Quadro K420 vs Radeon HD 6870

If you are going to buy a new graphics card and are choosing between Quadro K420 and Radeon HD 6870, 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 HD 6870, check out specs charts below.

Main Specs

  Quadro K420 Radeon HD 6870
Power consumption (TDP) 41 Watt 151 Watt
Interface PCIe 2.0 x16 PCIe 2.0 x16
Supplementary power connectors None 2x 6-pin
Memory type 128 Bit GDDR5
Maximum RAM amount 1 GB/2 GB 1 GB
Display Connectors 1x DVI, 1x DisplayPort 2x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 6870 has 268% more power consumption, than Quadro K420.
  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Quadro K420 and Radeon HD 6870 have maximum RAM of 1 GB.
  • Both cards are used in Desktops.
  • Quadro K420 is build with Kepler architecture, and Radeon HD 6870 - with Terascale 2.
  • Quadro K420 is manufactured by 28 nm process technology, and Radeon HD 6870 - by 40 nm process technology.
  • Radeon HD 6870 is 60 mm longer, than Quadro K420.
  • Memory clock speed of Quadro K420 is 732 MHz higher, than Radeon HD 6870.

Game benchmarks

high / 1080p 0−1 10−12
ultra / 1080p 0−1 6−7
QHD / 1440p 0−1 1−2
low / 720p 9−10 24−27
medium / 1080p 1−2 12−14
The average gaming FPS of Radeon HD 6870 in Assassin's Creed Odyssey is 280% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon HD 6870
Architecture Kepler Terascale 2
Code name GK107 RV940 Barts
Type Workstation Desktop
Release date 22 July 2014 22 October 2010
Pipelines 192 1120
Core clock speed 876 MHz
Boost Clock 900 MHz
Transistor count 1,270 million 1,700 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 14.02 50.40
Floating-point performance 336.4 gflops 2,016.0 gflops
Length 160 mm 220 mm
Memory bus width 128 Bit 256 Bit
Memory clock speed 1782 MHz 1050 MHz
Memory bandwidth 134.4 GB/s
Shared memory -
DirectX 12
Shader Model 5 5.0
OpenGL 4.5 4.4
OpenCL 1.2 1.2
Vulkan +
CUDA 3.0
Bus support PCIe 2.0 x16
HDMI +
Bitcoin / BTC (SHA256) 11 Mh/s 213 Mh/s
Eyefinity +
Design reference
CrossFire +
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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