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    GeForce GTX 660M vs Radeon RX 550X

    If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Radeon RX 550X, 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 GTX 660M stacks up against Radeon RX 550X, check out specs charts below.
    GeForce GTX 660M Check Price
    Radeon RX 550X

    GeForce GTX 660M is a Laptop Graphics Card

    Note: GeForce GTX 660M 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 GTX 660M here:

    GeForce GTX 660M Laptops

    Main Specs

      GeForce GTX 660M Radeon RX 550X
    Power consumption (TDP) 50 Watt 50 Watt
    Interface MXM-B (3.0) PCIe 3.0 x8
    Supplementary power connectors None
    Memory type GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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    • Both graphics cards have the same power consumption of 50 Watt.
    • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon RX 550X uses PCIe 3.0 x8 interface.
    • Radeon RX 550X has 2 GB more memory, than GeForce GTX 660M.
    • GeForce GTX 660M is used in Laptops, and Radeon RX 550X - in Desktops.
    • GeForce GTX 660M is build with Kepler architecture, and Radeon RX 550X - with GCN 4.0.
    • Core clock speed of Radeon RX 550X is 265 MHz higher, than GeForce GTX 660M.
    • GeForce GTX 660M is manufactured by 28 nm process technology, and Radeon RX 550X - by 14 nm process technology.
    • Memory clock speed of Radeon RX 550X is 4000 MHz higher, than GeForce GTX 660M.

    Game benchmarks

    high / 1080p 6−7 10−11
    ultra / 1080p 4−5 6−7
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 21−24
    medium / 1080p 8−9 12−14
    The average gaming FPS of Radeon RX 550X in Assassin's Creed Odyssey is 44% more, than GeForce GTX 660M.

    Full Specs

      GeForce GTX 660M Radeon RX 550X
    Architecture Kepler GCN 4.0
    Code name N13E-GE Lexa
    Type Laptop Desktop
    Release date 22 March 2012 16 December 2018
    Pipelines 384 512
    Core clock speed 835 MHz 1100 MHz
    Boost Clock 950 MHz 1183 MHz
    Transistor count 1,270 million 2,200 million
    Manufacturing process technology 28 nm 14 nm
    Texture fill rate 30.4 billion/sec 37.86
    Floating-point performance 729.6 gflops 1,211 gflops
    Length 145 mm
    Memory bus width 128bit 128 Bit
    Memory clock speed 2000 MHz 6000 MHz
    Memory bandwidth 64.0 GB/s 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 +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    SLI options +
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    Bitcoin / BTC (SHA256) 36 Mh/s
    Laptop size large
    Optimus +
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