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    GeForce GT 640M vs Radeon HD 6990M

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon HD 6990M. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GT 640M and Radeon HD 6990M. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
    GeForce GT 640M Check Price
    Radeon HD 6990M Check Price

    GeForce GT 640M and Radeon HD 6990M are Laptop Graphics Cards

    Note: GeForce GT 640M and Radeon HD 6990M 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 6990M here:

    GeForce GT 640M Laptops
    Radeon HD 6990M Laptops

    Main Specs

      GeForce GT 640M Radeon HD 6990M
    Power consumption (TDP) 32 Watt 100 Watt
    Interface PCIe 3.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • Radeon HD 6990M has 212% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 6990M uses MXM-B (3.0) interface.
    • GeForce GT 640M and Radeon HD 6990M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Radeon HD 6990M - with Terascale 2.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon HD 6990M - by 40 nm process technology.
    • Memory clock speed of GeForce GT 640M is 900 MHz higher, than Radeon HD 6990M.

    Game benchmarks

    high / 1080p 0−1 14−16
    ultra / 1080p 0−1 8−9
    QHD / 1440p 0−1 3−4
    low / 720p 10−12 30−33
    medium / 1080p 2−3 16−18
    The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 300% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Radeon HD 6990M
    Architecture Kepler Terascale 2
    Code name N13P-GS Blackcomb XTX
    Type Laptop Laptop
    Release date 22 March 2012 12 July 2011
    Pipelines 384 1120
    Core clock speed 715 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 1,700 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 40.04
    Floating-point performance 480.0 gflops 1,601.6 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz 900 MHz
    Memory bandwidth 115.2 GB/s
    Shared memory - -
    DirectX 12 API 11.2 (11_0)
    Shader Model 5.1 5.0
    OpenGL 4.5 4.4
    OpenCL 1.1 1.2
    Vulkan 1.1.126 N/A
    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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