Quadro K420 vs Radeon 520

If you are going to buy a new graphics card and are choosing between Quadro K420 and Radeon 520, 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 Quadro K420 stacks up against Radeon 520, check out specs charts below.

Radeon 520 is a Laptop Graphics Card

Note: Radeon 520 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 520 here:

Main Specs

  Quadro K420 Radeon 520
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 DDR3, GDDR5
Maximum RAM amount 1 GB/2 GB 2 GB
Display Connectors 1x DVI, 1x DisplayPort 1x DVI, 1x HDMI, 1x VGA
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  • Radeon 520 has 21% more power consumption, than Quadro K420.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon 520 uses PCIe 3.0 x8 interface.
  • Radeon 520 has 1 GB more memory, than Quadro K420.
  • Quadro K420 is used in Desktops, and Radeon 520 - in Laptops.
  • Quadro K420 is build with Kepler architecture, and Radeon 520 - with GCN 1.0.
  • Core clock speed of Radeon 520 is 154 MHz higher, than Quadro K420.
  • Quadro K420 and Radeon 520 are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon 520 is 468 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 0−1
ultra / 1080p 0−1
QHD / 1440p 0−1 0−1
low / 720p 9−10 1−2
medium / 1080p 1−2 0−1
The average gaming FPS of Quadro K420 in Assassin's Creed Odyssey is 800% more, than Radeon 520.

Full Specs

  Quadro K420 Radeon 520
Architecture Kepler GCN 1.0
Code name GK107 Oland
Type Workstation Laptop
Release date 22 July 2014 21 March 2017
Pipelines 192 320
Core clock speed 876 MHz 1030 MHz
Transistor count 1,270 million 1,040 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 14.02 20.60
Floating-point performance 336.4 gflops 659.2 gflops
Length 160 mm
Memory bus width 128 Bit 64 Bit
Memory clock speed 1782 MHz 2250 MHz
Memory bandwidth 16 GB/s
Shared memory -
DirectX 12 12.0
Shader Model 5 5.0
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan + +
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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