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    GeForce GT 645M vs Radeon RX 550X mobile

    When comparing GeForce GT 645M and Radeon RX 550X mobile, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 645M and Radeon RX 550X mobile is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GT 645M Check Price
    Radeon RX 550X mobile Check Price

    GeForce GT 645M and Radeon RX 550X mobile are Laptop Graphics Cards

    Note: GeForce GT 645M and Radeon RX 550X mobile 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 645M or Radeon RX 550X mobile here:

    GeForce GT 645M Laptops
    Radeon RX 550X mobile Laptops

    Main Specs

      GeForce GT 645M Radeon RX 550X mobile
    Power consumption (TDP) 32 Watt 50 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x8
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon RX 550X mobile has 56% more power consumption, than GeForce GT 645M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and Radeon RX 550X mobile uses PCIe 3.0 x8 interface.
    • Radeon RX 550X mobile has 2 GB more memory, than GeForce GT 645M.
    • Both cards are used in Laptops.
    • GeForce GT 645M is build with Kepler architecture, and Radeon RX 550X mobile - with Polaris.
    • GeForce GT 645M is manufactured by 28 nm process technology, and Radeon RX 550X mobile - by 14 nm process technology.
    • Memory clock speed of Radeon RX 550X mobile is 5200 MHz higher, than GeForce GT 645M.

    Game benchmarks

    high / 1080p 1−2 14−16
    ultra / 1080p 0−1 9−10
    QHD / 1440p 0−1 3−4
    low / 720p 12−14 30−35
    medium / 1080p 2−3 20−22
    The average gaming FPS of Radeon RX 550X mobile in Assassin's Creed Odyssey is 340% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M Radeon RX 550X mobile
    Architecture Kepler Polaris
    Code name N13P-GS Polaris 12
    Type Laptop Laptop
    Release date 22 March 2012 10 January 2019
    Pipelines 384 640
    Core clock speed 1176 MHz
    Boost Clock 1287 MHz
    Transistor count 1,270 million 2,200 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 22.7 billion/sec 51.48
    Floating-point performance 544.5 gflops
    Memory bus width 128bit 128 Bit
    Memory clock speed 1800 MHz 7000 MHz
    Memory bandwidth 96 GB/s
    Shared memory - -
    DirectX 12 API 12 (12_0)
    Shader Model 5.1 6.4
    OpenGL 4.5 4.6
    OpenCL 1.1 2.0
    Vulkan 1.1.126 1.2.131
    CUDA +
    FreeSync +
    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 large
    Optimus +
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