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.
| Manufacturer | AMD |
| Radeon HD 6000G2 Series | |
| Architecture | Terascale 2 |
| Pipelines | 880 - unified |
| Shared Memory | no |
| DirectX | DirectX 11, Shader 5.0 |
| technology | 40 nm |
| Notebook Size | medium sized |
| Date of Announcement | 14.06.2011 |
Benchmarks
3DMark 11 - Performance 1280x720
min: 1419 avg: 1602 median: 1624 (5%) max: 1739 points
 | A8-3520M | | | | 1419 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 1602 |
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 1646 |
| Acer Aspire 5560G | A8-3510MX | 4096 MB | | | 1739 |
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3DMark 11 - Performance GPU 1280x720
min: 1472 avg: 1577 median: 1597 (3%) max: 1661 points
| | A8-3520M | | | | 1472 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 1597 |
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 1661 |
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ATI Radeon HD 5670 -7%
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3DMark Vantage
P Result 1280x1024 +3DMark Vantage - P Result 1280x1024
min: 4937 avg: 5088 median: 5088 (6%) max: 5239 Points
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 4937 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 5239 |
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NVIDIA GeForce GT 240 GDDR5 3%
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P GPU no PhysX 1280x1024 +3DMark Vantage - P GPU no PhysX 1280x1024
min: 4790 avg: 4956 median: 4956 (5%) max: 5122 Points
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 4790 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 5122 |
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3DMark 03 - Standard 1024x768
min: 14350 avg: 17227 median: 17227 (9%) max: 20104 Points
| Acer Aspire 5560G | A8-3510MX | 4096 MB | | | 14350 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 20104 |
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3DMark 05 - Standard 1024x768
10949 Points (21%)
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3DMark 06 Standard 1280x1024 +min: 6412 avg: 6754 median: 6753.5 (14%) max: 7095 Points
| Standard 1280x1024 |
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 6412 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 7095 |
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NVIDIA GeForce GT 220 1%
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Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
min: 17.5 avg: 17.7 median: 17.7 (7%) max: 17.8 fps
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 17.5 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 17.8 |
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Windows 7 Experience Index - Gaming graphics
min: 6.1 avg: 6.2 median: 6.2 (78%) max: 6.3 points
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 6.1 |
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 6.2 |
| Acer Aspire 5560G | A8-3510MX | 4096 MB | | | 6.3 |
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Windows 7 Experience Index - Graphics
min: 5.2 avg: 5.3 median: 5.3 (67%) max: 5.3 points
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 5.2 |
| Acer Aspire 5560G | A8-3510MX | 4096 MB | | | 5.3 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 5.3 |
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Cinebench R10 Shading 32Bit +Cinebench R10 - Shading 32Bit
min: 3628 avg: 3792 median: 3792 (19%) max: 3956 Points
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 3628 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 3956 |
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Cinebench R11.5 OpenGL 64Bit +Cinebench R11.5 - OpenGL 64Bit
min: 14.9 avg: 22.4 median: 23.3 (14%) max: 27.9 Points
| | A8-3520M | | | | 14.9 |
| Acer Aspire 5560G-8358G50Mnkk | A8-3500M | 8192 MB | 600 / 900 MHz | 1024MB Dual Graphics HD 6650M & HD 6620G Crossfire 8.834.1.2000 | 23.03 |
| Acer Aspire 7560G-83524G50Mnkk | A8-3520M | 4096 MB | 600 / 900 MHz | 1024MB DDR3-VRAM, Dual Graphics: Radeon HD 6620G + Radeon HD 6650M 8.901.3.0 | 23.59 |
| Acer Aspire 5560G | A8-3510MX | 4096 MB | | | 27.9 |
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- 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 detailed information on the benchmark results, click on the fps number.
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» The benchmarks indicate that the game is not playable in the tested settings.
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» With all tested laptops playable in detail settings med..
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» The benchmarks indicate that the game is not playable in the tested settings.
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» With all tested laptops playable in detail settings low.
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NVIDIA GeForce GTX 580 447%
» With all tested laptops playable in detail settings high.
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» With all tested laptops playable in detail settings low.
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» With all tested laptops playable in detail settings low.
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» With all tested laptops playable in detail settings med..
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ATI Radeon HD 5570 -6%
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ATI Radeon HD 5570 -7%
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ATI Radeon HD 5570 -11%
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» With all tested laptops playable in detail settings low.
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NVIDIA GeForce GTX 580 349%
» With all tested laptops playable in detail settings low.
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» With all tested laptops playable in detail settings med..
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ATI Radeon HD 5570 5%
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» With all tested laptops playable in detail settings med..
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ATI Radeon HD 5570 20%
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ATI Radeon HD 5570 -7%
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» With all tested laptops playable in detail settings low.
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ATI Radeon HD 5670 0%
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» With all tested laptops playable in detail settings high.
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ATI Radeon HD 5670 24%
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» With all tested laptops playable in detail settings low.
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
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