Radeon HD 6620G vs Iris Plus Graphics 640

Place in the ranking	696	1121
Place by popularity	not in top-100	not in top-100
Power efficiency	17.87	1.75
Architecture	Generation 9.5 (2016−2020)	TeraScale 2 (2009−2015)
GPU code name	Kaby Lake GT3e	Sumo
Market segment	Desktop	Desktop
Release date	3 January 2017 (7 years ago)	7 December 2011 (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	400
Core clock speed	300 MHz	444 MHz
Boost clock speed	1100 MHz	no data
Number of transistors	189 million	1,178 million
Manufacturing process technology	14 nm++	32 nm
Power consumption (TDP)	15 Watt	35 Watt
Texture fill rate	52.80	8.880
Floating-point processing power	0.8448 TFLOPS	0.3552 TFLOPS
ROPs	6	8
TMUs	48	20

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	IGP
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	DDR3L/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

No outputs

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	12 (12_1)	11.2 (11_0)
Shader Model	6.4	5.0
OpenGL	4.6	4.4
OpenCL	3.0	1.2
Vulkan	1.3	N/A

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 640 3.86
+339%

HD 6620G 0.88

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 640 1489
+337%

HD 6620G 341

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 640 2379
+266%

HD 6620G 650

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

21
+61.5%

−61.5%

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	10−12 +120%	5−6 −120%
Assassin's Creed Valhalla	3−4	0−1
Battlefield 5	8−9 +700%	1−2 −700%
Call of Duty: Modern Warfare	9−10 +200%	3−4 −200%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	8−9	0−1
Far Cry New Dawn	10−12 +450%	2−3 −450%
Forza Horizon 4	21−24 +360%	5−6 −360%
Hitman 3	9−10 +80%	5−6 −80%
Horizon Zero Dawn	27−30 +125%	12−14 −125%
Metro Exodus	7−8 +600%	1−2 −600%
Red Dead Redemption 2	10−11 +900%	1−2 −900%
Shadow of the Tomb Raider	14−16 +114%	7−8 −114%
Watch Dogs: Legion	40−45 +35.5%	30−35 −35.5%

Full HD
High Preset

Assassin's Creed Odyssey	10−12 +120%	5−6 −120%
Assassin's Creed Valhalla	3−4	0−1
Battlefield 5	8−9 +700%	1−2 −700%
Call of Duty: Modern Warfare	9−10 +200%	3−4 −200%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	8−9	0−1
Far Cry New Dawn	10−12 +450%	2−3 −450%
Forza Horizon 4	21−24 +360%	5−6 −360%
Hitman 3	9−10 +80%	5−6 −80%
Horizon Zero Dawn	27−30 +125%	12−14 −125%
Metro Exodus	7−8 +600%	1−2 −600%
Red Dead Redemption 2	10−11 +900%	1−2 −900%
Shadow of the Tomb Raider	14−16 +114%	7−8 −114%
The Witcher 3: Wild Hunt	16−18 +60%	10−11 −60%
Watch Dogs: Legion	40−45 +35.5%	30−35 −35.5%

Full HD
Ultra Preset

Assassin's Creed Odyssey	10−12 +120%	5−6 −120%
Assassin's Creed Valhalla	3−4	0−1
Call of Duty: Modern Warfare	9−10 +200%	3−4 −200%
Cyberpunk 2077	7−8 +133%	3−4 −133%
Far Cry 5	8−9	0−1
Forza Horizon 4	21−24 +360%	5−6 −360%
Hitman 3	9−10 +80%	5−6 −80%
Horizon Zero Dawn	27−30 +125%	12−14 −125%
Shadow of the Tomb Raider	14−16 +114%	7−8 −114%
The Witcher 3: Wild Hunt	4 −150%	10−11 +150%
Watch Dogs: Legion	40−45 +35.5%	30−35 −35.5%

Full HD
Epic Preset

Red Dead Redemption 2

10−11
+900%

1−2

−900%

1440p
High Preset

Battlefield 5	7−8	0−1
Far Cry New Dawn	6−7 +500%	1−2 −500%

1440p
Ultra Preset

Assassin's Creed Odyssey	3−4	0−1
Call of Duty: Modern Warfare	3−4	0−1
Cyberpunk 2077	2−3 +100%	1−2 −100%
Far Cry 5	4−5 +300%	1−2 −300%
Forza Horizon 4	4−5	0−1
Hitman 3	8−9 +14.3%	7−8 −14.3%
Horizon Zero Dawn	9−10 +125%	4−5 −125%
The Witcher 3: Wild Hunt	3−4	0−1
Watch Dogs: Legion	24−27 +700%	3−4 −700%

1440p
Epic Preset

Red Dead Redemption 2

7−8
+133%

3−4

−133%

4K
High Preset

Battlefield 5	2−3	0−1
Far Cry New Dawn	2−3	0−1
Metro Exodus	0−1	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	1−2	0−1
Cyberpunk 2077	0−1	0−1
Far Cry 5	2−3	0−1
Forza Horizon 4	2−3	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 640 and HD 6620G compete in popular games:

Iris Plus Graphics 640 is 62% faster in 1080p

Here's the range of performance differences observed across popular games:

in Red Dead Redemption 2, with 1080p resolution and the Medium Preset, the Iris Plus Graphics 640 is 900% faster.
in The Witcher 3: Wild Hunt, with 1080p resolution and the Ultra Preset, the HD 6620G is 150% faster.

All in all, in popular games:

Iris Plus Graphics 640 is ahead in 37 tests (97%)
HD 6620G is ahead in 1 test (3%)

Pros & cons summary

Performance score	3.86	0.88
Recency	3 January 2017	7 December 2011
Chip lithography	14 nm	32 nm
Power consumption (TDP)	15 Watt	35 Watt

Iris Plus Graphics 640 has a 338.6% higher aggregate performance score, an age advantage of 5 years, a 128.6% more advanced lithography process, and 133.3% lower power consumption.

The Iris Plus Graphics 640 is our recommended choice as it beats the Radeon HD 6620G in performance tests.

Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.