Quadro K420 vs Radeon RX 550X mobile

When choosing between Quadro K420 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 Quadro K420 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

  Quadro K420 Radeon RX 550X mobile
Power consumption (TDP) 41 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors None
Memory type 128 Bit GDDR5
Maximum RAM amount 1 GB/2 GB 4 GB
Display Connectors 1x DVI, 1x DisplayPort No outputs
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  • Radeon RX 550X mobile has 21% more power consumption, than Quadro K420.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon RX 550X mobile uses PCIe 3.0 x8 interface.
  • Radeon RX 550X mobile has 3 GB more memory, than Quadro K420.
  • Quadro K420 is used in Desktops, and Radeon RX 550X mobile - in Laptops.
  • Quadro K420 is build with Kepler architecture, and Radeon RX 550X mobile - with Polaris.
  • Core clock speed of Radeon RX 550X mobile is 300 MHz higher, than Quadro K420.
  • Quadro K420 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 5218 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 14−16
ultra / 1080p 0−1 9−10
QHD / 1440p 0−1 3−4
low / 720p 9−10 30−35
medium / 1080p 1−2 20−22
The average gaming FPS of Radeon RX 550X mobile in Assassin's Creed Odyssey is 420% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon RX 550X mobile
Architecture Kepler Polaris
Code name GK107 Polaris 12
Type Workstation Laptop
Release date 22 July 2014 10 January 2019
Pipelines 192 640
Core clock speed 876 MHz 1176 MHz
Boost Clock 1287 MHz
Transistor count 1,270 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 14.02 51.48
Floating-point performance 336.4 gflops
Length 160 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1782 MHz 7000 MHz
Memory bandwidth 96 GB/s
Shared memory -
DirectX 12 12 (12_0)
Shader Model 5 6.4
OpenGL 4.5 4.6
OpenCL 1.2 2.0
Vulkan + 1.2.131
CUDA 3.0
FreeSync +
Bitcoin / BTC (SHA256) 11 Mh/s
Laptop size large
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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