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    GeForce GT 640M vs Radeon R7 M340

    When choosing between GeForce GT 640M and Radeon R7 M340, 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 R7 M340.
    GeForce GT 640M Check Price
    Radeon R7 M340 Check Price

    GeForce GT 640M and Radeon R7 M340 are Laptop Graphics Cards

    Note: GeForce GT 640M and Radeon R7 M340 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 R7 M340 here:

    GeForce GT 640M Laptops
    Radeon R7 M340 Laptops

    Main Specs

      GeForce GT 640M Radeon R7 M340
    Power consumption (TDP) 32 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type DDR3\GDDR5 DDR3
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon R7 M340 uses PCIe 3.0 x8 interface.
    • Radeon R7 M340 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 R7 M340 - with GCN.
    • GeForce GT 640M and Radeon R7 M340 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 640M is 800 MHz higher, than Radeon R7 M340.

    Game benchmarks

    high / 1080p 0−1 0−1
    ultra / 1080p 0−1 −
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 1−2
    medium / 1080p 2−3 0−1
    The average gaming FPS of GeForce GT 640M in Assassin's Creed Odyssey is 1000% more, than Radeon R7 M340.

    Full Specs

      GeForce GT 640M Radeon R7 M340
    Architecture Kepler GCN
    Code name N13P-GS Meso Pro DDR3
    Type Laptop Laptop
    Release date 22 March 2012 16 June 2015
    Pipelines 384 320
    Core clock speed 1021 MHz
    Boost Clock 645 MHz 1021 MHz
    Transistor count 1,270 million 950 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 17.16
    Floating-point performance 480.0 gflops 549.1 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 - 4000 MHz 1000 MHz
    Memory bandwidth 16 GB/s
    Shared memory - -
    DirectX 12 API
    Shader Model 5.1 5.1
    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 74 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 6
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