AMD Radeon HD 6680G2 vs AMD Radeon HD 6640G2 vs AMD Radeon HD 6755G2

AMD Radeon HD 6680G2

► remove 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 6640G2

► remove AMD Radeon HD 6640G2

The AMD Radeon HD 6640G2 is the combination of a integrated AMD Radeon HD 6620G APU processor graphics card and a dedicated entry level AMD Radeon HD 6470M 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 6640G2 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 6755G2

► remove AMD Radeon HD 6755G2

The AMD Radeon HD 6755G2 is the combination of an integrated AMD Radeon HD 6620G or 6520G APU processor graphics card and a dedicated entry level AMD Radeon HD 6750M graphics card in CrossFire combination. This setup,  called AMD Dual Graphics or asymmetric CrossFire, uses AFR (Alternate Frame Rendering) to render alternating frames between the two graphics cores. As a result, the combination also suffers from the phenomenon known as micro stuttering.

The performance of the Radeon HD 6755G2 depends greatly on the driver support in 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 and therefore lower settings and older games are not accelerated. Due to the micro stuttering and performance issues, AMD Dual Graphics may impose more problems than performance gains.

Supported Features like PureVideo HD (UVD3) and OpenCL have similar performance to a discrete Radeon HD 6750M.

As both graphics cards are rendering frames, the power consumption is clearly greater than if only one GPU was active.

AMD Radeon HD 6680G2AMD Radeon HD 6640G2AMD Radeon HD 6755G2
ManufacturerAMDAMDAMD
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
800 - 560 - 880 -
nonono
DirectXDirectX 11, 5.0DirectX 11, 5.0DirectX 11, 5.0
Technology40 nm40 nm40 nm
Size
Introduced14.06.2011 14.06.2011 14.06.2011

3DMark 11 - Performance 1280x720
1105 points (3%)
min: 1511     avg: 1513     median: 1513 (4%)     max: 1515 points
3DMark 11 - Performance GPU 1280x720
1061 points (2%)
min: 1528     avg: 1529     median: 1529 (3%)     max: 1530 points
3DMark Vantage
P Result 1280x1024 + AMD Radeon HD 6680G2
P Result 1280x1024 + AMD Radeon HD 6755G2
P GPU no PhysX 1280x1024 + AMD Radeon HD 6680G2
P GPU no PhysX 1280x1024 + AMD Radeon HD 6755G2
3DMark 03 - Standard 1024x768
12732 Points (7%)
3DMark 05 - Standard 1024x768
8810 Points (17%)
3DMark 06 Standard 1280x1024 + AMD Radeon HD 6680G2
Standard 1280x1024 + AMD Radeon HD 6755G2
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
10.8 fps (5%)
18.8 fps (8%)
SPECviewperf 11
Siemens NX 1920x1080 + AMD Radeon HD 6755G2
Tcvis 1920x1080 + AMD Radeon HD 6755G2
SolidWorks 1920x1080 + AMD Radeon HD 6755G2
Pro/ENGINEER 1920x1080 + AMD Radeon HD 6755G2
Maya 1920x1080 + AMD Radeon HD 6755G2
Lightwave 1920x1080 + AMD Radeon HD 6755G2
Ensight 1920x1080 + AMD Radeon HD 6755G2
Catia 1920x1080 + AMD Radeon HD 6755G2
Windows 7 Experience Index - Gaming graphics
6.5 points (93%)
6.4 points (91%)
Windows 7 Experience Index - Graphics
5.9 points (84%)
6.4 points (91%)
Cinebench R10 Shading 32Bit + AMD Radeon HD 6680G2
Shading 32Bit + AMD Radeon HD 6755G2
Cinebench R11.5 OpenGL 64Bit + AMD Radeon HD 6680G2
OpenGL 64Bit + AMD Radeon HD 6755G2

Average Benchmarks AMD Radeon HD 6680G2 → 100%

Average Benchmarks AMD Radeon HD 6755G2 → 111%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

Anno 2070

Anno 2070

2011
low 1024x768
Radeon HD 6755G2:
67.7  fps
med. 1366x768
Radeon HD 6755G2:
18.1  fps
high 1366x768
Radeon HD 6755G2:
16.2  fps
Radeon HD 6755G2:
»
Fifa 12

Fifa 12

2011
low 800x600
Radeon HD 6755G2:
124.7  fps
med. 1024x768
Radeon HD 6755G2:
67.9  fps
high 1360x768
Radeon HD 6755G2:
47.3  fps
Radeon HD 6755G2:
»
low 1024x768
100%
Radeon HD 6680G2:
51 fps  fps
high 1366x768
100%
Radeon HD 6680G2:
27.8 fps  fps
Radeon HD 6680G2:
»
Dirt 3

