Subscribe to our YouTube channel ×

    GeForce GT 645M vs GeForce GTX 675M SLI

    If you are going to buy a new graphics card and are choosing between GeForce GT 645M 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 645M stacks up against GeForce GTX 675M SLI, check out specs charts below.
    GeForce GT 645M Check Price
    GeForce GTX 675M SLI Check Price

    GeForce GT 645M and GeForce GTX 675M SLI are Laptop Graphics Cards

    Note: GeForce GT 645M 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 645M or GeForce GTX 675M SLI here:

    GeForce GT 645M Laptops
    GeForce GTX 675M SLI Laptops

    Main Specs

      GeForce GT 645M 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
      Check Price Check Price
    • GeForce GT 645M has 1500% more power consumption, than GeForce GTX 675M SLI.
    • Both cards are used in Laptops.
    • GeForce GT 645M is build with Kepler architecture, and GeForce GTX 675M SLI - with Fermi.
    • GeForce GT 645M 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 645M.

    Game benchmarks

    high / 1080p 1−2 18−20
    ultra / 1080p 0−1 10−12
    QHD / 1440p 0−1 5−6
    4K / 2160p − 4−5
    low / 720p 12−14 35−40
    medium / 1080p 2−3 24−27
    The average gaming FPS of GeForce GTX 675M SLI in Assassin's Creed Odyssey is 440% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M 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
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 22.7 billion/sec
    Floating-point performance 544.5 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 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) 19 Mh/s
    Laptop size medium sized large
    Optimus + +
      Check Price Check Price

    Similar compares