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    GeForce GT 640M vs Mobility Radeon HD 3870 X2

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Mobility Radeon HD 3870 X2. 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 Mobility Radeon HD 3870 X2. 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
    Mobility Radeon HD 3870 X2 Check Price

    GeForce GT 640M and Mobility Radeon HD 3870 X2 are Laptop Graphics Cards

    Note: GeForce GT 640M and Mobility Radeon HD 3870 X2 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 Mobility Radeon HD 3870 X2 here:

    GeForce GT 640M Laptops
    Mobility Radeon HD 3870 X2 Laptops

    Main Specs

      GeForce GT 640M Mobility Radeon HD 3870 X2
    Power consumption (TDP) 32 Watt 110 Watt
    Interface PCIe 3.0 x16 PCIe 2.0 x16
    Memory type DDR3\GDDR5 GDDR3
    Maximum RAM amount 2 GB 512 MB
    Display Connectors No outputs No outputs
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    • Mobility Radeon HD 3870 X2 has 243% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
    • Mobility Radeon HD 3870 X2 has 510 GB more memory, than GeForce GT 640M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.
    • Memory clock speed of GeForce GT 640M is 950 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 0−1 6−7
    ultra / 1080p 0−1 4−5
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 16−18
    medium / 1080p 2−3 8−9
    The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 100% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Mobility Radeon HD 3870 X2
    Architecture Kepler RV6xx
    Code name N13P-GS M88-XT CF
    Type Laptop Laptop
    Release date 22 March 2012 1 September 2008
    Pipelines 384 640
    Core clock speed 660 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 666 million
    Manufacturing process technology 28 nm 55 nm
    Texture fill rate 10.56
    Floating-point performance 480.0 gflops 2x 422.4 gflops
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz 850 MHz
    Memory bandwidth 54.4 GB/s
    Shared memory - -
    DirectX 12 API 10.1 (10_1)
    Shader Model 5.1 4.1
    OpenGL 4.5 3.3
    OpenCL 1.1 N/A
    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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