Iris Plus Graphics 645 vs Riva TNT2 PRO
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 663 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 20.68 |
| Architecture | Fahrenheit (1998−2000) | Generation 9.5 (2016−2020) |
| GPU code name | NV5 B6 | Coffee Lake GT3e |
| Market segment | Desktop | Laptop |
| Release date | 12 October 1999 (25 years ago) | 7 October 2019 (5 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 | no data | 384 |
| Core clock speed | 143 MHz | 300 MHz |
| Boost clock speed | no data | 1050 MHz |
| Number of transistors | 15 million | no data |
| Manufacturing process technology | 250 nm | 14 nm+++ |
| Power consumption (TDP) | no data | 15 Watt |
| Texture fill rate | 0.29 | 50.40 |
| Floating-point processing power | no data | 0.8064 TFLOPS |
| ROPs | 2 | 6 |
| TMUs | 2 | 48 |
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 | AGP 4x | Ring Bus |
| Width | 1-slot | no data |
| 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 | SDR | System Shared |
| Maximum RAM amount | 32 MB | System Shared |
| Memory bus width | 128 Bit | System Shared |
| Memory clock speed | 167 MHz | System Shared |
| Memory bandwidth | 2.672 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 | 1x VGA | Portable Device Dependent |
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 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 6.0 | 12 (12_1) |
| Shader Model | no data | 6.4 |
| OpenGL | 1.2 | 4.6 |
| OpenCL | N/A | 3.0 |
| Vulkan | N/A | 1.3 |
Pros & cons summary
| Recency | 12 October 1999 | 7 October 2019 |
| Chip lithography | 250 nm | 14 nm |
Iris Plus Graphics 645 has an age advantage of 19 years, and a 1685.7% more advanced lithography process.
We couldn't decide between Riva TNT2 PRO and Iris Plus Graphics 645. We've got no test results to judge.
Be aware that Riva TNT2 PRO is a desktop card while Iris Plus Graphics 645 is a notebook 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
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