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    GeForce GT 640M LE vs Radeon HD 6990M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M LE and Radeon HD 6990M, 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 640M LE stacks up against Radeon HD 6990M, check out specs charts below.
    GeForce GT 640M LE Check Price
    Radeon HD 6990M Check Price

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

    Note: GeForce GT 640M LE 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 LE or Radeon HD 6990M here:

    GeForce GT 640M LE Laptops
    Radeon HD 6990M Laptops

    Main Specs

      GeForce GT 640M LE Radeon HD 6990M
    Power consumption (TDP) 20 Watt 100 Watt
    Interface PCIe 2.0 x16 MXM-B (3.0)
    Supplementary power connectors None
    Memory type DDR3\DDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • Radeon HD 6990M has 400% more power consumption, than GeForce GT 640M LE.
    • GeForce GT 640M LE is connected by PCIe 2.0 x16, and Radeon HD 6990M uses MXM-B (3.0) interface.
    • GeForce GT 640M LE and Radeon HD 6990M have maximum RAM of 2 GB.
    • Both cards are used in Laptops.
    • GeForce GT 640M LE is build with Fermi / Kepler architecture, and Radeon HD 6990M - with Terascale 2.
    • GeForce GT 640M LE is manufactured by 28 nm process technology, and Radeon HD 6990M - by 40 nm process technology.
    • Memory clock speed of GeForce GT 640M LE is 900 MHz higher, than Radeon HD 6990M.

    Game benchmarks

    high / 1080p 0−1 14−16
    ultra / 1080p − 8−9
    QHD / 1440p 0−1 3−4
    low / 720p 1−2 30−33
    medium / 1080p 0−1 16−18
    The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 3000% more, than GeForce GT 640M LE.

    Full Specs

      GeForce GT 640M LE Radeon HD 6990M
    Architecture Fermi / Kepler Terascale 2
    Code name N13P-LP Blackcomb XTX
    Type Laptop Laptop
    Release date 22 March 2012 12 July 2011
    Pipelines 384 1120
    Core clock speed 715 MHz
    Transistor count 585 million 1,700 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 40.04
    Floating-point performance 384.0 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 N/A N/A
    CUDA +
    CUDA cores Up to 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) 14 Mh/s
    Laptop size medium sized large
    Optimus +
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