Iris Xe Graphics G4 vs Iris Plus Graphics 645
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 663 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | Generation 9.5 (2016−2020) | Generation 12.1 (2020−2021) |
| GPU code name | Coffee Lake GT3e | Tiger Lake GT2 |
| Market segment | Laptop | Laptop |
| Release date | 7 October 2019 (4 years ago) | 2 September 2020 (4 years ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 384 | 384 |
| Core clock speed | 300 MHz | 300 MHz |
| Boost clock speed | 1050 MHz | 1100 MHz |
| Manufacturing process technology | 14 nm+++ | 10 nm |
| Power consumption (TDP) | 15 Watt | 15 Watt |
| Texture fill rate | 50.40 | 26.40 |
| Floating-point processing power | 0.8064 TFLOPS | 0.8448 TFLOPS |
| ROPs | 6 | 12 |
| TMUs | 48 | 24 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | Ring Bus | PCIe 3.0 x1 |
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 | System Shared | System Shared |
| Maximum RAM amount | System Shared | System Shared |
| Memory bus width | System Shared | System Shared |
| Memory clock speed | System Shared | System Shared |
| 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 | Portable Device Dependent | No outputs |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| Quick Sync | + | + |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_1) | 12 (12_1) |
| Shader Model | 6.4 | 6.4 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | 1.3 | 1.2 |
Pros & cons summary
| Recency | 7 October 2019 | 2 September 2020 |
| Chip lithography | 14 nm | 10 nm |
Iris Xe Graphics G4 has an age advantage of 10 months, and a 40% more advanced lithography process.
We couldn't decide between Iris Plus Graphics 645 and Iris Xe Graphics G4. We've got no test results to judge.
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.
