHz 620 MHz
    Transistor count 1,270 million 1,950 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 28.86 39.7 billion/sec
    Floating-point performance 692.7 gflops 952.3 gflops
    Length 145 mm
    Memory bus width 128 Bit 256 Bit
    Memory clock speed 1782 MHz 1500 MHz
    Memory bandwidth 28.51 GB/s 96.0 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 N/A
    CUDA 3.0 +
    CUDA cores 384
    Bus support PCI-E 2.0
    SLI options +
    3D Blu-Ray +
    3D Gaming +
    Bitcoin / BTC (SHA256) 24 Mh/s 40 Mh/s
    Laptop size large
    Optimus +
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