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AMD Radeon HD 6680G2 vs AMD Radeon HD 6740G2 vs AMD Radeon HD 6775G2

AMD Radeon HD 6680G2

► remove from comparison AMD Radeon HD 6680G2

The AMD Radeon HD 6680G2 is the combination of a integrated AMD Radeon HD 6520G APU processor graphics card and a dedicated entry level AMD Radeon HD 6630M graphics card in CrossFire combination. It is called AMD Dual Graphics or asymmetric CrossFire and uses AFR (Alternate Frame Rendering) to render different frames on the two graphic cores. Therefore the combination also suffers from micro stuttering (different spaces between two images lead to stuttering altough the framerate is high enough for fluent gaming with only one GPU).

The performance of the Radeon HD 6680G2 depends greatly on the driver support for the used games. In some games the performance may even degrade by 10-15% compared to using only the APU graphics card. Currently (June 2011) only DirectX 10 and 11 graphics modes are supported and therefore lower settings and older games are not accelerated. Due to the micro stuttering and performance problems, Dual Graphics may impose more problems than bring performance gains.

The features like PureVideo HD (UVD3) or OpenCL support are similar to the two graphics cards.

As both graphics cards are rendering frames, the power consumption is clearly higher than using only one GPU.

AMD Radeon HD 6740G2

► remove from comparison AMD Radeon HD 6740G2

The AMD Radeon HD 6740G2 is the combination of a integrated AMD Radeon HD 6620G APU processor graphics card and a dedicated entry level AMD Radeon HD 6650M graphics card in CrossFire combination. It is called AMD Dual Graphics or asymmetric CrossFire and uses AFR (Alternate Frame Rendering) to render different frames on the two graphic cores. Therefore the combination also suffers from micro stuttering (different spaces between two images lead to stuttering altough the framerate is high enough for fluent gaming with only one GPU).

The performance of the Radeon HD 6740G2 depends greatly on the driver support for the used games. In some games the performance may even degrade by 10-15% compared to using only the APU graphics card. Currently (June 2011) only DirectX 10 and 11 graphics modes are supported and therefore lower settings and older games are not accelerated. Due to the micro stuttering and performance problems, Dual Graphics may impose more problems than bring performance gains.

The features like PureVideo HD (UVD3) or OpenCL support are similar to the two graphics cards.

As both graphics cards are rendering frames, the power consumption is clearly higher than using only one GPU.

AMD Radeon HD 6775G2

► remove from comparison AMD Radeon HD 6775G2

The AMD Radeon HD 6775G2 is the combination of a integrated AMD Radeon HD 6620G or 6520G APU processor graphics card and a dedicated entry level AMD Radeon HD 6770M graphics card in CrossFire combination. The laptop must be equipped with dual channel RAM for CrossFire to work.

This particular graphics solution is called AMD Dual Graphics or asymmetric CrossFire and uses AFR (Alternate Frame Rendering) to render different frames on the two graphic cores. As a result, the combination suffers from micro stuttering, a phenomenon where frame rates may appear consistently high but with noticeable stutters.

The performance of the Radeon HD 6775G2 depends greatly on driver support from games. In some games, the performance may even degrade by 10-15% compared to using only the APU graphics card. As of June 2011, only DirectX 10 and 11 graphics modes are supported while lower settings and older games cannot be accelerated. Due to micro stuttering and performance problems, AMD Dual Graphics may impose more graphical problems than gains.

Features like PureVideo HD (UVD3) and OpenCL support are available on the Radeon HD 6775G2 for accelerated video encoding.

As both graphics cards are rendering frames, the power consumption is clearly higher than just one active GPU.

AMD Radeon HD 6680G2AMD Radeon HD 6740G2AMD Radeon HD 6775G2
Radeon HD 6000G2 Series
Radeon HD 6775G2 880
Radeon HD 6755G2 880
Radeon HD 6760G2 880
Radeon HD 6740G2 880
Radeon HD 6720G2 880
Radeon HD 6690G2 880
Radeon HD 6680G2 800
Radeon HD 6645G2 560
Radeon HD 6640G2 560
Radeon HD 6545G2 480
Radeon HD 6540G2 480
Radeon HD 6515G2 400
Radeon HD 6510G2 400
Radeon HD 6775G2 880
Radeon HD 6755G2 880
Radeon HD 6760G2 880
Radeon HD 6740G2 880
Radeon HD 6720G2 880
Radeon HD 6690G2 880
Radeon HD 6680G2 800
Radeon HD 6645G2 560
Radeon HD 6640G2 560
Radeon HD 6545G2 480
Radeon HD 6540G2 480
Radeon HD 6515G2 400
Radeon HD 6510G2 400
Radeon HD 6775G2 880
Radeon HD 6755G2 880
Radeon HD 6760G2 880
Radeon HD 6740G2 880
Radeon HD 6720G2 880
Radeon HD 6690G2 880
Radeon HD 6680G2 800
Radeon HD 6645G2 560
Radeon HD 6640G2 560
Radeon HD 6545G2 480
Radeon HD 6540G2 480
Radeon HD 6515G2 400
Radeon HD 6510G2 400
ArchitectureTerascale 2Terascale 2Terascale 2
Pipelines800 - unified880 - unified880 - unified
Shared Memorynonono
APIDirectX 11, Shader 5.0DirectX 11, Shader 5.0DirectX 11, Shader 5.0
technology40 nm40 nm40 nm
Notebook Sizemedium sizedmedium sizedmedium sized
Date of Announcement14.06.2011 14.06.2011 14.06.2011

