Mobility Radeon HD 4870 vs Quadro K420

Find out if it is worth upgrading your current GPU setup by comparing Mobility Radeon HD 4870 and Quadro K420. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between Mobility Radeon HD 4870 and Quadro K420. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

Mobility Radeon HD 4870 is a Laptop Graphics Card

Note: Mobility Radeon HD 4870 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 4870 here:

Main Specs

  Mobility Radeon HD 4870 Quadro K420
Power consumption (TDP) 41 Watt
Interface PCIe 2.0 x16 PCIe 2.0 x16
Supplementary power connectors None
Memory type GDDR5 128 Bit
Maximum RAM amount 1 GB 1 GB/2 GB
Display Connectors No outputs 1x DVI, 1x DisplayPort
  Check Price Check Price
  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Mobility Radeon HD 4870 and Quadro K420 have maximum RAM of 1 GB.
  • Mobility Radeon HD 4870 is used in Laptops, and Quadro K420 - in Desktops.
  • Mobility Radeon HD 4870 is build with Terascale 1 architecture, and Quadro K420 - with Kepler.
  • Core clock speed of Quadro K420 is 326 MHz higher, than Mobility Radeon HD 4870.
  • Mobility Radeon HD 4870 is manufactured by 55 nm process technology, and Quadro K420 - by 28 nm process technology.
  • Memory clock speed of Quadro K420 is 894 MHz higher, than Mobility Radeon HD 4870.

Game benchmarks

high / 1080p 7−8 0−1
ultra / 1080p 4−5 0−1
QHD / 1440p 0−1 0−1
low / 720p 16−18 9−10
medium / 1080p 8−9 1−2
The average gaming FPS of Mobility Radeon HD 4870 in Assassin's Creed Odyssey is 140% more, than Quadro K420.

Full Specs

  Mobility Radeon HD 4870 Quadro K420
Architecture Terascale 1 Kepler
Code name M98-XT GK107
Type Laptop Workstation
Release date 9 January 2009 22 July 2014
Pipelines 800 192
Core clock speed 550 MHz 876 MHz
Transistor count 956 million 1,270 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 22.00 14.02
Floating-point performance 880.0 gflops 336.4 gflops
Length 160 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 888 MHz 1782 MHz
Memory bandwidth 56.83 GB/s
Shared memory -
DirectX 10.1 (10_1) 12
Shader Model 4.1 5
OpenGL 3.3 4.5
OpenCL 1.1 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 +
  Check Price Check Price