Quadro K420 vs Radeon HD 7970

When comparing Quadro K420 and Radeon HD 7970, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between Quadro K420 and Radeon HD 7970 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Main Specs

  Quadro K420 Radeon HD 7970
Power consumption (TDP) 41 Watt 300 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors None 1x 6-pin + 1x 8-pin
Memory type 128 Bit GDDR5
Maximum RAM amount 1 GB/2 GB 3 GB
Display Connectors 1x DVI, 1x DisplayPort 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 7970 has 631% more power consumption, than Quadro K420.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon HD 7970 uses PCIe 3.0 x16 interface.
  • Radeon HD 7970 has 2 GB more memory, than Quadro K420.
  • Both cards are used in Desktops.
  • Quadro K420 is build with Kepler architecture, and Radeon HD 7970 - with GCN.
  • Quadro K420 and Radeon HD 7970 are manufactured by 28 nm process technology.
  • Radeon HD 7970 is 114 mm longer, than Quadro K420.
  • Memory clock speed of Quadro K420 is 407 MHz higher, than Radeon HD 7970.

Game benchmarks

high / 1080p 0−1 35−40
ultra / 1080p 0−1 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 9−10 60−65
medium / 1080p 1−2 40−45
The average gaming FPS of Radeon HD 7970 in Assassin's Creed Odyssey is 940% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon HD 7970
Architecture Kepler GCN
Code name GK107 Tahiti XT
Type Workstation Desktop
Release date 22 July 2014 22 December 2011
Pipelines 192 2048
Core clock speed 876 MHz
Boost Clock 925 MHz
Transistor count 1,270 million 4,313 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 14.02 118.4
Floating-point performance 336.4 gflops 3,789 gflops
Length 160 mm 274 mm
Memory bus width 128 Bit 384 Bit
Memory clock speed 1782 MHz 1375 MHz
Memory bandwidth 264 GB/s
Shared memory -
DirectX 12
Shader Model 5 5.1
OpenGL 4.5 4.6
OpenCL 1.2 1.2
Vulkan +
CUDA 3.0
FreeSync +
Bus support PCIe 2.1 x16
HDMI +
Bitcoin / BTC (SHA256) 11 Mh/s 485 Mh/s
Eyefinity +
Design reference
CrossFire +
Ethereum / ETH (DaggerHashimoto) 20.71 Mh/s
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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