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    GeForce GT 640M vs GeForce GTX 675M SLI

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and GeForce GTX 675M SLI. 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 640M and GeForce GTX 675M SLI. 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 640M Check Price
    GeForce GTX 675M SLI Check Price

    GeForce GT 640M and GeForce GTX 675M SLI are Laptop Graphics Cards

    Note: GeForce GT 640M and GeForce GTX 675M SLI 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 640M or GeForce GTX 675M SLI here:

    GeForce GT 640M Laptops
    GeForce GTX 675M SLI Laptops

    Main Specs

      GeForce GT 640M GeForce GTX 675M SLI
    Power consumption (TDP) 32 Watt 2x 100 Watt
    Interface PCIe 3.0 x16
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB
    Display Connectors No outputs
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    • GeForce GT 640M has 1500% more power consumption, than GeForce GTX 675M SLI.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and GeForce GTX 675M SLI - with Fermi.
    • GeForce GT 640M is manufactured by 28 nm process technology, and GeForce GTX 675M SLI - by 40 nm process technology.
    • Memory clock speed of GeForce GTX 675M SLI is 1200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 18−20
    ultra / 1080p 0−1 10−12
    QHD / 1440p 0−1 5−6
    4K / 2160p − 4−5
    low / 720p 10−12 35−40
    medium / 1080p 2−3 24−27
    The average gaming FPS of GeForce GTX 675M SLI in Assassin's Creed Odyssey is 416% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M GeForce GTX 675M SLI
    Architecture Kepler Fermi
    Code name N13P-GS N12E-GTX2
    Type Laptop Laptop
    Release date 22 March 2012 6 January 2011
    Pipelines 384 768
    Core clock speed 620 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 40 nm
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz 3000 MHz
    Shared memory - -
    DirectX 12 API DirectX 11, Shader 5.0
    Shader Model 5.1
    OpenGL 4.5
    OpenCL 1.1
    Vulkan 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    SLI options +
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s
    Laptop size medium sized large
    Optimus + +
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