Iris Plus Graphics 655 vs Radeon HD 5870

If you are going to buy a new graphics card and are choosing between Iris Plus Graphics 655 and Radeon HD 5870, 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 Radeon HD 5870, check out specs charts below.

Iris Plus Graphics 655 is a Laptop Graphics Card

Note: Iris Plus Graphics 655 is only used in laptop graphics. It has 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 here:

Main Specs

  Iris Plus Graphics 655 Radeon HD 5870
Power consumption (TDP) 15 Watt 188 Watt
Interface PCIe 3.0 x1 PCIe 2.0 x16
Supplementary power connectors 2x 6-pin
Memory type DDR3/DDR4 GDDR5
Maximum RAM amount 1 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 5870 has 1153% more power consumption, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is connected by PCIe 3.0 x1, and Radeon HD 5870 uses PCIe 2.0 x16 interface.
  • Iris Plus Graphics 655 is used in Laptops, and Radeon HD 5870 - in Desktops.
  • Iris Plus Graphics 655 is build with Gen. 9.5 Kaby Lake architecture, and Radeon HD 5870 - with TeraScale 2.
  • Core clock speed of Radeon HD 5870 is 550 MHz higher, than Iris Plus Graphics 655.
  • Iris Plus Graphics 655 is manufactured by 14 nm process technology, and Radeon HD 5870 - by 40 nm process technology.

Game benchmarks

high / 1080p 12−14 10−12
ultra / 1080p 7−8 6−7
QHD / 1440p 2−3 1−2
low / 720p 27−30 24−27
medium / 1080p 16−18 14−16
The average gaming FPS of Iris Plus Graphics 655 in Assassin's Creed Odyssey is 18% more, than Radeon HD 5870.

Full Specs

  Iris Plus Graphics 655 Radeon HD 5870
Architecture Gen. 9.5 Kaby Lake TeraScale 2
Code name Kaby Lake GT3e Cypress
Type Laptop Desktop
Release date 1 September 2017 23 September 2009
Pipelines 48 1600
Core clock speed 300 MHz 850 MHz
Boost Clock 1200 MHz
Transistor count 189 million 2,154 million
Manufacturing process technology 14 nm 40 nm
Texture fill rate 50.40 68.00
Floating-point performance 2,720.0 gflops
Length 282 mm
Memory bus width 256 Bit
Memory clock speed 4800 MHz
Memory bandwidth 153.6 GB/s
Shared memory +
DirectX 12 (12_1) 11.2 (11_0)
Shader Model 6.4 5.0
OpenGL 4.6 4.4
OpenCL 2.1 1.2
Vulkan 1.1.103 N/A
Quick Sync +
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