I graded a music video yesterday from R3Ds on a 2008 mac pro. At 1/8 Rez good I was getting solid 24fps playback with sound and to be honest the resolution was sufficient, and definitely worth realtime playback.
I only had to swap out a few shots into half rez good to check my keying.
One thing I’m wondering about though – when I tried to do a render out to Quicktime using Full Rez Premium setting, I started getting dropped frame, frame skipped error. I understand my computer is no longer a beast, but when rendering, why would DaVinci have to skip frames? Shouldn’t it just go slower?