AMD Radeon HD 6620G + HD 7670M Dual Graphics

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.

Manufacturer

AMD

AMD Radeon HD 7400M Series

Radeon HD 6620G + HD 7670M Dual Graphics	880 @ 400 / 600 MHz	? Bit @ 1800 MHz
Radeon HD 6620G + HD 7450M Dual Graphics	560 @ 400 / 700 MHz	? Bit @ 1800 MHz
Radeon HD 6520G + HD 7450M Dual Graphics	480 @ 400 / 700 MHz	64 Bit @ 1800 MHz
Radeon HD 6480G + HD 7450M Dual Graphics	400 @ 593 / 700 MHz	64 Bit @ - / 1800 MHz

Architecture

Terascale 2

Pipelines

880 - unified

Core Speed *

400 / 600 MHz

Memory Speed *

1800 MHz

Shared Memory

yes

DirectX

DirectX 11, Shader 5.0

technology

32+40nm nm

Date of Announcement

08.02.2012

* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark - Fire Strike Graphics 1920x1080

100%

min: 777 avg: 777 (2%) median: 777 (2%) max: 777 Points

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3DMark - Fire Strike Score 1920x1080

100%

min: 603 avg: 603 (3%) median: 603 (3%) max: 603 Points

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3DMark - Cloud Gate Standard Graphics 1280x720

100%

min: 9719 avg: 9719 (6%) median: 9719 (6%) max: 9719 Points

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3DMark - Cloud Gate Standard Score 1280x720

100%

min: 4680 avg: 4680 (9%) median: 4680 (9%) max: 4680 Points

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3DMark - Ice Storm Standard Graphics 1280x720

100%

min: 57082 avg: 57082 (8%) median: 57082 (8%) max: 57082 Points

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ComputeMark v2.1 - Normal, Score 1024x600

100%

min: 748 avg: 748 (3%) median: 748 (3%) max: 748 Points

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LuxMark v2.0 64Bit - Room GPUs-only

100%

min: 148 avg: 148 (3%) median: 148 (3%) max: 148 Samples/s

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LuxMark v2.0 64Bit - Sala GPUs-only

100%

min: 309 avg: 309 (3%) median: 309 (3%) max: 309 Samples/s

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3DMark 11 - Performance GPU 1280x720

100%

min: 1600 avg: 1600 (3%) median: 1600 (3%) max: 1600 points

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3DMark 11 - Performance 1280x720

100%

min: 1604 avg: 1604 (6%) median: 1604 (6%) max: 1604 points

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3DMark Vantage
P GPU no PhysX 1280x1024 +

P Result 1280x1024 +

3DMark 06 Standard 1280x1024 +

PCMark Vantage - Gaming Score 1024x768

100%

min: 3500 avg: 3500 (11%) median: 3500 (11%) max: 3500 Points

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Cinebench R11.5 OpenGL 64Bit +

Cinebench R10 Shading 32Bit +

Windows 7 Experience Index - Gaming graphics

100%

min: 5.9 avg: 5.9 (75%) median: 5.9 (75%) max: 5.9 points

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Windows 7 Experience Index - Graphics

100%

min: 4.3 avg: 4.3 (54%) median: 4.3 (54%) max: 4.3 points

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- 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.