Quadro K420 vs Radeon HD 7850M

When comparing Quadro K420 and Radeon HD 7850M, 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 7850M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon HD 7850M is a Laptop Graphics Card

Note: Radeon HD 7850M 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 7850M here:

Main Specs

  Quadro K420 Radeon HD 7850M
Power consumption (TDP) 41 Watt 40 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors None
Memory type 128 Bit GDDR5
Maximum RAM amount 1 GB/2 GB 2 GB
Display Connectors 1x DVI, 1x DisplayPort No outputs
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  • Quadro K420 has 2% more power consumption, than Radeon HD 7850M.
  • Quadro K420 is connected by PCIe 2.0 x16, and Radeon HD 7850M uses PCIe 3.0 x16 interface.
  • Radeon HD 7850M has 1 GB more memory, than Quadro K420.
  • Quadro K420 is used in Desktops, and Radeon HD 7850M - in Laptops.
  • Quadro K420 is build with Kepler architecture, and Radeon HD 7850M - with GCN.
  • Core clock speed of Quadro K420 is 201 MHz higher, than Radeon HD 7850M.
  • Quadro K420 and Radeon HD 7850M are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 7850M is 2218 MHz higher, than Quadro K420.

Game benchmarks

high / 1080p 0−1 6−7
ultra / 1080p 0−1 3−4
QHD / 1440p 0−1 0−1
low / 720p 9−10 14−16
medium / 1080p 1−2 7−8
The average gaming FPS of Radeon HD 7850M in Assassin's Creed Odyssey is 120% more, than Quadro K420.

Full Specs

  Quadro K420 Radeon HD 7850M
Architecture Kepler GCN
Code name GK107 Heathrow Pro
Type Workstation Laptop
Release date 22 July 2014 24 April 2012
Pipelines 192 640
Core clock speed 876 MHz 675 MHz
Transistor count 1,270 million 1,500 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 14.02 27.00
Floating-point performance 336.4 gflops 864.0 gflops
Length 160 mm
Memory bus width 128 Bit 128 Bit
Memory clock speed 1782 MHz 4000 MHz
Memory bandwidth 64 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
Laptop size large
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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