Iris Pro Graphics P580 vs Radeon HD 6740G2

If you are going to buy a new graphics card and are choosing between Iris Pro Graphics P580 and Radeon HD 6740G2, 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 Pro Graphics P580 stacks up against Radeon HD 6740G2, check out specs charts below.

Iris Pro Graphics P580 and Radeon HD 6740G2 are Laptop Graphics Cards

Note: Iris Pro Graphics P580 and Radeon HD 6740G2 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 Pro Graphics P580 or Radeon HD 6740G2 here:

Main Specs

  Iris Pro Graphics P580 Radeon HD 6740G2
Power consumption (TDP) 15 Watt
Interface PCIe 3.0 x1
Memory type DDR3L/LPDDR3/DDR4
Maximum RAM amount 64 GB
Display Connectors No outputs
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  • Both cards are used in Laptops.
  • Iris Pro Graphics P580 is build with Gen. 9 Skylake architecture, and Radeon HD 6740G2 - with Terascale 2.
  • Iris Pro Graphics P580 is manufactured by 14 nm process technology, and Radeon HD 6740G2 - by 40 nm process technology.

Game benchmarks

high / 1080p 10−11 0−1
ultra / 1080p 6−7 0−1
QHD / 1440p 0−1 0−1
low / 720p 21−24 10−12
medium / 1080p 12−14 2−3
The average gaming FPS of Iris Pro Graphics P580 in Assassin's Creed Odyssey is 183% more, than Radeon HD 6740G2.

Full Specs

  Iris Pro Graphics P580 Radeon HD 6740G2
Architecture Gen. 9 Skylake Terascale 2
Code name Skylake GT4e
Type Laptop Laptop
Release date 1 September 2015 14 June 2011
Pipelines 72 880
Core clock speed 350 MHz
Boost Clock 1100 MHz
Transistor count 189 million
Manufacturing process technology 14 nm 40 nm
Texture fill rate 75.60
Shared memory + -
DirectX 12 (12_1) DirectX 11, Shader 5.0
Shader Model 6.4
OpenGL 4.6
OpenCL 2.1
Vulkan 1.1.97
Laptop size medium sized
Quick Sync +
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