Asus Taichi 31 Review
AMD A6-1450 APU "Temash" Review
Lenovo ThinkPad X230t Review
Sony Xperia Tablet Z Review

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 1280x720
0% 100%
min: 1419     avg: 1601.5 (15%)     max: 1739 points
3DMark 11 - Performance GPU 1280x720
0% 100%
min: 1472     avg: 1576.7 (14%)     max: 1661 points
3DMark Vantage - P Result no PhysX 1280x1024
0% 100%
min: 4937     avg: 5088 (14%)     max: 5239 Points
3DMark Vantage - P GPU no PhysX 1280x1024
0% 100%
min: 4790     avg: 4956 (13%)     max: 5122 Points
3DMark 06
0% 100%
min: 6412     avg: 6753.5 (23%)     max: 7095 Points
3DMark 05 - Standard 1024x768
0% 100%
min: 10949     avg: 10949 (30%)     max: 10949 Points
3DMark 03 - Standard 1024x768
0% 100%
min: 14350     avg: 17227 (11%)     max: 20104 Points
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
0% 100%
min: 17.5     avg: 17.7 (12%)     max: 17.8 fps
PCMark Vantage - Gaming Score 1024x768
0% 100%
min: 3672     avg: 3836.5 (15%)     max: 4001 Points
Cinebench R11.5 - OpenGL 64Bit
0% 100%
min: 14.9     avg: 22.4 (25%)     max: 27.9 Points
Cinebench R10 - Shading 32Bit
0% 100%
min: 3628     avg: 3792 (35%)     max: 3956 Points
Windows 7 Experience Index - Graphics
0% 100%
min: 5.2     avg: 5.3 (67%)     max: 5.3 points
Windows 7 Experience Index - Gaming graphics
0% 100%
min: 6.1     avg: 6.2 (78%)     max: 6.3 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
Star Wars: The Old Republic (2011)
low:
33.4  fps      Compare
high:
22.1  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Anno 2070
Anno 2070 (2011)
low:
94.2  fps      Compare
med.:
39.4  fps      Compare
high:
26.6  fps      Compare
» With all tested laptops playable in detail settings med..
The Elder Scrolls V: Skyrim
low:
26.4  fps      Compare
med.:
24.9  fps      Compare
high:
19.9  fps      Compare
» The benchmarks indicate that the game is not playable in the tested settings.
CoD: Modern Warfare 3 (2011): Playable with a weaker graphics card in detail settings low. - more...
Battlefield 3
low:
37.2  fps      Compare
med.:
28.9  fps      Compare
high:
24.4  fps      Compare
» With all tested laptops playable in detail settings low.
Batman: Arkham City (2011): Playable with a weaker graphics card in detail settings med.. - more...
Fifa 12
Fifa 12 (2011)
low:
135.9  fps      Compare
med.:
88.7  fps      Compare
high:
69.5  fps      Compare
» With all tested laptops playable in detail settings high.
F1 2011
F1 2011 (2011)
low:
47  fps      Compare
med.:
31  fps      Compare
high:
26  fps      Compare
» With all tested laptops playable in detail settings low.
Deus Ex Human Revolution
low:
76  fps      Compare
high:
28.6  fps      Compare
» With all tested laptops playable in detail settings low.
Dirt 3
Dirt 3 (2011)
low:
68  fps      Compare
med.:
40.7  fps      Compare
high:
27.7  fps      Compare
» With all tested laptops playable in detail settings med..
The Witcher 2: Assassins of Kings (2011): Not playable with a weaker graphics card. - more...
Crysis 2
Crysis 2 (2011)
low:
51  fps      Compare
med.:
34.5  fps      Compare
high:
25.8  fps      Compare
» With all tested laptops playable in detail settings low.
Total War: Shogun 2
Total War: Shogun 2 (2011)
low:
87.6  fps      Compare
med.:
27.6  fps      Compare
» With all tested laptops playable in detail settings low.
Call of Duty: Black Ops
med.:
38.3  fps      Compare
high:
26.8  fps      Compare
» With all tested laptops playable in detail settings med..
Fifa 11 (2010): Playable with a weaker graphics card in detail settings ultra. - more...
StarCraft 2
StarCraft 2 (2010)
low:
101.2  fps      Compare
med.:
41  fps      Compare
high:
29.5  fps      Compare
» With all tested laptops playable in detail settings med..
Just Cause 2 (2010): Not playable with a weaker graphics card. - more...
Metro 2033
Metro 2033 (2010)
low:
52.4  fps      Compare
med.:
33.4  fps      Compare
» With all tested laptops playable in detail settings low.
Dawn of War II - Chaos Rising (2010): Playable with a weaker graphics card in detail settings high. - more...
Battlefield: Bad Company 2
low:
68.8  fps      Compare
med.:
61  fps      Compare
high:
48.8  fps      Compare
» With all tested laptops playable in detail settings high.
Stalker: Call of Pripyat (2010): Not playable with a weaker graphics card. - more...
Risen
Risen (2009)
low:
49  fps      Compare