Iris Plus Graphics 655 vs Radeon R9 M390X

When choosing between Iris Plus Graphics 655 and Radeon R9 M390X, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Iris Plus Graphics 655 and Radeon R9 M390X.

Iris Plus Graphics 655 and Radeon R9 M390X are Laptop Graphics Cards

Note: Iris Plus Graphics 655 and Radeon R9 M390X 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 Radeon R9 M390X here:

Main Specs

  Iris Plus Graphics 655 Radeon R9 M390X
Power consumption (TDP) 15 Watt 100 Watt
Interface PCIe 3.0 x1 PCIe 3.0 x16
Supplementary power connectors None
Memory type DDR3/DDR4 GDDR5
Maximum RAM amount 4 GB
Display Connectors No outputs No outputs
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  • Radeon R9 M390X has 566% more power consumption, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is connected by PCIe 3.0 x1, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
  • Both cards are used in Laptops.
  • Iris Plus Graphics 655 is build with Gen. 9.5 Kaby Lake architecture, and Radeon R9 M390X - with GCN 3.
  • Core clock speed of Radeon R9 M390X is 423 MHz higher, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is manufactured by 14 nm process technology, and Radeon R9 M390X - by 28 nm process technology.

Game benchmarks

high / 1080p 12−14 21−24
ultra / 1080p 7−8 12−14
QHD / 1440p 2−3 8−9
4K / 2160p 5−6
low / 720p 27−30 40−45
medium / 1080p 16−18 27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 76% more, than Iris Plus Graphics 655.

Full Specs

  Iris Plus Graphics 655 Radeon R9 M390X
Architecture Gen. 9.5 Kaby Lake GCN 3
Code name Kaby Lake GT3e Amethyst (XT) / Tonga
Type Laptop Laptop
Release date 1 September 2017 9 June 2015
Pipelines 48 2048
Core clock speed 300 MHz 723 MHz
Boost Clock 1200 MHz
Transistor count 189 million 5,000 million
Manufacturing process technology 14 nm 28 nm
Texture fill rate 50.40 92.54
Floating-point performance 2,961 gflops
Memory bus width 256 Bit
Memory bandwidth 160.0 GB/s
Shared memory + -
DirectX 12 (12_1)
Shader Model 6.4 6.3
OpenGL 4.6 4.4
OpenCL 2.1 Not Listed
Vulkan 1.1.103 +
FreeSync +
Bus support PCIe 3.0
Laptop size large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
Quick Sync +
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