AMD Radeon HD 6620G + HD 7670M Dual Graphics vs AMD Radeon HD 6480G + HD 7450M Dual Graphics
AMD Radeon HD 6620G + HD 7670M Dual Graphics
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The AMD Radeon HD 6620G + HD 7670M Dual Graphics is the combination of a integrated AMD Radeon HD 6620G APU processor graphics card and a dedicated AMD Radeon HD 7670M 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 Dual Graphics solution greatly depends 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. Due to the micro stuttering and performance problems, Dual Graphics may impose more problems than bring performance gains. Therefore, we rate the performance on average on a level with the Radeon HD 7670M alone.
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 6480G + HD 7450M Dual Graphics
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The AMD Radeon HD 6480G + HD 7450M Dual Graphics is a asymmetric Crossfire combination of the Radeon HD 6480G processor graphics card (in Llano APUs) and a dedicated Radeon HD 7450M. The combination was formerly known as Radeon HD 6510G2 (with the Radeon HD 6450M instead of the 7450M which are both based on the same chip).
The Crossfire mode only works for DX10 and DX11 games and may sometimes even decrease performance. In our tests the performance of the combination ranged from a Intel HD Graphics 3000 to a Radeon HD 6490M. Hovever, the combination also suffers from micro stuttering.
| AMD Radeon HD 6620G + HD 7670M Dual Graphics | AMD Radeon HD 6480G + HD 7450M Dual Graphics | |||||||||||||||||||||||||
| AMD Radeon HD 7400M Series |
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| Architecture | Terascale 2 | Terascale 2 | ||||||||||||||||||||||||
| Pipelines | 880 - unified | 400 - unified | ||||||||||||||||||||||||
| Core Speed | 400 / 600 MHz | 593 / 700 MHz | ||||||||||||||||||||||||
| Memory Speed | 1800 MHz | - / 1800 MHz | ||||||||||||||||||||||||
| Shared Memory | yes | yes | ||||||||||||||||||||||||
| API | DirectX 11, Shader 5.0 | DirectX 11, Shader 5.0 | ||||||||||||||||||||||||
| technology | 40 nm | 40 nm | ||||||||||||||||||||||||
| Date of Announcement | 08.02.2012 | 08.02.2012 | ||||||||||||||||||||||||
| Memory Bus Width | 64 Bit |
Benchmarks
3DM Vant. Perf. total + AMD Radeon HD 6620G + HD 7670M Dual Graphics
Average Benchmarks AMD Radeon HD 6620G + HD 7670M Dual Graphics → 100% n=9
Average Benchmarks AMD Radeon HD 6480G + HD 7450M Dual Graphics → 74% n=9
- Average benchmark values for this graphics card* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation
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.
Tomb Raider
2013
Dead Space 3
2013
Hitman: Absolution
2012
Fifa 13
2012
F1 2012
2012
Dirt Showdown
2012
Star Wars: The Old Republic
2011
Anno 2070
2011
Battlefield 3
2011
Fifa 12
2011
F1 2011
2011
Dirt 3
2011
Crysis 2
2011
Mafia 2
2010
StarCraft 2
2010
Metro 2033
2010Average Gaming AMD Radeon HD 6620G + HD 7670M Dual Graphics → 100%
Average Gaming 30-70 fps → 100%
Average Gaming AMD Radeon HD 6480G + HD 7450M Dual Graphics → 54%
Average Gaming 30-70 fps → 66%
| AMD Radeon HD 6620G + HD 7670M Dual Graphics | AMD Radeon HD 6480G + HD 7450M Dual Graphics | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| low | med. | high | ultra | QHD | 4K | low | med. | high | ultra | QHD | 4K | |||
| StarCraft II: Heart of the Swarm | 96.1 | 43.4 | 34.9 | 16 | ||||||||||
| Tomb Raider | 89 | 50.4 | 30.6 | 12.8 | ||||||||||
| Dead Space 3 | 92.5 | 45.2 | 35.3 | 20.9 | ||||||||||
| Hitman: Absolution | 19.6 | 17.6 | 12.7 | |||||||||||
| Fifa 13 | 120.5 | 90.5 | 88.9 | 54.2 | ||||||||||
| F1 2012 | 35 | 29 | 27 | |||||||||||
| Dirt Showdown | 41 | 30.5 | 29.6 | |||||||||||
| Anno 2070 | 103.8 | 41 | 27.4 | 68.9 | 16.5 | 10.8 | ||||||||
| The Elder Scrolls V: Skyrim | 40.2 | 32.9 | 23 | 27.9 | 17.3 | 12.4 | ||||||||
| AMD Radeon HD 6620G + HD 7670M Dual Graphics | AMD Radeon HD 6480G + HD 7450M Dual Graphics | |||||||||||||
| low | med. | high | ultra | QHD | 4K | low | med. | high | ultra | QHD | 4K | < 30 fps < 60 fps < 120 fps ≥ 120 fps | 1 3 4 1 | 2 6 1 | 5 3 1 | 3 1 | | | < 30 fps < 60 fps < 120 fps ≥ 120 fps | 1 1 | 2 | 2 | | | |
For more games that might be playable and a list of all games and graphics cards visit our Gaming List
