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    GeForce GT 640M vs Radeon R9 M390X

    When choosing between GeForce GT 640M and Radeon R9 M390X, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GT 640M and Radeon R9 M390X.
    GeForce GT 640M Check Price
    Radeon R9 M390X Check Price

    GeForce GT 640M and Radeon R9 M390X are Laptop Graphics Cards

    Note: GeForce GT 640M and Radeon R9 M390X 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 R9 M390X here:

    GeForce GT 640M Laptops
    Radeon R9 M390X Laptops

    Main Specs

      GeForce GT 640M Radeon R9 M390X
    Power consumption (TDP) 32 Watt 100 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon R9 M390X has 212% more power consumption, than GeForce GT 640M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • Radeon R9 M390X has 2 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Radeon R9 M390X - with GCN 3.
    • GeForce GT 640M and Radeon R9 M390X are manufactured by 28 nm process technology.

    Game benchmarks

    high / 1080p 0−1 21−24
    ultra / 1080p 0−1 12−14
    QHD / 1440p 0−1 8−9
    4K / 2160p − 5−6
    low / 720p 10−12 40−45
    medium / 1080p 2−3 27−30
    The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 483% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Radeon R9 M390X
    Architecture Kepler GCN 3
    Code name N13P-GS Amethyst (XT) / Tonga
    Type Laptop Laptop
    Release date 22 March 2012 9 June 2015
    Pipelines 384 2048
    Core clock speed 723 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 5,000 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 92.54
    Floating-point performance 480.0 gflops 2,961 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz
    Memory bandwidth 160.0 GB/s
    Shared memory - -
    DirectX 12 API
    Shader Model 5.1 6.3
    OpenGL 4.5 4.4
    OpenCL 1.1 Not Listed
    Vulkan 1.1.126 +
    CUDA +
    FreeSync +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0 PCIe 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 +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
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