Iris Plus Graphics 645 vs UHD Graphics 620
Aggregate performance score
We've compared UHD Graphics 620 and Iris Plus Graphics 645, covering specs and all relevant benchmarks.
Iris Plus Graphics 645 outperforms UHD Graphics 620 by an impressive 67% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 805 | 661 |
| Place by popularity | 24 | not in top-100 |
| Power efficiency | 12.32 | 20.54 |
| Architecture | Generation 9.5 (2016−2020) | Generation 9.5 (2016−2020) |
| GPU code name | Kaby Lake GT2 | Coffee Lake GT3e |
| Market segment | Desktop | Desktop |
| Release date | 1 September 2017 (7 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 | 192 | 384 |
| Core clock speed | 300 MHz | 300 MHz |
| Boost clock speed | 1000 MHz | 1050 MHz |
| Number of transistors | 189 million | no data |
| Manufacturing process technology | 14 nm++ | 14 nm+++ |
| Power consumption (TDP) | 15 Watt | 15 Watt |
| Texture fill rate | 24.00 | 50.40 |
| Floating-point processing power | 0.384 TFLOPS | 0.8064 TFLOPS |
| ROPs | 3 | 6 |
| TMUs | 24 | 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 | Ring Bus | Ring Bus |
| Width | IGP | IGP |
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 | LPDDR3/DDR4 | System Shared |
| Maximum RAM amount | 32 GB | 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 | Portable Device Dependent |
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 | 1.3 |
Synthetic benchmark performance
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. 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.
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.
3DMark 11 Performance GPU
3DMark 11 is an obsolete DirectX 11 benchmark by Futuremark. It used four tests based on two scenes, one being few submarines exploring the submerged wreck of a sunken ship, the other is an abandoned temple deep in the jungle. All the tests are heavy with volumetric lighting and tessellation, and despite being done in 1280x720 resolution, are relatively taxing. Discontinued in January 2020, 3DMark 11 is now superseded by Time Spy.
3DMark Fire Strike Graphics
Fire Strike is a DirectX 11 benchmark for gaming PCs. It features two separate tests displaying a fight between a humanoid and a fiery creature made of lava. Using 1920x1080 resolution, Fire Strike shows off some realistic graphics and is quite taxing on hardware.
3DMark Time Spy Graphics
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 | 13
−92.3%
| 25
+92.3%
|
| 1440p | 13
−61.5%
| 21−24
+61.5%
|
| 4K | 8
−50%
| 12−14
+50%
|
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 6
−16.7%
|
7−8
+16.7%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 8
−37.5%
|
10−12
+37.5%
|
| Assassin's Creed Valhalla | 0−1 | 3−4 |
| Battlefield 5 | 8
−12.5%
|
9−10
+12.5%
|
| Call of Duty: Modern Warfare | 6
−50%
|
9−10
+50%
|
| Cyberpunk 2077 | 5−6
−40%
|
7−8
+40%
|
| Far Cry 5 | 5−6
−60%
|
8−9
+60%
|
| Far Cry New Dawn | 10
−10%
|
10−12
+10%
|
| Forza Horizon 4 | 38
+58.3%
|
24−27
−58.3%
|
| Hitman 3 | 7−8
−28.6%
|
9−10
+28.6%
|
| Horizon Zero Dawn | 40
+48.1%
|
27−30
−48.1%
|
| Metro Exodus | 2−3
−300%
|
8−9
+300%
|
| Red Dead Redemption 2 | 9
−11.1%
|
10−11
+11.1%
|
| Shadow of the Tomb Raider | 15
+0%
|
14−16
+0%
|
| Watch Dogs: Legion | 30
−43.3%
|
40−45
+43.3%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 9−10
−22.2%
|
10−12
+22.2%
|
| Assassin's Creed Valhalla | 0−1 | 3−4 |
| Battlefield 5 | 4−5
−125%
|
9−10
+125%
|
