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Equipped with the latest version of the AMD UVD (universal video decoder), the HD 6000 series handles H.264 and VC-1 video with ease, using less than 10% CPU load during playback. Rendering Flash was more demanding, with almost 30% CPU usage playing 1080p Flash clips in full screen mode on an LCD with a resolution of only 1440x900.
The additional CPU resources required for playing Flash also contributed to an increase in system power consumption. We observed an increase of 50% in power when playing our high definition YouTube trailer compared to other video formats tested. The 6670 was more energy efficient than the 6570, just as it was during our full load test. According to GPU-Z, both cards were running at their maximum clock/memory speeds with a core voltage of 1.10V in these scenarios.
WMV-HD video quality comparison: HD 5570 vs. HD 6570. Click for a larger image.
We also observed some differences in picture quality compared to the HD 5000 series. Compared side to side, our WMV-HD test clip seemed overly saturated by the HD 5570, while the HD 6570 produced a hazier, but perhaps more accurate rendition.
Flash video quality comparison: HD 5570 vs. HD 6570. Click for a larger image.
The Avatar Flash trailer looked almost identical on the two cards, but after reviewing several screenshots we found a slight difference in skin color of Colonel Quaritch. The HD 5570 depicted him with a pinkish hue, while the HD 6570 paints him with a slightly yellower tone.
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