Notebookcheck

AMD Radeon HD 7640G + HD 7670M Dual Graphics

The AMD Radeon HD 7640G + HD 7670M Dual Graphics is the combination of a integrated AMD Radeon HD 7640G APU processor graphics card and a dedicated entry level 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 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. Therefore, due to the micro stuttering and performance problems, Dual Graphics may impose more problems than bring performance gains. Only in a best case scenario the performance is similar to the GeForce GT 635M.

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 7600M Series
Radeon HD 7690M XT (compare) 480 @ 725 MHz128 Bit @ 3600 MHz
Radeon HD 7690M (compare) 480 @ 600 - 725 (Boost) MHz128 Bit @ 3600/1800 MHz
Radeon HD 7660G + HD 7670M Dual Graphics (compare) 862 @ 685 / 600 MHz128 Bit @ 1800 MHz
Radeon HD 7640G + HD 7670M Dual Graphics 736 @ 655 / 600 MHz128 Bit @ 1800 MHz
Radeon HD 7520G + HD 7670M Dual Graphics (compare) 736 @ 655 / 600 MHz128 Bit @ 1800 MHz
Radeon HD 7670M (compare) 480 @ 600 MHz128 Bit @ 1800 MHz
Radeon HD 7650M (compare) 480 @ 450 - 550 (Boost) MHz128 Bit @ 1800 MHz
Radeon HD 7630M (compare) 480 @ 450 MHz128 Bit @ 1800 MHz
Radeon HD 7640G + HD 7610M Dual Graphics (compare) 656 @ 655 / 450 MHz128 Bit @ 1800 MHz
Radeon HD 7610M (compare) 400 @ 450 MHz128 Bit @ 1600 MHz
ArchitectureTerascale 3
Pipelines736 - unified
Core Speed655 / 600 MHz
Memory Speed1800 MHz
Memory Bus Width128 Bit
Shared Memoryyes
DirectXDirectX 11, Shader 5.0
technology32/40 nm
Notebook Sizemedium sized
Date of Announcement15.05.2012

Benchmarks

3DMark - Cloud Gate Standard Score 1280x720
min: 3566     avg: 3709     median: 3566 (6%)     max: 3995 Points
3DMark - Cloud Gate Standard Graphics 1280x720
min: 5715     avg: 6137.7     median: 5715 (3%)     max: 6983 Points
3DMark - Fire Strike Score 1920x1080
min: 529     avg: 570.7     median: 529 (2%)     max: 654 Points
3DMark - Fire Strike Graphics 1920x1080
min: 623     avg: 666.3     median: 623 (2%)     max: 753 Points
3DMark - Ice Storm Standard Graphics 1280x720
min: 37273     avg: 48281.7     median: 53786 (7%)     max: 53786 Points
3DMark 11 - Performance 1280x720
min: 1585     avg: 1626.3     median: 1628 (5%)     max: 1664 points
3DMark 11 - Performance GPU 1280x720
min: 1629     avg: 1671     median: 1649 (3%)     max: 1757 points
3DMark Vantage
P Result 1280x1024 +
P GPU no PhysX 1280x1024 +
3DMark 05 - Standard 1024x768
min: 10288     avg: 10402.7     median: 10288 (22%)     max: 10632 Points
3DMark 06 Standard 1280x1024 +
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.

Crysis 3

Crysis 3

2013
low 1024x768
28.7  fps    + Compare
med. 1366x768
15  fps    + Compare
high 1366x768
10.5  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1024x768
99.2  fps    + Compare
med. 1366x768
45.9  fps    + Compare
high 1366x768
35.9  fps    + Compare
» With all tested laptops playable in detail settings high.
low 1024x768
19.9  fps    + Compare
med. 1366x768
18.7  fps    + Compare
high 1366x768
13.4  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
Fifa 13

Fifa 13

2012
low 1024x768
130.8 133 ~ 132 fps    + Compare
med. 1366x768
100.9 108 ~ 104 fps    + Compare
high 1366x768
99.4 103 ~ 101 fps    + Compare
ultra 1920x1080
65 71 ~ 68 fps    + Compare
» With all tested laptops playable in detail settings ultra.
low 1024x768
34.2 37.4 ~ 36 fps    + Compare
med. 1366x768
26.7  fps    + Compare
high 1366x768
25.5  fps    + Compare
» With most tested laptops playable in detail settings low.
low 1024x768
78.5 96 98 ~ 91 fps    + Compare
med. 1366x768
74 74 ~ 74 fps    + Compare
high 1366x768
65.4 70 ~ 68 fps    + Compare
ultra 1920x1080
43.3 48 ~ 46 fps    + Compare
» With all tested laptops playable in detail settings ultra.
Anno 2070

Anno 2070

2011
low 1024x768
69 74.9 90 ~ 78 fps    + Compare
med. 1366x768
28 31.8 ~ 30 fps    + Compare
high 1366x768
19 20.6 ~ 20 fps    + Compare
» With all tested laptops playable in detail settings low.
low 1280x720
35.1  fps    + Compare
med. 1366x768
30.8  fps    + Compare
high 1366x768
25.1  fps    + Compare
» With all tested laptops playable in detail settings low.