well, it is my understanding that SpeedGrade uses the GPU for display the grading session in real time, but in the rendering process it only uses the CPU. So, I think that speed is OK.
Sorry, I would like too that SpeedGrade was more fast (using multiple GPU, for example).
Interesting. I would argue that it's one thing for the speed to be to spec and another thing altogether for the speed to be ok. I cannot put the software into production when there is a free tool out there that does the same thing, with the same quality results, at a rate that's 4-5x faster.
I know SpeedGrade is still in its infancy and that a major update is coming in October, but this should be priority #1 for the development team. Dailies grading is a big issue - I have to regrade the transcoded dailies we get from production about 75% of the time for a range of reasons - and its essential to have tools that can do it quickly and reliably.
Those render speeds make SpeedGrade both a misnomer and unusable when you're transcoding several days worth of 2K Alexa dailies and need it done before the editor gets on a plane.