Iris Plus Graphics 655 vs Quadro M620

If you are going to buy a new graphics card and are choosing between Iris Plus Graphics 655 and Quadro M620, 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 Iris Plus Graphics 655 stacks up against Quadro M620, check out specs charts below.

Iris Plus Graphics 655 and Quadro M620 are Laptop Graphics Cards

Note: Iris Plus Graphics 655 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 Iris Plus Graphics 655 or Quadro M620 here:

Main Specs

  Iris Plus Graphics 655 Quadro M620
Power consumption (TDP) 15 Watt 30 Watt
Interface PCIe 3.0 x1
Memory type DDR3/DDR4 GDDR5
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • Quadro M620 has 100% more power consumption, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is used in Laptops, and Quadro M620 - in Mobile workstations.
  • Iris Plus Graphics 655 is build with Gen. 9.5 Kaby Lake architecture, and Quadro M620 - with Maxwell.
  • Core clock speed of Quadro M620 is 718 MHz higher, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is manufactured by 14 nm process technology, and Quadro M620 - by 28 nm process technology.

Game benchmarks

high / 1080p 12−14 14−16
ultra / 1080p 7−8 8−9
QHD / 1440p 2−3 3−4
low / 720p 27−30 30−35
medium / 1080p 16−18 18−20
The average gaming FPS of Quadro M620 in Assassin's Creed Odyssey is 15% more, than Iris Plus Graphics 655.

Full Specs

  Iris Plus Graphics 655 Quadro M620
Architecture Gen. 9.5 Kaby Lake Maxwell
Code name Kaby Lake GT3e
Type Laptop Mobile workstation
Release date 1 September 2017 13 January 2017
Pipelines 48 512
Core clock speed 300 MHz 1018 MHz
Boost Clock 1200 MHz
Transistor count 189 million
Manufacturing process technology 14 nm 28 nm
Texture fill rate 50.40
Memory bus width 128 Bit
Memory clock speed 5012 MHz
Memory bandwidth 80 GB/s
Shared memory + -
DirectX 12 (12_1) 12
Shader Model 6.4 5.0
OpenGL 4.6 4.5
OpenCL 2.1
Vulkan 1.1.103
Laptop size large
Optimus +
Quick Sync +
Display Port 1.2
Mosaic +
nView Display Management +
3D Stereo +
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