GeForce GT 420M vs Iris Plus Graphics 655
Aggregated performance score
Iris Plus Graphics 655 outperforms GeForce GT 420M by 300% based on our aggregated benchmark results.
Primary Details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 642 | 1056 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-Effectiveness Evaluation | 0.95 | 0.03 |
| Architecture | Gen. 9.5 Kaby Lake (2015−2017) | Fermi (2010−2014) |
| GPU code name | Kaby Lake GT3e | N11P-GE |
| Market segment | Laptop | Laptop |
| Release date | 1 September 2017 (6 years ago) | 3 September 2010 (13 years ago) |
| Current price | $999 | $310 |
Cost-Effectiveness Evaluation
Performance to price ratio. The higher, the better.
Iris Plus Graphics 655 has 3067% better value for money than GT 420M.
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 | 48 | 96 |
| CUDA cores | no data | 96 |
| Core clock speed | 300 MHz | 500 MHz |
| Boost clock speed | 1200 MHz | no data |
| Number of transistors | 189 million | 585 million |
| Manufacturing process technology | 14 nm | 40 nm |
| Power consumption (TDP) | 15 Watt | 23 Watt |
| Texture fill rate | 50.40 | 6.0 billion/sec |
| Floating-point performance | no data | 192 gflops |
Form Factor & Compatibility
Information on Iris Plus Graphics 655 and GeForce GT 420M 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.
| Laptop size | no data | medium sized |
| Interface | PCIe 3.0 x1 | PCIe 2.0 x16 |
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 | DDR3/DDR4 | (G)DDR3 |
| Maximum RAM amount | System Shared | 1 GB |
| Memory bus width | System Shared | 128 Bit |
| Memory clock speed | System Shared | 800 MHz |
| Memory bandwidth | no data | 25.6 GB/s |
| 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 |
Supported GPU 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 | 12 (12_1) | 12 API |
| Shader Model | 6.4 | 5.1 |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 2.1 | 1.1 |
| Vulkan | 1.1.103 | N/A |
| CUDA | no data | + |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance 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.
Iris Plus Graphics 655 outperforms GeForce GT 420M by 300% based on our aggregated benchmark results.
Passmark
This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. 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.
Benchmark coverage: 25%
Iris Plus Graphics 655 outperforms GeForce GT 420M by 329% in Passmark.
3DMark Vantage Performance
3DMark Vantage is an outdated DirectX 10 benchmark using 1280x1024 screen resolution. It taxes the graphics card with two scenes, one depicting a girl escaping some militarized base located within a sea cave, the other displaying a space fleet attack on a defenseless planet. It was discontinued in April 2017, and Time Spy benchmark is now recommended to be used instead.
Benchmark coverage: 17%
Iris Plus Graphics 655 outperforms GeForce GT 420M by 303% in 3DMark Vantage Performance.
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.
Benchmark coverage: 17%
Iris Plus Graphics 655 outperforms GeForce GT 420M by 322% in 3DMark 11 Performance GPU.
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:
| 900p | 45−50
+275%
| 12
−275%
|
| Full HD | 21
+23.5%
| 17
−23.5%
|
| 1440p | 15
+400%
| 3−4
−400%
|
| 4K | 16
+300%
| 4−5
−300%
|
FPS performance in popular games
Full HD
Low Preset
| Cyberpunk 2077 | 7−8
+133%
|
3−4
−133%
|
Full HD
Medium Preset
| Assassin's Creed Odyssey | 7−8
+600%
|
1−2
−600%
|
| Assassin's Creed Valhalla | 3−4 | 0−1 |
| Battlefield 5 | 12−14
+300%
|
3−4
−300%
|
| Call of Duty: Modern Warfare | 14−16
+66.7%
|
9−10
−66.7%
|
| Cyberpunk 2077 | 7−8
+133%
|
3−4
−133%
|
| Far Cry 5 | 11
+450%
