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    GeForce GT 640M vs Radeon HD 7970M Crossfire

    In this comparison between GeForce GT 640M and Radeon HD 7970M Crossfire 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 GT 640M will be the best choice, for others Radeon HD 7970M Crossfire will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 640M Check Price
    Radeon HD 7970M Crossfire Check Price

    GeForce GT 640M and Radeon HD 7970M Crossfire are Laptop Graphics Cards

    Note: GeForce GT 640M and Radeon HD 7970M Crossfire 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 Radeon HD 7970M Crossfire here:

    GeForce GT 640M Laptops
    Radeon HD 7970M Crossfire Laptops

    Main Specs

      GeForce GT 640M Radeon HD 7970M Crossfire
    Power consumption (TDP) 32 Watt 200 Watt
    Interface PCIe 3.0 x16
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB
    Display Connectors No outputs
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    • Radeon HD 7970M Crossfire has 525% more power consumption, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Radeon HD 7970M Crossfire - with GCN.
    • GeForce GT 640M and Radeon HD 7970M Crossfire are manufactured by 28 nm process technology.
    • Memory clock speed of Radeon HD 7970M Crossfire is 3000 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 35−40
    ultra / 1080p 0−1 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 10−12 60−65
    medium / 1080p 2−3 40−45
    The average gaming FPS of Radeon HD 7970M Crossfire in Assassin's Creed Odyssey is 766% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Radeon HD 7970M Crossfire
    Architecture Kepler GCN
    Code name N13P-GS Wimbledon XT
    Type Laptop Laptop
    Release date 22 March 2012 1 May 2012
    Pipelines 384 2560
    Core clock speed 850 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Floating-point performance 480.0 gflops
    Memory bus width 128bit 2x 256 Bit
    Memory clock speed 1800 - 4000 MHz 4800 MHz
    Shared memory - -
    DirectX 12 API DirectX 11.1, 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
    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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