Iris Plus Graphics 645 vs ATI Radeon X1900 GT
Aggregate performance score
We've compared Radeon X1900 GT with Iris Plus Graphics 645, including specs and performance data.
Plus Graphics 645 outperforms X1900 by a whopping 1100% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1341 | 715 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 0.36 | 21.31 |
| Architecture | R500 (2005−2007) | Generation 9.5 (2016−2020) |
| GPU code name | R580 | Coffee Lake GT3e |
| Market segment | Desktop | Laptop |
| Release date | 1 May 2006 (19 years ago) | 7 October 2019 (6 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 | 575 MHz | 300 MHz |
| Boost clock speed | no data | 1050 MHz |
| Number of transistors | 384 million | no data |
| Manufacturing process technology | 90 nm | 14 nm+++ |
| Power consumption (TDP) | 75 Watt | 15 Watt |
| Texture fill rate | 6.900 | 50.40 |
| Floating-point processing power | no data | 0.8064 TFLOPS |
| ROPs | 12 | 6 |
| TMUs | 12 | 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 | PCIe 1.0 x16 | Ring Bus |
| Width | 1-slot | no data |
| Supplementary power connectors | 1x 6-pin | 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 | System Shared |
| Maximum RAM amount | 256 MB | System Shared |
| Memory bus width | 256 Bit | System Shared |
| Memory clock speed | 600 MHz | System Shared |
| Memory bandwidth | 38.4 GB/s | no data |
| Shared memory | - | + |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | 2x DVI, 1x S-Video | 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 and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 9.0c (9_3) | 12 (12_1) |
| Shader Model | 3.0 | 6.4 |
| OpenGL | 2.0 | 4.6 |
| OpenCL | N/A | 3.0 |
| Vulkan | N/A | 1.3 |
Synthetic benchmarks
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark score.
Passmark
This is the most ubiquitous GPU benchmark. 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.
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 | 2−3
−1200%
| 26
+1200%
|
FPS performance in popular games
Full HD
Low
| Counter-Strike 2 | 18−20
+0%
|
18−20
+0%
|
| Cyberpunk 2077 | 9−10
+0%
|
9−10
+0%
|
| Hogwarts Legacy | 9−10
+0%
|
9−10
+0%
|
Full HD
Medium
| Battlefield 5 | 16−18
+0%
|
16−18
+0%
|
| Counter-Strike 2 | 18−20
+0%
|
18−20
+0%
|
| Cyberpunk 2077 | 9−10
+0%
|
9−10
+0%
|
| Far Cry 5 | 12−14
+0%
|
12−14
+0%
|
| Fortnite | 24−27
+0%
|
24−27
+0%
|
| Forza Horizon 4 | 20−22
+0%
|
20−22
+0%
|
| Forza Horizon 5 | 10−12
+0%
|
10−12
+0%
|
| Hogwarts Legacy | 9−10
+0%
|
9−10
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+0%
|
16−18
+0%
|
| Valorant | 55−60
+0%
|
55−60
+0%
|
Full HD
High
| Battlefield 5 | 16−18
+0%
|
16−18
+0%
|
| Counter-Strike 2 | 18−20
+0%
|
18−20
+0%
|
| Counter-Strike: Global Offensive | 75−80
+0%
|
75−80
+0%
|
| Cyberpunk 2077 | 9−10
+0%
|
9−10
+0%
|
| Dota 2 | 29
+0%
|
29
+0%
|
| Far Cry 5 | 12−14
+0%
|
12−14
+0%
|
| Fortnite | 24−27
+0%
|
24−27
+0%
|
| Forza Horizon 4 | 20−22
+0%
|
20−22
+0%
|
| Forza Horizon 5 | 10−12
+0%
|
10−12
+0%
|
| Grand Theft Auto V | 14−16
+0%
|
14−16
+0%
|
| Hogwarts Legacy | 9−10
+0%
|
9−10
+0%
|
| Metro Exodus | 8−9
+0%
|
8−9
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+0%
|
16−18
+0%
|
| The Witcher 3: Wild Hunt | 12−14
+0%
|
12−14
+0%
|
| Valorant | 55−60
+0%
|
55−60
+0%
|
Full HD
Ultra
| Battlefield 5 | 16−18
+0%
|
16−18
+0%
|
| Cyberpunk 2077 | 9−10
+0%
|
9−10
+0%
|
| Dota 2 | 27
+0%
|
27
+0%
|
| Far Cry 5 | 12−14
+0%
|
12−14
+0%
|
| Forza Horizon 4 | 20−22
+0%
|
20−22
+0%
|
| Hogwarts Legacy | 9−10
+0%
|
9−10
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 16−18
+0%
|
16−18
+0%
|
| The Witcher 3: Wild Hunt | 12−14
+0%
|
12−14
+0%
|
| Valorant | 55−60
+0%
|
55−60
+0%
|
Full HD
Epic
| Fortnite | 24−27
+0%
|
24−27
+0%
|
1440p
High
| Counter-Strike 2 | 8−9
+0%
|
8−9
+0%
|
| Counter-Strike: Global Offensive | 30−35
+0%
|
30−35
+0%
|
| Grand Theft Auto V | 4−5
+0%
|
4−5
+0%
|
| Metro Exodus | 3−4
+0%
|
3−4
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 30−35
+0%
|
30−35
+0%
|
| Valorant | 45−50
+0%
|
45−50
+0%
|
1440p
Ultra
| Battlefield 5 | 2−3
+0%
|
2−3
+0%
|
| Cyberpunk 2077 | 3−4
+0%
|
3−4
+0%
|
| Far Cry 5 | 8−9
+0%
|
8−9
+0%
|
| Forza Horizon 4 | 10−11
+0%
|
10−11
+0%
|
| Hogwarts Legacy | 4−5
+0%
|
4−5
+0%
|
| The Witcher 3: Wild Hunt | 6−7
+0%
|
6−7
+0%
|
1440p
Epic
| Fortnite | 8−9
+0%
|
8−9
+0%
|
4K
High
| Grand Theft Auto V | 16−18
+0%
|
16−18
+0%
|
| Valorant | 21−24
+0%
|
21−24
+0%
|
4K
Ultra
| Battlefield 5 | 0−1 | 0−1 |
| Cyberpunk 2077 | 1−2
+0%
|
1−2
+0%
|
| Dota 2 | 14−16
+0%
|
14−16
+0%
|
| Far Cry 5 | 3−4
+0%
|
3−4
+0%
|
| Forza Horizon 4 | 5−6
+0%
|
5−6
+0%
|
| PLAYERUNKNOWN'S BATTLEGROUNDS | 5−6
+0%
|
5−6
+0%
|
4K
Epic
| Fortnite | 5−6
+0%
|
5−6
+0%
|
This is how ATI X1900 GT and Iris Plus Graphics 645 compete in popular games:
- Iris Plus Graphics 645 is 1200% faster in 1080p
All in all, in popular games:
- there's a draw in 59 tests (100%)
Pros & cons summary
| Performance score | 0.33 | 3.96 |
| Recency | 1 May 2006 | 7 October 2019 |
| Chip lithography | 90 nm | 14 nm |
| Power consumption (TDP) | 75 Watt | 15 Watt |
Iris Plus Graphics 645 has a 1100% higher aggregate performance score, an age advantage of 13 years, a 542.9% more advanced lithography process, and 400% lower power consumption.
The Iris Plus Graphics 645 is our recommended choice as it beats the Radeon X1900 GT in performance tests.
Be aware that Radeon X1900 GT is a desktop graphics card while Iris Plus Graphics 645 is a notebook one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
