GeForce GTX 660 vs Radeon RX 550X mobile

When choosing between GeForce GTX 660 and Radeon RX 550X mobile, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GTX 660 and Radeon RX 550X mobile.

Radeon RX 550X mobile is a Laptop Graphics Card

Note: Radeon RX 550X mobile 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 Radeon RX 550X mobile here:

Main Specs

  GeForce GTX 660 Radeon RX 550X mobile
Power consumption (TDP) 140 Watt 50 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors One 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • GeForce GTX 660 has 180% more power consumption, than Radeon RX 550X mobile.
  • GeForce GTX 660 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 GTX 660.
  • GeForce GTX 660 is used in Desktops, and Radeon RX 550X mobile - in Laptops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon RX 550X mobile - with Polaris.
  • Core clock speed of Radeon RX 550X mobile is 196 MHz higher, than GeForce GTX 660.
  • GeForce GTX 660 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 6994 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 14−16
ultra / 1080p 12−14 9−10
QHD / 1440p 6−7 3−4
4K / 2160p 5−6
low / 720p 40−45 30−35
medium / 1080p 24−27 20−22
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 31% more, than Radeon RX 550X mobile.

Full Specs

  GeForce GTX 660 Radeon RX 550X mobile
Architecture Kepler Polaris
Code name GK106 Polaris 12
Type Desktop Laptop
Release date 6 September 2012 10 January 2019
Pipelines 960 640
Core clock speed 980 MHz 1176 MHz
Boost Clock 1033 MHz 1287 MHz
Transistor count 2,540 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 78.4 billion/sec 51.48
Floating-point performance 1,981 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 128 Bit
Memory clock speed 6.0 GB/s 7000 MHz
Memory bandwidth 144.2 GB/s 96 GB/s
Shared memory -
DirectX 12 (11_0) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.3 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
CUDA +
FreeSync +
CUDA cores 960
Bus support PCI Express 3.0
Height 4.376" (11.1 cm)
SLI options +
Multi monitor support 4 displays
HDMI +
HDCP +
Maximum VGA resolution 2048x1536
Audio input for HDMI Internal
3D Blu-Ray +
3D Gaming +
3D Vision +
Bitcoin / BTC (SHA256) 66 Mh/s
Laptop size large
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