Iris Plus Graphics 645 vs Quadro M620

When comparing Iris Plus Graphics 645 and Quadro M620, 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 Iris Plus Graphics 645 and Quadro M620 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Iris Plus Graphics 645 and Quadro M620 are Laptop Graphics Cards

Note: Iris Plus Graphics 645 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 645 or Quadro M620 here:

Main Specs

  Iris Plus Graphics 645 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 645.
  • Iris Plus Graphics 645 is used in Laptops, and Quadro M620 - in Mobile workstations.
  • Iris Plus Graphics 645 is build with Gen. 9.5 Coffee Lake architecture, and Quadro M620 - with Maxwell.
  • Core clock speed of Quadro M620 is 718 MHz higher, than Iris Plus Graphics 645.
  • Iris Plus Graphics 645 is manufactured by 14 nm process technology, and Quadro M620 - by 28 nm process technology.

Game benchmarks

high / 1080p 4−5 14−16
ultra / 1080p 2−3 8−9
QHD / 1440p 0−1 3−4
low / 720p 12−14 30−35
medium / 1080p 5−6 18−20
The average gaming FPS of Quadro M620 in Assassin's Creed Odyssey is 200% more, than Iris Plus Graphics 645.

Full Specs

  Iris Plus Graphics 645 Quadro M620
Architecture Gen. 9.5 Coffee Lake Maxwell
Code name Kaby Lake GT3e
Type Laptop Mobile workstation
Release date 10 July 2019 13 January 2017
Pipelines 48 512
Core clock speed 300 MHz 1018 MHz
Boost Clock 1150 MHz
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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