Iris Plus Graphics 645 vs FirePro M3900
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | not rated | 656 |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | Terascale 2 (2009−2015) | Gen. 9.5 Coffee Lake (2019) |
| GPU code name | Seymour XT | Kaby Lake GT3e |
| Market segment | Mobile workstation | Laptop |
| Release date | 13 April 2011 (13 years ago) | 10 July 2019 (4 years ago) |
| Current price | $42 | no data |
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 | 160 | 48 |
| Core clock speed | 700 MHz | 300 MHz |
| Boost clock speed | 750 MHz | 1150 MHz |
| Number of transistors | 370 million | no data |
| Manufacturing process technology | 40 nm | 14 nm |
| Power consumption (TDP) | 20 Watt | 15 Watt |
| Texture fill rate | 6.000 | 50.40 |
| Floating-point performance | 240 gflops | no data |
Form factor & compatibility
Information on FirePro M3900 and Iris Plus Graphics 645 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.
| Bus support | n/a | no data |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x1 |
| Form factor | chip-down | 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 | GDDR3 | DDR3, DDR4 |
| Maximum RAM amount | 1 GB | System Shared |
| Memory bus width | 64 Bit | System Shared |
| Memory clock speed | 900 MHz | System Shared |
| Memory bandwidth | 14 GB/s | no data |
| Shared memory | - | + |
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 |
| Eyefinity | + | no data |
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 | 11.2 (11_0) | 12 (12_1) |
| Shader Model | 5.0 | 6.4 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.1 |
| Vulkan | N/A | 1.1.103 |
Pros & cons summary
| Recency | 13 April 2011 | 10 July 2019 |
| Chip lithography | 40 nm | 14 nm |
| Power consumption (TDP) | 20 Watt | 15 Watt |
We couldn't decide between FirePro M3900 and Iris Plus Graphics 645. We've got no test results to judge.
Be aware that FirePro M3900 is a mobile workstation card while Iris Plus Graphics 645 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.
