Mobility Radeon HD 3870 X2 vs Quadro M620

In this comparison between Mobility Radeon HD 3870 X2 and Quadro M620 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Mobility Radeon HD 3870 X2 will be the best choice, for others Quadro M620 will be their preference. Study the comparison tables below and make your choice.

Mobility Radeon HD 3870 X2 and Quadro M620 are Laptop Graphics Cards

Note: Mobility Radeon HD 3870 X2 and Quadro M620 are only used in laptop graphics. They have 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 3870 X2 or Quadro M620 here:

Main Specs

  Mobility Radeon HD 3870 X2 Quadro M620
Power consumption (TDP) 110 Watt 30 Watt
Interface PCIe 2.0 x16
Memory type GDDR3 GDDR5
Maximum RAM amount 512 MB 2 GB
Display Connectors No outputs
  Check Price Check Price
  • Mobility Radeon HD 3870 X2 has 266% more power consumption, than Quadro M620.
  • Mobility Radeon HD 3870 X2 has 510 GB more memory, than Quadro M620.
  • Mobility Radeon HD 3870 X2 is used in Laptops, and Quadro M620 - in Mobile workstations.
  • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Quadro M620 - with Maxwell.
  • Core clock speed of Quadro M620 is 358 MHz higher, than Mobility Radeon HD 3870 X2.
  • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Quadro M620 - by 28 nm process technology.
  • Memory clock speed of Quadro M620 is 4162 MHz higher, than Mobility Radeon HD 3870 X2.

Game benchmarks

high / 1080p 6−7 14−16
ultra / 1080p 4−5 8−9
QHD / 1440p 0−1 3−4
low / 720p 16−18 30−35
medium / 1080p 8−9 18−20
The average gaming FPS of Quadro M620 in Assassin's Creed Odyssey is 100% more, than Mobility Radeon HD 3870 X2.

Full Specs

  Mobility Radeon HD 3870 X2 Quadro M620
Architecture RV6xx Maxwell
Code name M88-XT CF
Type Laptop Mobile workstation
Release date 1 September 2008 13 January 2017
Pipelines 640 512
Core clock speed 660 MHz 1018 MHz
Transistor count 666 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 10.56
Floating-point performance 2x 422.4 gflops
Memory bus width 256 Bit 128 Bit
Memory clock speed 850 MHz 5012 MHz
Memory bandwidth 54.4 GB/s 80 GB/s
Shared memory - -
DirectX 10.1 (10_1) 12
Shader Model 4.1 5.0
OpenGL 3.3 4.5
OpenCL N/A
Vulkan N/A
Laptop size large large
Optimus +
Display Port 1.2
Mosaic +
nView Display Management +
3D Stereo +
  Check Price Check Price