GeForce GT 620M vs Iris Plus Graphics 655

Place in the ranking	658	1075
Place by popularity	not in top-100	not in top-100
Power efficiency	20.69	5.21
Architecture	Generation 9.5 (2016−2020)	Fermi (2010−2014)
GPU code name	Coffee Lake GT3e	GF108
Market segment	Desktop	Laptop
Release date	3 April 2018 (6 years ago)	23 August 2012 (12 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	96
Core clock speed	300 MHz	Up to 625 MHz
Boost clock speed	1050 MHz	715 MHz
Number of transistors	189 million	585 million
Manufacturing process technology	14 nm+++	40 nm
Power consumption (TDP)	15 Watt	15 Watt
Texture fill rate	50.40	10.56
Floating-point processing power	0.8064 TFLOPS	0.2534 TFLOPS
ROPs	6	4
TMUs	48	16

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).

Laptop size	no data	medium sized
Bus support	no data	PCI Express 2.0
Interface	Ring Bus	PCIe 2.0 x16
Width	IGP	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	System Shared	DDR3
Maximum RAM amount	System Shared	1 GB
Memory bus width	System Shared	Up to 128bit
Memory clock speed	System Shared	900 MHz
Memory bandwidth	no data	Up to 28.8 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	Portable Device Dependent	No outputs
HDMI	-	+
HDCP	-	+
Maximum VGA resolution	no data	Up to 2048x1536

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

3D Blu-Ray	-	+
Optimus	-	+
Quick Sync	+	no data

API compatibility

List of supported 3D 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	3.0	1.1
Vulkan	1.3	N/A
CUDA	-	+

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.

Iris Plus Graphics 655 4.49
+297%

GT 620M 1.13

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.

Iris Plus Graphics 655 1733
+298%

GT 620M 435

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.

Iris Plus Graphics 655 2894
+210%

GT 620M 934

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.

Iris Plus Graphics 655 12287
+191%

GT 620M 4219

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.

Iris Plus Graphics 655 1983
+169%

GT 620M 738

3DMark Cloud Gate GPU

Cloud Gate is an outdated DirectX 11 feature level 10 benchmark that was used for home PCs and basic notebooks. It displays a few scenes of some weird space teleportation device launching spaceships into unknown, using fixed resolution of 1280x720. Just like Ice Storm benchmark, it has been discontinued in January 2020 and replaced by 3DMark Night Raid.

Iris Plus Graphics 655 14343
+172%

GT 620M 5269

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	19 −94.7%	37 +94.7%
1440p	12 +300%	3−4 −300%
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	12−14 +140%	5−6 −140%
Assassin's Creed Valhalla	4−5 +300%	1−2 −300%
Battlefield 5	10−11 +400%	2−3 −400%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	9−10 +800%	1−2 −800%
Far Cry New Dawn	12−14 +500%	2−3 −500%
Forza Horizon 4	46 +4500%	1−2 −4500%
Hitman 3	10−11 +100%	5−6 −100%
Horizon Zero Dawn	27−30 +115%	12−14 −115%
Metro Exodus	9−10 +350%	2−3 −350%
Red Dead Redemption 2	10−12 +1000%	1−2 −1000%
Shadow of the Tomb Raider	23 +229%	7−8 −229%
Watch Dogs: Legion	40−45 +37.5%	30−35 −37.5%

Full HD
High Preset

Assassin's Creed Odyssey	12−14 +140%	5−6 −140%
Assassin's Creed Valhalla	4−5 +300%	1−2 −300%
Battlefield 5	10−11 +400%	2−3 −400%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	9−10 +800%	1−2 −800%
Far Cry New Dawn	12−14 +500%	2−3 −500%
Forza Horizon 4	40 +3900%	1−2 −3900%
Hitman 3	10−11 +100%	5−6 −100%
Horizon Zero Dawn	27−30 +115%	12−14 −115%
Metro Exodus	9−10 +350%	2−3 −350%
Red Dead Redemption 2	10−12 +1000%	1−2 −1000%
Shadow of the Tomb Raider	17 +143%	7−8 −143%
The Witcher 3: Wild Hunt	16−18 +45.5%	10−12 −45.5%
Watch Dogs: Legion	40−45 +37.5%	30−35 −37.5%

Full HD
Ultra Preset

Assassin's Creed Odyssey	12−14 +140%	5−6 −140%
Assassin's Creed Valhalla	4−5 +300%	1−2 −300%
Call of Duty: Modern Warfare	9−10 +125%	4−5 −125%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	9−10 +800%	1−2 −800%
Forza Horizon 4	24−27 +2500%	1−2 −2500%
Hitman 3	10−11 +100%	5−6 −100%
Horizon Zero Dawn	10 −30%	12−14 +30%
Shadow of the Tomb Raider	15 +114%	7−8 −114%
The Witcher 3: Wild Hunt	6 −83.3%	10−12 +83.3%
Watch Dogs: Legion	40−45 +37.5%	30−35 −37.5%

Full HD
Epic Preset

Red Dead Redemption 2

10−12
+1000%

1−2

−1000%

1440p
High Preset

Battlefield 5	8−9 +700%	1−2 −700%
Far Cry New Dawn	6−7 +200%	2−3 −200%

1440p
Ultra Preset

Assassin's Creed Odyssey	4−5 +300%	1−2 −300%
Call of Duty: Modern Warfare	3−4	0−1
Cyberpunk 2077	2−3 +100%	1−2 −100%
Far Cry 5	5−6 +400%	1−2 −400%
Forza Horizon 4	6−7 +500%	1−2 −500%
Hitman 3	9−10 +28.6%	7−8 −28.6%
Horizon Zero Dawn	10−11 +150%	4−5 −150%
Metro Exodus	0−1	0−1
The Witcher 3: Wild Hunt	3−4	0−1
Watch Dogs: Legion	24−27 +420%	5−6 −420%

1440p
Epic Preset

Red Dead Redemption 2

8−9
+100%

4−5

−100%

4K
High Preset

Battlefield 5	3−4	0−1
Far Cry New Dawn	3−4	0−1
Hitman 3	0−1	0−1
Horizon Zero Dawn	1−2	0−1
Metro Exodus	1−2	0−1

4K
Ultra Preset

Assassin's Creed Odyssey	3−4 +200%	1−2 −200%
Assassin's Creed Valhalla	2−3	0−1
Call of Duty: Modern Warfare	2−3	0−1
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3	0−1
Forza Horizon 4	3−4	0−1
Watch Dogs: Legion	1−2	0−1

4K
Epic Preset

Red Dead Redemption 2

5−6
+150%

2−3

−150%

This is how Iris Plus Graphics 655 and GT 620M compete in popular games:

GT 620M is 95% faster in 1080p
Iris Plus Graphics 655 is 300% faster in 1440p
Iris Plus Graphics 655 is 300% 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 Iris Plus Graphics 655 is 4500% faster.
in The Witcher 3: Wild Hunt, with 1080p resolution and the Ultra Preset, the GT 620M is 83% faster.

All in all, in popular games: