Quadro K420 vs Radeon HD 8870M

Find out if it is worth upgrading your current GPU setup by comparing Quadro K420 and Radeon HD 8870M. 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 Quadro K420 and Radeon HD 8870M. 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.

Radeon HD 8870M is a Laptop Graphics Card

Note: Radeon HD 8870M 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 HD 8870M here:

Main Specs

  Quadro K420 Radeon HD 8870M
Power consumption (TDP) 41 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors None
Memory type 128 Bit GDDR5, DDR3
Maximum RAM amount 1 GB/2 GB 2 GB
Display Connectors 1x DVI, 1x DisplayPort No outputs
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  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon HD 8870M uses PCIe 3.0 x16 interface.
  • Radeon HD 8870M has 1 GB more memory, than Quadro K420.
  • Quadro K420 is used in Desktops, and Radeon HD 8870M - in Laptops.
  • Quadro K420 is build with Kepler architecture, and Radeon HD 8870M - with GCN.
  • Core clock speed of Quadro K420 is 151 MHz higher, than Radeon HD 8870M.
  • Quadro K420 and Radeon HD 8870M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 8870M is 2718 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 7−8
ultra / 1080p 0−1 4−5
QHD / 1440p 0−1 0−1
low / 720p 9−10 18−20
medium / 1080p 1−2 9−10
The average gaming FPS of Radeon HD 8870M in Assassin's Creed Odyssey is 180% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon HD 8870M
Architecture Kepler GCN
Code name GK107 Venus
Type Workstation Laptop
Release date 22 July 2014 18 December 2012
Pipelines 192 640
Core clock speed 876 MHz 725 MHz
Boost Clock 775 MHz
Transistor count 1,270 million 1,500 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 14.02 31.00
Floating-point performance 336.4 gflops 992.0 gflops
Length 160 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1782 MHz 4500 MHz
Memory bandwidth 72 GB/s
Shared memory -
DirectX 12 12 (11_1)
Shader Model 5 5.1
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan + 1.2.131
CUDA 3.0
Bitcoin / BTC (SHA256) 11 Mh/s 107 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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