Dirt 3

2011
low 800x600
100%
Radeon HD 6680G2:
64.9  fps
80%
Radeon HD 6755G2:
51.8  fps
med. 1024x768
100%
Radeon HD 6680G2:
57.6  fps
61%
Radeon HD 6755G2:
35.2  fps
high 1360x768
100%
Radeon HD 6680G2:
23.7  fps
134%
Radeon HD 6755G2:
31.8  fps
ultra 1920x1080
Radeon HD 6755G2:
13.7  fps
Radeon HD 6680G2:
»
Radeon HD 6755G2:
»
Crysis 2

Crysis 2

2011
low 800x600
Radeon HD 6755G2:
46.8  fps
med. 1024x768
Radeon HD 6755G2:
31.8  fps
high 1366x768
Radeon HD 6755G2:
24  fps
ultra 1920x1080
Radeon HD 6755G2:
8.9  fps
Radeon HD 6755G2:
»
Total War: Shogun 2

Total War: Shogun 2

2011
low 1024x768
100%
Radeon HD 6680G2:
88.5  fps
med. 1280x720
100%
Radeon HD 6680G2:
30.5  fps
Radeon HD 6680G2:
»
low 800x600
100%
Radeon HD 6680G2:
46 fps  fps
med. 1024x768
100%
Radeon HD 6680G2:
31.7 fps  fps
92%
Radeon HD 6755G2:
29.1  fps
high 1360x768
100%
Radeon HD 6680G2:
25.2 fps  fps
100%
Radeon HD 6755G2:
25.2  fps
Radeon HD 6680G2:
»
Radeon HD 6755G2:
»
Mafia 2

Mafia 2

2010
low 800x600
Radeon HD 6755G2:
45  fps
med. 1024x768
Radeon HD 6755G2:
37.6  fps
high 1360x768
Radeon HD 6755G2:
30.7  fps
ultra 1920x1080
Radeon HD 6755G2:
13.4  fps
Radeon HD 6755G2:
»
low 1024x768
100%
Radeon HD 6680G2:
95 fps  fps
78%
Radeon HD 6755G2:
74.1  fps
med. 1360x768
100%
Radeon HD 6680G2:
28.8 fps  fps
99%
Radeon HD 6755G2:
28.6  fps
high 1360x768
100%
Radeon HD 6680G2:
20 fps  fps
101%
Radeon HD 6755G2:
20.1  fps
ultra 1920x1080
Radeon HD 6755G2:
15.2  fps
Radeon HD 6680G2:
»
Radeon HD 6755G2:
»
low 800x600
Radeon HD 6755G2:
49.1 78.1 ~ 64 fps
med. 1360x768
Radeon HD 6755G2:
29.9 45.8 ~ 38 fps
high 1600x900
Radeon HD 6755G2:
19.6  fps
ultra 1920x1080
Radeon HD 6755G2:
7.1  fps
Radeon HD 6755G2:
»
low 1024x768
100%
Radeon HD 6680G2:
55 fps  fps
116%
Radeon HD 6755G2:
63.6  fps
med. 1366x768
100%
Radeon HD 6680G2:
44.4 fps  fps
109%
Radeon HD 6755G2:
48.2  fps
high 1366x768
100%
Radeon HD 6680G2:
33.1 fps  fps
107%
Radeon HD 6755G2:
35.4  fps
ultra 1920x1080
Radeon HD 6755G2:
18.8  fps
Radeon HD 6680G2:
»
Radeon HD 6755G2:
»
low 800x600
100%
Radeon HD 6680G2:
94 fps  fps
med. 1024x768
100%
Radeon HD 6680G2:
33.6 fps  fps
high 1366x768
100%
Radeon HD 6680G2:
28.2 fps  fps
Radeon HD 6680G2:
»
Risen

Risen

2009
low 800x600
100%
Radeon HD 6680G2:
43 fps  fps
136%
Radeon HD 6755G2:
58.4  fps
med. 1024x768
100%
Radeon HD 6680G2:
24.6 fps  fps
114%
Radeon HD 6755G2:
23.4 32.7 ~ 28 fps
high 1366x768
100%
Radeon HD 6680G2:
16.6 fps  fps
120%
Radeon HD 6755G2:
16.6 23.5 ~ 20 fps
Radeon HD 6680G2:
»
Radeon HD 6755G2:
»
Resident Evil 5

