Quadro K420 vs Radeon Pro 455

When comparing Quadro K420 and Radeon Pro 455, 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 Quadro K420 and Radeon Pro 455 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon Pro 455 is a Laptop Graphics Card

Note: Radeon Pro 455 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 Pro 455 here:

Main Specs

  Quadro K420 Radeon Pro 455
Power consumption (TDP) 41 Watt 35 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 2 GB
Display Connectors 1x DVI, 1x DisplayPort No outputs
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  • Quadro K420 has 17% more power consumption, than Radeon Pro 455.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon Pro 455 uses PCIe 3.0 x8 interface.
  • Radeon Pro 455 has 1 GB more memory, than Quadro K420.
  • Quadro K420 is used in Desktops, and Radeon Pro 455 - in Mobile workstations.
  • Quadro K420 is build with Kepler architecture, and Radeon Pro 455 - with Polaris.
  • Core clock speed of Quadro K420 is 21 MHz higher, than Radeon Pro 455.
  • Quadro K420 is manufactured by 28 nm process technology, and Radeon Pro 455 - by 14 nm process technology.
  • Memory clock speed of Radeon Pro 455 is 3218 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 16−18
ultra / 1080p 0−1 9−10
QHD / 1440p 0−1 4−5
4K / 2160p 4−5
low / 720p 9−10 30−35
medium / 1080p 1−2 20−22
The average gaming FPS of Radeon Pro 455 in Assassin's Creed Odyssey is 420% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon Pro 455
Architecture Kepler Polaris
Code name GK107 Polaris 11
Type Workstation Mobile workstation
Release date 22 July 2014 27 October 2016
Pipelines 192 768
Core clock speed 876 MHz 855 MHz
Transistor count 1,270 million 3,000 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 14.02 41.04
Floating-point performance 336.4 gflops 1,313 gflops
Length 160 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1782 MHz 5000 MHz
Memory bandwidth 81.28 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 163 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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