Iris Plus Graphics 655 vs Radeon Pro 580
Aggregated performance score
Radeon Pro 580 outperforms Iris Plus Graphics 655 by a whopping 377% based on our aggregated benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 261 | 644 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.07 | 0.93 |
| Architecture | GCN 4.0 (2016−2020) | Gen. 9.5 Kaby Lake (2015−2017) |
| GPU code name | Polaris 20 | Kaby Lake GT3e |
| Market segment | Mobile workstation | Laptop |
| Release date | 5 June 2017 (6 years ago) | 1 September 2017 (6 years ago) |
| Current price | $5999 | $999 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
Pro 580 has 15% better value for money than Iris Plus Graphics 655.
Detailed specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 2304 | 48 |
| Core clock speed | 1100 MHz | 300 MHz |
| Boost clock speed | 1200 MHz | 1200 MHz |
| Number of transistors | 5,700 million | 189 million |
| Manufacturing process technology | 14 nm | 14 nm |
| Power consumption (TDP) | 150 Watt | 15 Watt |
| Texture fill rate | 172.8 | 50.40 |
| Floating-point performance | 6,175 gflops | no data |
Form factor & compatibility
Information on Radeon Pro 580 and Iris Plus Graphics 655 compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For notebook video cards it's notebook size, connection slot and bus, if the video card is inserted into a slot instead of being soldered to the notebook motherboard.
| Interface | PCIe 3.0 x16 | PCIe 3.0 x1 |
| Supplementary power connectors | None | no data |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | DDR3/DDR4 |
| Maximum RAM amount | 8 GB | System Shared |
| Memory bus width | 256 Bit | System Shared |
| Memory clock speed | 6780 MHz | System Shared |
| Memory bandwidth | 217.0 GB/s | no data |
| Shared memory | no data | + |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | No outputs | No outputs |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| Quick Sync | no data | + |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 (12_1) |
| Shader Model | 6.4 | 6.4 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 2.1 |
| Vulkan | 1.2.131 | 1.1.103 |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Radeon Pro 580 outperforms Iris Plus Graphics 655 by 377% based on our aggregated benchmark results.
Passmark
This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Benchmark coverage: 25%
Radeon Pro 580 outperforms Iris Plus Graphics 655 by 346% in Passmark.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Average FPS across all PC games
Here are the average frames per second in a large set of popular games across different resolutions:
| Full HD | 100−110
+376%
| 21
−376%
|
| 1440p | 70−75
+367%
| 15
−367%
|
| 4K | 75−80
+369%
| 16
−369%
|
Pros & cons summary
| Performance score | 20.04 | 4.20 |
| Recency | 5 June 2017 | 1 September 2017 |
| Maximum RAM amount | 8 GB | System Shared |
| Power consumption (TDP) | 150 Watt | 15 Watt |
The Radeon Pro 580 is our recommended choice as it beats the Iris Plus Graphics 655 in performance tests.
Be aware that Radeon Pro 580 is a mobile workstation card while Iris Plus Graphics 655 is a mobile workstation one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
