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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 (compare) 880
Radeon HD 6755G2 (compare) 880
Radeon HD 6760G2 (compare) 880
Radeon HD 6740G2 880
Radeon HD 6720G2 (compare) 880
Radeon HD 6690G2 (compare) 880
Radeon HD 6680G2 (compare) 800
Radeon HD 6645G2 (compare) 560
Radeon HD 6640G2 (compare) 560
Radeon HD 6545G2 (compare) 480
Radeon HD 6540G2 (compare) 480
Radeon HD 6515G2 (compare) 400
Radeon HD 6510G2 (compare) 400
ArchitectureTerascale 2
Pipelines880 - unified
Shared Memoryno
DirectXDirectX 11, Shader 5.0
technology40 nm
Notebook Sizemedium sized
Date of Announcement14.06.2011

Benchmarks

3DMark 11 - Performance 1280x720
min: 1419     avg: 1601.5     median: 1624 (5%)     max: 1739 points
+ 4 benchmarks and specifications   + Show comparison chart
3DMark 11 - Performance GPU 1280x720
min: 1472     avg: 1576.7     median: 1597 (3%)     max: 1661 points
+ 3 benchmarks and specifications   - Hide comparison chart
3DMark Vantage
P Result 1280x1024 +
P GPU no PhysX 1280x1024 +
3DMark 03 - Standard 1024x768
min: 14350     avg: 17227     median: 17227 (9%)     max: 20104 Points
+ 2 benchmarks and specifications   + Show comparison chart
3DMark 05 - Standard 1024x768
10949 Points (23%)
+ 1 benchmarks and specifications   + Show comparison chart
3DMark 06 Standard 1280x1024 +
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
min: 17.5     avg: 17.7     median: 17.7 (8%)     max: 17.8 fps
+ 2 benchmarks and specifications   + Show comparison chart
Windows 7 Experience Index - Gaming graphics
min: 6.1     avg: 6.2     median: 6.2 (78%)     max: 6.3 points
+ 3 benchmarks and specifications   + Show comparison chart
Windows 7 Experience Index - Graphics
min: 5.2     avg: 5.3     median: 5.3 (67%)     max: 5.3 points
+ 3 benchmarks and specifications   + Show comparison chart
Cinebench R10 Shading 32Bit +
Cinebench R11.5 OpenGL 64Bit +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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

Star Wars: The Old Republic

2011
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

The Elder Scrolls V: Skyrim

2011
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

Battlefield 3

2011
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

Deus Ex Human Revolution

2011
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

Total War: Shogun 2

2011
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

Call of Duty: Black Ops

2010
med. 1024x768
38.3  fps    + Compare
high 1360x768
26.8  fps    + Compare
» With all tested laptops playable in detail settings med..
StarCraft 2

StarCraft 2

2010
low 1024x768
101.2  fps    + Compare
med. 1360x768
41  fps    + Compare