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    GeForce GT 640 vs GeForce GTX 675M SLI

    If you are going to buy a new graphics card and are choosing between GeForce GT 640 and GeForce GTX 675M SLI, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GT 640 stacks up against GeForce GTX 675M SLI, check out specs charts below.
    GeForce GT 640 Check Price
    GeForce GTX 675M SLI Check Price

    GeForce GTX 675M SLI is a Laptop Graphics Card

    Note: GeForce GTX 675M SLI 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 675M SLI here:

    GeForce GTX 675M SLI Laptops

    Main Specs

      GeForce GT 640 GeForce GTX 675M SLI
    Power consumption (TDP) 65 Watt 2x 100 Watt
    Interface PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort
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    • GeForce GT 640 has 3150% more power consumption, than GeForce GTX 675M SLI.
    • GeForce GT 640 is used in Desktops, and GeForce GTX 675M SLI - in Laptops.
    • GeForce GT 640 is build with Kepler architecture, and GeForce GTX 675M SLI - with Fermi.
    • Core clock speed of GeForce GT 640 is 282 MHz higher, than GeForce GTX 675M SLI.
    • GeForce GT 640 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 1218 MHz higher, than GeForce GT 640.

    Game benchmarks

    high / 1080p 2−3 18−20
    ultra / 1080p 1−2 10−12
    QHD / 1440p 0−1 5−6
    4K / 2160p − 4−5
    low / 720p 14−16 35−40
    medium / 1080p 5−6 24−27
    The average gaming FPS of GeForce GTX 675M SLI in Assassin's Creed Odyssey is 283% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 GeForce GTX 675M SLI
    Architecture Kepler Fermi
    Code name GK107 N12E-GTX2
    Type Desktop Laptop
    Release date 5 June 2012 6 January 2011
    Pipelines 384 768
    Core clock speed 902 MHz 620 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 28.86
    Floating-point performance 692.7 gflops
    Length 145 mm
    Memory bus width 128 Bit 256 Bit
    Memory clock speed 1782 MHz 3000 MHz
    Memory bandwidth 28.51 GB/s
    Shared memory -
    DirectX 12 (11_0) DirectX 11, Shader 5.0
    Shader Model 5.1
    OpenGL 4.6
    OpenCL 1.2
    Vulkan 1.1.126
    CUDA 3.0 +
    SLI options +
    Bitcoin / BTC (SHA256) 24 Mh/s
    Laptop size large
    Optimus +
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