Resident Evil 5

2009
low 800x600
Radeon HD 6755G2:
50.6  fps
high 1360x768
Radeon HD 6755G2:
39.9  fps
ultra 1920x1080
Radeon HD 6755G2:
31.4  fps
Radeon HD 6755G2:
»
Need for Speed Shift

Need for Speed Shift

2009
med. 1024x768
Radeon HD 6755G2:
26.3  fps
high 1366x768
Radeon HD 6755G2:
22.4  fps
Radeon HD 6755G2:
»
Colin McRae: DIRT 2

Colin McRae: DIRT 2

2009
low 800x600
Radeon HD 6755G2:
69.5  fps
med. 1024x768
Radeon HD 6755G2:
59  fps
high 1360x768
Radeon HD 6755G2:
56.1  fps
Radeon HD 6755G2:
»
F.E.A.R. 2

F.E.A.R. 2

2009
low 800x600
Radeon HD 6755G2:
70.6  fps
med. 1024x768
Radeon HD 6755G2:
49.1  fps
high 1280x1024
Radeon HD 6755G2:
32.2  fps
ultra 1920x1080
Radeon HD 6755G2:
16.8  fps
Radeon HD 6755G2:
»
GTA IV - Grand Theft Auto

GTA IV - Grand Theft Auto

2008
low 800x600
Radeon HD 6755G2:
44.2  fps
med. 1024x768
Radeon HD 6755G2:
27.1  fps
high 1280x1024
Radeon HD 6755G2:
18.1  fps
Radeon HD 6755G2:
»
Racedriver: GRID

Racedriver: GRID

2008
low 800x600
Radeon HD 6755G2:
60.5  fps
med. 1024x768
Radeon HD 6755G2:
41.8  fps
high 1280x1024
Radeon HD 6755G2:
29  fps
Radeon HD 6755G2:
»
Trackmania Nations Forever

Trackmania Nations Forever

2008
low 640x480
Radeon HD 6755G2:
97.9  fps
high 1024x768
Radeon HD 6755G2:
30.3  fps
ultra 1920x1080
Radeon HD 6755G2:
14.2  fps
Radeon HD 6755G2:
»
Supreme Commander - FA Bench

Supreme Commander - FA Bench

2007
low 1024x768
Radeon HD 6755G2:
22.9  fps
med. 1024x768
Radeon HD 6755G2:
21.1  fps
high 1024x768
Radeon HD 6755G2:
19.5  fps
ultra 1920x1080
Radeon HD 6755G2:
12.3  fps
Radeon HD 6755G2:
»
Crysis - GPU Benchmark

Crysis - GPU Benchmark

2007
low 1024x768
Radeon HD 6755G2:
65.8  fps
med. 1024x768
Radeon HD 6755G2:
52.2  fps
high 1024x768
Radeon HD 6755G2:
37.8  fps
ultra 1920x1080
Radeon HD 6755G2:
11.3  fps
Radeon HD 6755G2:
»
Crysis - CPU Benchmark

Crysis - CPU Benchmark

2007
low 1024x768
Radeon HD 6755G2:
72.4  fps
med. 1024x768
Radeon HD 6755G2:
46.2  fps
high 1024x768
Radeon HD 6755G2:
31.2  fps
ultra 1920x1080
Radeon HD 6755G2:
10.2  fps
Radeon HD 6755G2:
»
World in Conflict - Benchmark

World in Conflict - Benchmark

2007
low 800x600
Radeon HD 6755G2:
85  fps
med. 1024x768
Radeon HD 6755G2:
33  fps
high 1024x768
Radeon HD 6755G2:
30  fps
ultra 1920x1080
Radeon HD 6755G2:
14  fps
Radeon HD 6755G2:
»
Call of Juarez Benchmark

Call of Juarez Benchmark

2006
high 1024x768
Radeon HD 6755G2:
35.5 35.8 ~ 36 fps
Radeon HD 6755G2:
»
Half Life 2 - Lost Coast Benchmark

Half Life 2 - Lost Coast Benchmark

2005
high 1024x768
Radeon HD 6755G2:
72.7  fps
Radeon HD 6755G2:
»
World of Warcraft

World of Warcraft

2005
low 800x600
Radeon HD 6755G2:
103.3  fps
med. 1024x768
Radeon HD 6755G2:
65.6  fps
high 1280x1024
Radeon HD 6755G2:
20.4  fps
Radeon HD 6755G2:
»

Average Gaming AMD Radeon HD 6680G2 → 100%

Average Gaming AMD Radeon HD 6755G2 → 103%

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Redaktion, 2017-09- 8 (Update: 2017-09-11)