Benchmarks

3DMark 11 - 3DM11 Performance Score
1105 Points (2%)
min: 1419     avg: 1602     median: 1624 (2%)     max: 1739 Points
3DMark 11 - 3DM11 Performance GPU
1061 Points (1%)
min: 1472     avg: 1577     median: 1597 (1%)     max: 1661 Points
3DMark Vantage
3DM Vant. Perf. total + AMD Radeon HD 6680G2
3DMark Vantage - 3DM Vant. Perf. total
3224 Points (1%)
3DM Vant. Perf. total + AMD Radeon HD 6740G2
min: 4937     avg: 5088     median: 5088 (1%)     max: 5239 Points
3DM Vant. Perf. GPU no PhysX + AMD Radeon HD 6680G2
3DMark Vantage - 3DM Vant. Perf. GPU no PhysX
2800 Points (2%)
3DM Vant. Perf. GPU no PhysX + AMD Radeon HD 6740G2
min: 4790     avg: 4956     median: 4956 (3%)     max: 5122 Points
3DMark 03 - 3DMark 03 - Standard
min: 14350     avg: 17227     median: 17227 (9%)     max: 20104 Points
3DMark 05 - 3DMark 05 - Standard
10949 Points (12%)
3DMark 06 3DMark 06 - Standard 1280x1024 + AMD Radeon HD 6680G2
3DMark 06
4795 Points (6%)
3DMark 06 - Standard 1280x1024 + AMD Radeon HD 6740G2
min: 6412     avg: 6754     median: 6753.5 (9%)     max: 7095 Points
Unigine Heaven 2.1 - Heaven 2.1 high
10.8 fps (2%)
min: 17.5     avg: 17.7     median: 17.7 (3%)     max: 17.8 fps
Windows 7 Experience Index - Win7 Gaming graphics
6.5 Points (82%)
min: 6.1     avg: 6.2     median: 6.2 (78%)     max: 6.3 Points
Windows 7 Experience Index - Win7 Graphics
5.9 Points (75%)
min: 5.2     avg: 5.3     median: 5.3 (67%)     max: 5.3 Points
Cinebench R10 Cinebench R10 Shading (32bit) + AMD Radeon HD 6680G2
Cinebench R10 - Cinebench R10 Shading (32bit)
3884 Points (3%)
Cinebench R10 Shading (32bit) + AMD Radeon HD 6740G2
min: 3628     avg: 3792     median: 3792 (3%)     max: 3956 Points
Cinebench R11.5 Cinebench R11.5 OpenGL 64 Bit + AMD Radeon HD 6680G2
Cinebench R11.5 - Cinebench R11.5 OpenGL 64 Bit
20.3 fps (7%)
Cinebench R11.5 OpenGL 64 Bit + AMD Radeon HD 6740G2
min: 14.9     avg: 22.4     median: 23.3 (8%)     max: 27.9 fps

Average Benchmarks AMD Radeon HD 6680G2 → 0% n=

Average Benchmarks AMD Radeon HD 6740G2 → 0% n=

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailed information on the benchmark results, click on the fps number.

Star Wars: The Old Republic

Star Wars: The Old Republic

2011
low 1024x768
Radeon HD 6740G2:
33.4  fps
high 1366x768
Radeon HD 6740G2:
22.1  fps
Anno 2070

Anno 2070

2011
low 1024x768
Radeon HD 6740G2:
94.2  fps
med. 1366x768
Radeon HD 6740G2:
39.4  fps
high 1366x768
Radeon HD 6740G2:
26.6  fps
low 1280x720
Radeon HD 6740G2:
26.4  fps
med. 1366x768
Radeon HD 6740G2:
24.9  fps
high 1366x768
Radeon HD 6740G2:
19.9  fps
low 1024x768
Radeon HD 6740G2:
37.2  fps
med. 1366x768
Radeon HD 6740G2:
28.9  fps
high 1366x768
Radeon HD 6740G2:
24.4  fps
Fifa 12

Fifa 12

2011
low 800x600
Radeon HD 6740G2:
135.9  fps
med. 1024x768
Radeon HD 6740G2:
88.7  fps
high 1360x768
Radeon HD 6740G2:
69.5  fps
F1 2011

