<p>I am using Capture One 8 with an AMD HD5870 and it works but I will be upgrading to a HD 7950 in the next few days. I would be surprised if it did’t work on a 5770 although as Steven indicated it is not on the list of supported cards: http://www.phaseone.com/en/search/article.aspx?articleid=1720&languageid=1</p>
<p>My understanding is that Crossfire/SLI can be problematic with increased power consumption, heat, and issues such as flickering and locking up/crashes. By most accounts, a single GPU is preferable useless you are doing some serious/professional video editing.</p>
<p>Assuming you are on a Mac, I suggest searching the Mac Rumours forum for information on GPU's. It's one of the best sites on the topic. I recently posted a question regarding GPU's in one of the forums that may be useful: <br>
http://forums.macrumors.com/showthread.php?t=1818512</p>
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