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AMD Radeon HD 6740G2

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.

ManufacturerAMD
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
ArchitectureTerascale 2
Pipelines880 - unified
Shared Memoryno
DirectXDirectX 11, Shader 5.0
technology40 nm
Notebook Sizemedium sized
Date of Announcement14.06.2011
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark 11 - Performance GPU 1280x720
0% 100%
min: 1472      avg: 1576.7 (7%)     median: 1597 (7%)     max: 1661 points
3DMark 11 - Performance 1280x720
0% 100%
min: 1419      avg: 1601.5 (9%)     median: 1624 (9%)     max: 1739 points
3DMark Vantage - P GPU no PhysX 1280x1024
0% 100%
min: 4790      avg: 4956 (10%)     median: 4956 (10%)     max: 5122 Points
3DMark Vantage - P Result no PhysX 1280x1024
0% 100%
min: 4937      avg: 5088 (11%)     median: 5088 (11%)     max: 5239 Points
3DMark 06
0% 100%
min: 6412      avg: 6753.5 (18%)     median: 6753.5 (18%)     max: 7095 Points
3DMark 05 - Standard 1024x768
0% 100%
min: 10949      avg: 10949 (30%)     median: 10949 (30%)     max: 10949 Points
3DMark 03 - Standard 1024x768
0% 100%
min: 14350      avg: 17227 (11%)     median: 17227 (11%)     max: 20104 Points
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
0% 100%
min: 17.5      avg: 17.7 (9%)     median: 17.7 (9%)     max: 17.8 fps
PCMark Vantage - Gaming Score 1024x768
0% 100%
min: 3672      avg: 3836.5 (15%)     median: 3836.5 (15%)     max: 4001 Points
Cinebench R11.5 - OpenGL 64Bit
0% 100%
min: 14.9      avg: 22.4 (18%)     median: 23.3 (19%)     max: 27.9 Points
Cinebench R10 - Shading 32Bit
0% 100%
min: 3628      avg: 3792 (26%)     median: 3792 (26%)     max: 3956 Points
Windows 7 Experience Index - Gaming graphics
0% 100%
min: 6.1      avg: 6.2 (78%)     median: 6.2 (78%)     max: 6.3 points
Windows 7 Experience Index - Graphics
0% 100%
min: 5.2      avg: 5.3 (67%)     median: 5.3 (67%)     max: 5.3 points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

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 detailled information on the benchmark results, click on the fps number.

Star Wars: The Old Republic
low 1024x768
33.4  fps      Compare
high 1366x768
22.1  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Anno 2070

Anno 2070

2011
low 1024x768
94.2 fps  fps      Compare
med. 1366x768
39.4 fps  fps      Compare
high 1366x768
26.6 fps  fps      Compare
» With all tested laptops playable in detail settings med..
The Elder Scrolls V: Skyrim
low 1280x720
26.4 fps  fps      Compare
med. 1366x768
24.9 fps  fps      Compare
high 1366x768
19.9 fps  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Battlefield 3
low 1024x768
37.2 fps  fps      Compare
med. 1366x768
28.9 fps  fps      Compare
high 1366x768
24.4 fps  fps      Compare
» With all tested laptops playable in detail settings low.
Fifa 12

Fifa 12

2011
low 800x600
135.9 fps  fps      Compare
med. 1024x768
88.7 fps  fps      Compare
high 1360x768
69.5 fps  fps      Compare
» With all tested laptops playable in detail settings high.
F1 2011

F1 2011

2011
low 800x600
47 fps  fps      Compare
med. 1024x768
31 fps  fps      Compare
high 1366x768
26 fps  fps      Compare
» With all tested laptops playable in detail settings low.
Deus Ex Human Revolution
low 1024x768
76  fps      Compare
high 1366x768
28.6  fps      Compare
» With all tested laptops playable in detail settings low.
Dirt 3

Dirt 3

2011
low 800x600
68  fps      Compare
med. 1024x768
40.7  fps      Compare
high 1360x768
27.7  fps      Compare
» With all tested laptops playable in detail settings med..
Crysis 2

Crysis 2

2011
low 800x600
51 fps  fps      Compare
med. 1024x768
34.5 fps  fps      Compare
high 1366x768
25.8 fps  fps      Compare
» With all tested laptops playable in detail settings low.
Total War: Shogun 2
low 1024x768
87.6  fps      Compare
med. 1280x720
27.6  fps      Compare
» With all tested laptops playable in detail settings low.
Call of Duty: Black Ops
med. 1024x768
38.3  fps      Compare
high 1360x768
26.8  fps      Compare
» With all tested laptops playable in detail settings med..
StarCraft 2
low 1024x768
101.2  fps      Compare
med. 1360x768
41  fps      Compare
high 1360x768
29.5  fps      Compare
» With all tested laptops playable in detail settings med..
Metro 2033
low 800x600
52.4  fps      Compare
med. 1360x768
33.4  fps      Compare
» With all tested laptops playable in detail settings low.
Battlefield: Bad Company 2
low 1024x768
68.8  fps      Compare
med. 1366x768
61  fps      Compare
high 1366x768
48.8  fps      Compare
» With all tested laptops playable in detail settings high.
Risen

Risen

2009
low 800x600
49  fps      Compare
med. 1024x768
33.1  fps      Compare