F1 2011

2011
low 800x600
Radeon HD 6740G2:
47  fps
med. 1024x768
Radeon HD 6740G2:
31  fps
high 1366x768
Radeon HD 6740G2:
26  fps
low 1024x768
100%
Radeon HD 6680G2:
51  fps
149%
Radeon HD 6740G2:
76  fps
high 1366x768
100%
Radeon HD 6680G2:
27.8  fps
103%
Radeon HD 6740G2:
28.6  fps
Dirt 3

Dirt 3

2011
low 800x600
100%
Radeon HD 6680G2:
64.9  fps
105%
Radeon HD 6740G2:
68  fps
med. 1024x768
100%
Radeon HD 6680G2:
57.6  fps
71%
Radeon HD 6740G2:
40.7  fps
high 1360x768
100%
Radeon HD 6680G2:
23.7  fps
117%
Radeon HD 6740G2:
27.7  fps
Crysis 2

Crysis 2

2011
low 800x600
Radeon HD 6740G2:
51  fps
med. 1024x768
Radeon HD 6740G2:
34.5  fps
high 1366x768
Radeon HD 6740G2:
25.8  fps
Total War: Shogun 2

Total War: Shogun 2

2011
low 1024x768
100%
Radeon HD 6680G2:
88.5  fps
99%
Radeon HD 6740G2:
87.6  fps
med. 1280x720
100%
Radeon HD 6680G2:
30.5  fps
90%
Radeon HD 6740G2:
27.6  fps
low 800x600
100%
Radeon HD 6680G2:
46  fps
med. 1024x768
100%
Radeon HD 6680G2:
31.7  fps
121%
Radeon HD 6740G2:
38.3  fps
high 1360x768
100%
Radeon HD 6680G2:
25.2  fps
106%
Radeon HD 6740G2:
26.8  fps
low 1024x768
100%
Radeon HD 6680G2:
95  fps
107%
Radeon HD 6740G2:
101.2  fps
med. 1360x768
100%
Radeon HD 6680G2:
28.8  fps
142%
Radeon HD 6740G2:
41  fps
high 1360x768
100%
Radeon HD 6680G2:
20  fps
148%
Radeon HD 6740G2:
29.5  fps
low 800x600
Radeon HD 6740G2:
52.4  fps
med. 1360x768
Radeon HD 6740G2:
33.4  fps
low 1024x768
100%
Radeon HD 6680G2:
55  fps
125%
Radeon HD 6740G2:
68.8  fps
med. 1366x768
100%
Radeon HD 6680G2:
44.4  fps
137%
Radeon HD 6740G2:
61  fps
high 1366x768
100%
Radeon HD 6680G2:
33.1  fps
147%
Radeon HD 6740G2:
48.8  fps
low 800x600
100%
Radeon HD 6680G2:
94  fps
med. 1024x768
100%
Radeon HD 6680G2:
33.6  fps
high 1366x768
100%
Radeon HD 6680G2:
28.2  fps
Risen

Risen

2009
low 800x600
100%
Radeon HD 6680G2:
43  fps
114%
Radeon HD 6740G2:
49  fps
med. 1024x768
100%
Radeon HD 6680G2:
24.6  fps
135%
Radeon HD 6740G2:
33.1  fps
high 1366x768
100%
Radeon HD 6680G2:
16.6  fps
151%
Radeon HD 6740G2:
25  fps

Average Gaming AMD Radeon HD 6680G2 → 100%

Average Gaming 30-70 fps → 100%

Average Gaming AMD Radeon HD 6740G2 → 120%

Average Gaming 30-70 fps → 122%

AMD Radeon HD 6740G2lowmed.highultraQHD4K
Star Wars: The Old Republic33.422.1
Anno 207094.239.426.6
The Elder Scrolls V: Skyrim26.424.919.9
Battlefield 337.228.924.4
Fifa 12135.988.769.5
F1 2011473126
Deus Ex Human Revolution7628.6
Dirt 36840.727.67
Crysis 25134.525.8
Total War: Shogun 287.627.6
Call of Duty: Black Ops38.326.8
StarCraft 2101.24129.5
Metro 203352.433.4
Battlefield: Bad Company 268.86148.8
Risen4933.125
< 30 fps
< 60 fps
< 120 fps
≥ 120 fps
1
6
6
1
3
8
2
11
1
1









AMD Radeon HD 6680G2lowmed.highultraQHD4K
Deus Ex Human Revolution5127.8
Dirt 364.957.623.7
Total War: Shogun 288.530.5
Call of Duty: Black Ops4631.725.2
StarCraft 29528.820
Battlefield: Bad Company 25544.433.1
CoD Modern Warfare 29433.628.2
Risen4324.616.6
< 30 fps
< 60 fps
< 120 fps
≥ 120 fps

4
4
2
5

6
1










For more games that might be playable and a list of all games and graphics cards visit our Gaming List

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Redaktion, 2017-09- 8 (Update: 2023-07- 1)