Quadro K420 vs Radeon RX 550X

In this comparison between Quadro K420 and Radeon RX 550X you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Quadro K420 will be the best choice, for others Radeon RX 550X will be their preference. Study the comparison tables below and make your choice.

Main Specs

  Quadro K420 Radeon RX 550X
Power consumption (TDP) 41 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors None None
Memory type 128 Bit GDDR5
Maximum RAM amount 1 GB/2 GB 4 GB
Display Connectors 1x DVI, 1x DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon RX 550X has 21% more power consumption, than Quadro K420.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon RX 550X uses PCIe 3.0 x8 interface.
  • Radeon RX 550X has 3 GB more memory, than Quadro K420.
  • Both cards are used in Desktops.
  • Quadro K420 is build with Kepler architecture, and Radeon RX 550X - with GCN 4.0.
  • Core clock speed of Radeon RX 550X is 224 MHz higher, than Quadro K420.
  • Quadro K420 is manufactured by 28 nm process technology, and Radeon RX 550X - by 14 nm process technology.
  • Quadro K420 is 15 mm longer, than Radeon RX 550X.
  • Memory clock speed of Radeon RX 550X is 4218 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 10−11
ultra / 1080p 0−1 6−7
QHD / 1440p 0−1 0−1
low / 720p 9−10 21−24
medium / 1080p 1−2 12−14
The average gaming FPS of Radeon RX 550X in Assassin's Creed Odyssey is 240% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon RX 550X
Architecture Kepler GCN 4.0
Code name GK107 Lexa
Type Workstation Desktop
Release date 22 July 2014 16 December 2018
Pipelines 192 512
Core clock speed 876 MHz 1100 MHz
Boost Clock 1183 MHz
Transistor count 1,270 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 14.02 37.86
Floating-point performance 336.4 gflops 1,211 gflops
Length 160 mm 145 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1782 MHz 6000 MHz
Memory bandwidth 96 GB/s
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
Bitcoin / BTC (SHA256) 11 Mh/s
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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