| Call of Duty: Modern Warfare | 7−8
−28.6%
|
9−10
+28.6%
|
| Cyberpunk 2077 | 5−6
−40%
|
7−8
+40%
|
| Far Cry 5 | 5−6
−60%
|
8−9
+60%
|
| Far Cry New Dawn | 7−8
−57.1%
|
10−12
+57.1%
|
| Forza Horizon 4 | 36
+50%
|
24−27
−50%
|
| Hitman 3 | 7−8
−28.6%
|
9−10
+28.6%
|
| Horizon Zero Dawn | 34
+25.9%
|
27−30
−25.9%
|
| Metro Exodus | 2−3
−300%
|
8−9
+300%
|
| Red Dead Redemption 2 | 6−7
−66.7%
|
10−11
+66.7%
|
| Shadow of the Tomb Raider | 11
−36.4%
|
14−16
+36.4%
|
| The Witcher 3: Wild Hunt | 14
−14.3%
|
16−18
+14.3%
|
| Watch Dogs: Legion | 35−40
−13.2%
|
40−45
+13.2%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 9−10
−22.2%
|
10−12
+22.2%
|
| Assassin's Creed Valhalla | 0−1 | 3−4 |
| Call of Duty: Modern Warfare | 7−8
−28.6%
|
9−10
+28.6%
|
| Cyberpunk 2077 | 5−6
−40%
|
7−8
+40%
|
| Far Cry 5 | 5−6
−60%
|
8−9
+60%
|
| Forza Horizon 4 | 12−14
−84.6%
|
24−27
+84.6%
|
| Hitman 3 | 7−8
−28.6%
|
9−10
+28.6%
|
| Horizon Zero Dawn | 5
−440%
|
27−30
+440%
|
| Shadow of the Tomb Raider | 14
−7.1%
|
14−16
+7.1%
|
| The Witcher 3: Wild Hunt | 3
−433%
|
16−18
+433%
|
| Watch Dogs: Legion | 35−40
−13.2%
|
40−45
+13.2%
|
Full HD
Epic Preset
| Red Dead Redemption 2 | 6−7
−66.7%
|
10−11
+66.7%
|
1440p
High Preset
| Battlefield 5 | 4−5
−75%
|
7−8
+75%
|
| Far Cry New Dawn | 4−5
−50%
|
6−7
+50%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 2−3
−100%
|
4−5
+100%
|
| Call of Duty: Modern Warfare | 2−3
−50%
|
3−4
+50%
|
| Cyberpunk 2077 | 1−2
−100%
|
2−3
+100%
|
| Far Cry 5 | 3−4
−66.7%
|
5−6
+66.7%
|
| Hitman 3 | 8−9
+0%
|
8−9
+0%
|
| Horizon Zero Dawn | 7−8
−28.6%
|
9−10
+28.6%
|
| The Witcher 3: Wild Hunt | 2−3
−50%
|
3−4
+50%
|
| Watch Dogs: Legion | 16−18
−56.3%
|
24−27
+56.3%
|
1440p
Epic Preset
| Red Dead Redemption 2 | 6−7
−33.3%
|
8−9
+33.3%
|
4K
High Preset
| Battlefield 5 | 1−2
−100%
|
2−3
+100%
|
| Far Cry New Dawn | 1−2
−100%
|
2−3
+100%
|
4K
Ultra Preset
| Assassin's Creed Odyssey | 2−3
−50%
|
3−4
+50%
|
| Assassin's Creed Valhalla | 1−2
−100%
|
2−3
+100%
|
| Call of Duty: Modern Warfare | 1−2
+0%
|
1−2
+0%
|
| Far Cry 5 | 1−2
−100%
|
2−3
+100%
|
| Watch Dogs: Legion | 0−1 | 1−2 |
4K
Epic Preset
| Red Dead Redemption 2 | 4−5
−25%
|
5−6
+25%
|
1440p
Ultra Preset
| Forza Horizon 4 | 4−5
+0%
|
4−5
+0%
|
4K
High Preset
| Hitman 3 | 0−1 | 0−1 |
| Metro Exodus | 0−1 | 0−1 |
4K
Ultra Preset
| Cyberpunk 2077 | 0−1 | 0−1 |
| Forza Horizon 4 | 2−3
+0%
|
2−3
+0%
|
This is how UHD Graphics 620 and Iris Plus Graphics 645 compete in popular games:
- Iris Plus Graphics 645 is 92% faster in 1080p
- Iris Plus Graphics 645 is 62% faster in 1440p
- Iris Plus Graphics 645 is 50% faster in 4K
Here's the range of performance differences observed across popular games:
- in Forza Horizon 4, with 1080p resolution and the Medium Preset, the UHD Graphics 620 is 58% faster.
- in Horizon Zero Dawn, with 1080p resolution and the Ultra Preset, the Iris Plus Graphics 645 is 440% faster.
All in all, in popular games:
- UHD Graphics 620 is ahead in 4 tests (7%)
- Iris Plus Graphics 645 is ahead in 50 tests (85%)
- there's a draw in 5 tests (8%)
Pros & cons summary
| Performance score | 2.67 | 4.45 |
| Recency | 1 September 2017 | 7 October 2019 |
Iris Plus Graphics 645 has a 66.7% higher aggregate performance score, and an age advantage of 2 years.
The Iris Plus Graphics 645 is our recommended choice as it beats the UHD Graphics 620 in performance tests.
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.
