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    GeForce GT 640M vs Radeon HD 7770M

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 640M and Radeon HD 7770M. 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 7770M. 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 7770M Check Price

    GeForce GT 640M and Radeon HD 7770M are Laptop Graphics Cards

    Note: GeForce GT 640M and Radeon HD 7770M 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 7770M here:

    GeForce GT 640M Laptops
    Radeon HD 7770M Laptops

    Main Specs

      GeForce GT 640M Radeon HD 7770M
    Power consumption (TDP) 32 Watt 32 Watt
    Interface PCIe 3.0 x16 PCIe 2.0 x16
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 1 GB
    Display Connectors No outputs No outputs
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    • Both graphics cards have the same power consumption of 32 Watt.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 7770M uses PCIe 2.0 x16 interface.
    • GeForce GT 640M has 1 GB more memory, than Radeon HD 7770M.
    • Both cards are used in Laptops.
    • GeForce GT 640M is build with Kepler architecture, and Radeon HD 7770M - with GCN.
    • GeForce GT 640M and Radeon HD 7770M are manufactured by 28 nm process technology.
    • Memory clock speed of Radeon HD 7770M is 2200 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 9−10
    ultra / 1080p 0−1 5−6
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 21−24
    medium / 1080p 2−3 10−12
    The average gaming FPS of Radeon HD 7770M in Assassin's Creed Odyssey is 166% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Radeon HD 7770M
    Architecture Kepler GCN
    Code name N13P-GS Chelsea XT
    Type Laptop Laptop
    Release date 22 March 2012 24 April 2012
    Pipelines 384 512
    Core clock speed 675 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 1,500 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 21.60
    Floating-point performance 480.0 gflops 691.2 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 - 4000 MHz 4000 MHz
    Memory bandwidth 64 GB/s
    Shared memory - -
    DirectX 12 API 12 (11_1)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.6
    OpenCL 1.1 1.2
    Vulkan 1.1.126 1.2.131
    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 medium sized
    Optimus +
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