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    GeForce 9800M GT SLI vs GeForce GT 645M

    If you are going to buy a new graphics card and are choosing between GeForce 9800M GT SLI and GeForce GT 645M, 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 9800M GT SLI stacks up against GeForce GT 645M, check out specs charts below.
    GeForce 9800M GT SLI Check Price
    GeForce GT 645M Check Price

    GeForce 9800M GT SLI and GeForce GT 645M are Laptop Graphics Cards

    Note: GeForce 9800M GT SLI and GeForce GT 645M 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 9800M GT SLI or GeForce GT 645M here:

    GeForce 9800M GT SLI Laptops
    GeForce GT 645M Laptops

    Main Specs

      GeForce 9800M GT SLI GeForce GT 645M
    Power consumption (TDP) 130 Watt 32 Watt
    Interface PCIe 3.0 x16
    Memory type GDDR3 DDR3\GDDR5
    Maximum RAM amount 512 MB 2 GB
    Display Connectors No outputs
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    • GeForce 9800M GT SLI has 306% more power consumption, than GeForce GT 645M.
    • GeForce 9800M GT SLI has 510 GB more memory, than GeForce GT 645M.
    • Both cards are used in Laptops.
    • GeForce 9800M GT SLI is build with G9x architecture, and GeForce GT 645M - with Kepler.
    • GeForce 9800M GT SLI is manufactured by 65 nm process technology, and GeForce GT 645M - by 28 nm process technology.
    • Memory clock speed of GeForce GT 645M is 1000 MHz higher, than GeForce 9800M GT SLI.

    Game benchmarks

    high / 1080p 5−6 1−2
    ultra / 1080p 3−4 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 12−14
    medium / 1080p 7−8 2−3
    The average gaming FPS of GeForce 9800M GT SLI in Assassin's Creed Odyssey is 80% more, than GeForce GT 645M.

    Full Specs

      GeForce 9800M GT SLI GeForce GT 645M
    Architecture G9x Kepler
    Code name NB9E-GT2 N13P-GS
    Type Laptop Laptop
    Release date 15 July 2008 22 March 2012
    Pipelines 192 384
    Core clock speed 500 MHz
    Transistor count 1508 Million 1,270 million
    Manufacturing process technology 65 nm 28 nm
    Texture fill rate 22.7 billion/sec
    Floating-point performance 544.5 gflops
    Memory bus width 256 Bit 128bit
    Memory clock speed 800 MHz 1800 MHz
    Shared memory - -
    DirectX DirectX 10, Shader 4.0 12 API
    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 large medium sized
    Optimus +
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