|
2−3
−450%
|
| Far Cry New Dawn | 11
+450%
|
2−3
−450%
|
| Forza Horizon 4 | 12−14
+333%
|
3−4
−333%
|
| Hitman 3 | 9−10
+800%
|
1−2
−800%
|
| Horizon Zero Dawn | 7−8 | 0−1 |
| Red Dead Redemption 2 | 8−9
+167%
|
3−4
−167%
|
| Shadow of the Tomb Raider | 12
+71.4%
|
7−8
−71.4%
|
| Watch Dogs: Legion | 5−6
+400%
|
1−2
−400%
|
Full HD
High Preset
| Assassin's Creed Odyssey | 7−8
+600%
|
1−2
−600%
|
| Assassin's Creed Valhalla | 3−4 | 0−1 |
| Battlefield 5 | 12−14
+300%
|
3−4
−300%
|
| Call of Duty: Modern Warfare | 14−16
+66.7%
|
9−10
−66.7%
|
| Cyberpunk 2077 | 7−8
+133%
|
3−4
−133%
|
| Far Cry 5 | 10
+400%
|
2−3
−400%
|
| Far Cry New Dawn | 10
+400%
|
2−3
−400%
|
| Forza Horizon 4 | 12−14
+333%
|
3−4
−333%
|
| Hitman 3 | 9−10
+800%
|
1−2
−800%
|
| Horizon Zero Dawn | 7−8 | 0−1 |
| Metro Exodus | 6
+500%
|
1−2
−500%
|
| Red Dead Redemption 2 | 8−9
+167%
|
3−4
−167%
|
| Shadow of the Tomb Raider | 5
−40%
|
7−8
+40%
|
| The Witcher 3: Wild Hunt | 11
+175%
|
4−5
−175%
|
| Watch Dogs: Legion | 5−6
+400%
|
1−2
−400%
|
Full HD
Ultra Preset
| Assassin's Creed Odyssey | 7−8
+600%
|
1−2
−600%
|
| Assassin's Creed Valhalla | 3−4 | 0−1 |
| Battlefield 5 | 12−14
+300%
|
3−4
−300%
|
| Cyberpunk 2077 | 7−8
+133%
|
3−4
−133%
|
| Far Cry 5 | 9
+350%
|
2−3
−350%
|
| Far Cry New Dawn | 9
+350%
|
2−3
−350%
|
| Forza Horizon 4 | 12−14
+333%
|
3−4
−333%
|
| The Witcher 3: Wild Hunt | 6
+50%
|
4−5
−50%
|
| Watch Dogs: Legion | 5−6
+400%
|
1−2
−400%
|
1440p
High Preset
| Call of Duty: Modern Warfare | 7−8
+133%
|
3−4
−133%
|
| Hitman 3 | 7−8
+133%
|
3−4
−133%
|
| Horizon Zero Dawn | 10−12
+37.5%
|
8−9
−37.5%
|
| Metro Exodus | 2−3 | 0−1 |
| Red Dead Redemption 2 | 2−3 | 0−1 |
| Shadow of the Tomb Raider | 7−8
+40%
|
5−6
−40%
|
1440p
Ultra Preset
| Assassin's Creed Odyssey | 2−3 | 0−1 |
| Cyberpunk 2077 | 2−3
+100%
|
1−2
−100%
|
| Far Cry 5 | 6−7
+200%
|
2−3
−200%
|
| Far Cry New Dawn | 2−3 | 0−1 |
| Forza Horizon 4 | 4−5
+300%
|
1−2
−300%
|
| The Witcher 3: Wild Hunt | 4−5
+300%
|
1−2
−300%
|
4K
High Preset
| Call of Duty: Modern Warfare | 3−4
+200%
|
1−2
−200%
|
| Hitman 3 | 4−5
+300%
|
1−2
−300%
|
| Horizon Zero Dawn | 8−9
+14.3%
|
7−8
−14.3%
|
| Red Dead Redemption 2 | 2−3 | 0−1 |
| Shadow of the Tomb Raider | 1−2 | 0−1 |
| The Witcher 3: Wild Hunt | 0−1 | 0−1 |
4K
Ultra Preset
| Assassin's Creed Odyssey | 2−3 | 0−1 |
| Assassin's Creed Valhalla | 1−2 | 0−1 |
| Cyberpunk 2077 | 0−1 | 0−1 |
| Far Cry 5 | 4−5
+33.3%
|
3−4
−33.3%
|
| Far Cry New Dawn | 7−8
+40%
|
5−6
−40%
|
| Forza Horizon 4 | 2−3 | 0−1 |
This is how Iris Plus Graphics 655 and GT 420M compete in popular games:
- Iris Plus Graphics 655 is 275% faster than GT 420M in 900p
- Iris Plus Graphics 655 is 23.5% faster than GT 420M in 1080p
- Iris Plus Graphics 655 is 400% faster than GT 420M in 1440p
- Iris Plus Graphics 655 is 300% faster than GT 420M in 4K
Here's the range of performance differences observed across popular games:
- in Hitman 3, with 1080p resolution and the Medium Preset, the Iris Plus Graphics 655 is 800% faster than the GT 420M.
- in Shadow of the Tomb Raider, with 1080p resolution and the High Preset, the GT 420M is 40% faster than the Iris Plus Graphics 655.
All in all, in popular games:
- Iris Plus Graphics 655 is ahead in 26 tests (96%)
- GT 420M is ahead in 1 test (4%)
Pros & Cons Summary
| Performance score | 4.20 | 1.05 |
| Recency | 1 September 2017 | 3 September 2010 |
| Maximum RAM amount | System Shared | 1 GB |
| Chip lithography | 14 nm | 40 nm |
| Power consumption (TDP) | 15 Watt | 23 Watt |
The Iris Plus Graphics 655 is our recommended choice as it beats the GeForce GT 420M 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.
