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    GeForce GT 645M vs Radeon HD 6550A

    If you are going to buy a new graphics card and are choosing between GeForce GT 645M and Radeon HD 6550A, 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 645M stacks up against Radeon HD 6550A, check out specs charts below.
    GeForce GT 645M Check Price
    Radeon HD 6550A

    GeForce GT 645M is a Laptop Graphics Card

    Note: GeForce GT 645M is only used in laptop graphics. It has 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 645M here:

    GeForce GT 645M Laptops

    Main Specs

      GeForce GT 645M Radeon HD 6550A
    Power consumption (TDP) 32 Watt 35 Watt
    Interface PCIe 3.0 x16 MXM-A (3.0)
    Memory type DDR3\GDDR5 GDDR3
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • Radeon HD 6550A has 9% more power consumption, than GeForce GT 645M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon HD 6550A uses MXM-A (3.0) interface.
    • GeForce GT 645M and Radeon HD 6550A have maximum RAM of 2 GB.
    • GeForce GT 645M is used in Laptops, and Radeon HD 6550A - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and Radeon HD 6550A - with TeraScale 2.
    • GeForce GT 645M is manufactured by 28 nm process technology, and Radeon HD 6550A - by 40 nm process technology.
    • Memory clock speed of GeForce GT 645M is 200 MHz higher, than Radeon HD 6550A.

    Game benchmarks

    high / 1080p 1−2 0−1
    ultra / 1080p 0−1 −
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 1−2
    medium / 1080p 2−3 0−1
    The average gaming FPS of GeForce GT 645M in Assassin's Creed Odyssey is 1200% more, than Radeon HD 6550A.

    Full Specs

      GeForce GT 645M Radeon HD 6550A
    Architecture Kepler TeraScale 2
    Code name N13P-GS Pinewood
    Type Laptop Desktop
    Release date 22 March 2012 7 February 2011
    Pipelines 384 480
    Core clock speed 550 MHz
    Transistor count 1,270 million 627 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 22.7 billion/sec 13.20
    Floating-point performance 544.5 gflops 624.0 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 MHz 1600 MHz
    Memory bandwidth 25.6 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 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) 19 Mh/s
    Laptop size medium sized
    Optimus +
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