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    GeForce 9800M GT SLI vs GeForce GT 640M

    In this comparison between GeForce 9800M GT SLI and GeForce GT 640M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 9800M GT SLI will be the best choice, for others GeForce GT 640M will be their preference. Study the comparison tables below and make your choice.
    GeForce 9800M GT SLI Check Price
    GeForce GT 640M Check Price

    GeForce 9800M GT SLI and GeForce GT 640M are Laptop Graphics Cards

    Note: GeForce 9800M GT SLI and GeForce GT 640M 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 640M here:

    GeForce 9800M GT SLI Laptops
    GeForce GT 640M Laptops

    Main Specs

      GeForce 9800M GT SLI GeForce GT 640M
    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 640M.
    • GeForce 9800M GT SLI has 510 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce 9800M GT SLI is build with G9x architecture, and GeForce GT 640M - with Kepler.
    • GeForce 9800M GT SLI is manufactured by 65 nm process technology, and GeForce GT 640M - by 28 nm process technology.
    • Memory clock speed of GeForce GT 640M is 1000 MHz higher, than GeForce 9800M GT SLI.

    Game benchmarks

    high / 1080p 5−6 0−1
    ultra / 1080p 3−4 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 10−12
    medium / 1080p 7−8 2−3
    The average gaming FPS of GeForce 9800M GT SLI in Assassin's Creed Odyssey is 83% more, than GeForce GT 640M.

    Full Specs

      GeForce 9800M GT SLI GeForce GT 640M
    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
    Boost Clock 645 MHz
    Transistor count 1508 Million 1,270 million
    Manufacturing process technology 65 nm 28 nm
    Floating-point performance 480.0 gflops
    Memory bus width 256 Bit 128bit
    Memory clock speed 800 MHz 1800 - 4000 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) 18 Mh/s
    Laptop size large medium sized
    Optimus +
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