Mobility Radeon HD 5870 vs Quadro K420

If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 5870 and Quadro K420, 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 Mobility Radeon HD 5870 stacks up against Quadro K420, check out specs charts below.

Mobility Radeon HD 5870 is a Laptop Graphics Card

Note: Mobility Radeon HD 5870 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 Mobility Radeon HD 5870 here:

Main Specs

  Mobility Radeon HD 5870 Quadro K420
Power consumption (TDP) 50 Watt 41 Watt
Interface MXM-B (3.0) PCIe 2.0 x16
Supplementary power connectors None
Memory type DDR3, GDDR3, GDDR5 128 Bit
Maximum RAM amount 1 GB 1 GB/2 GB
Display Connectors No outputs 1x DVI, 1x DisplayPort
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  • Mobility Radeon HD 5870 has 21% more power consumption, than Quadro K420.
  • Mobility Radeon HD 5870 is connected by MXM-B (3.0), and Quadro K420 uses PCIe 2.0 x16 interface.
  • Mobility Radeon HD 5870 and Quadro K420 have maximum RAM of 1 GB.
  • Mobility Radeon HD 5870 is used in Laptops, and Quadro K420 - in Desktops.
  • Mobility Radeon HD 5870 is build with Terascale 2 architecture, and Quadro K420 - with Kepler.
  • Core clock speed of Quadro K420 is 176 MHz higher, than Mobility Radeon HD 5870.
  • Mobility Radeon HD 5870 is manufactured by 40 nm process technology, and Quadro K420 - by 28 nm process technology.
  • Memory clock speed of Quadro K420 is 782 MHz higher, than Mobility Radeon HD 5870.

Game benchmarks

high / 1080p 10−11 0−1
ultra / 1080p 6−7 0−1
QHD / 1440p 0−1 0−1
low / 720p 21−24 9−10
medium / 1080p 12−14 1−2
The average gaming FPS of Mobility Radeon HD 5870 in Assassin's Creed Odyssey is 240% more, than Quadro K420.

Full Specs

  Mobility Radeon HD 5870 Quadro K420
Architecture Terascale 2 Kepler
Code name Broadway-XT GK107
Type Laptop Workstation
Release date 7 January 2010 22 July 2014
Pipelines 800 192
Core clock speed 700 MHz 876 MHz
Transistor count 1,040 million 1,270 million
Manufacturing process technology 40 nm 28 nm
Texture fill rate 28.00 14.02
Floating-point performance 1,120.0 gflops 336.4 gflops
Length 160 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1000 MHz 1782 MHz
Memory bandwidth 64 GB/s
Shared memory -
DirectX 11.2 (11_0) 12
Shader Model 5.0 5
OpenGL 4.4 4.5
OpenCL 1.2 1.2
Vulkan N/A +
CUDA 3.0
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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