This performance is, somehow, about the same as what we see with a 6-core i7 3930K + GTX 580 Classified (save for the Epic performance, as the 6-core machine has a Rocket). Transcoding Alexa footage with just a LUT applied, which I tested because we process a lot of dailies that way, was 50+ fps. A half-res 'good' decode of 5K Epic footage ran at 15-20 fps, so you'd still absolutely want a Rocket for R3D, unless maybe Red's GPU decoding delivers big in the next couple of months. Doing a half-res decode on 4K raw Sony F55 footage I was able to get to approximately nine nodes before dropping below real time.
#Late 2013 imac graphics card 1080p
With 1080p Alexa Log-C ProRes 4444, I was able to apply a LUT and add about 11-12 nodes of correction with a decent mix of qualifiers and power windows (including a couple of power windows containing blurs) before dropping below real-time. Source footage and timeline frame rate were both 23.98. Video output was done via UltraStudio Mini Monitor. All footage was played from external HDD and/or RAID, so internal storage speed wasn't being tested here.
I didn't do extensive systematic testing, I mostly just focused on the formats we usually work with.
#Late 2013 imac graphics card pro
Given what it took to get solid real-time Resolve performance on Mac Pro a few of years back, it's really sort of amazing how well this works and how smooth the whole process is. Resolve performance for HD/2K is really pretty good on this machine.
Mostly for editing, not so much for Resolve (have a new Mac Pro on the way for that), but I did run it through its paces a bit. Where it says 'None' there for items in the 'Video I/O and GPU tab' it's just referring to the fact that you have no video interface (e.g. Resolve's image processing is GPU-only, so if you've actually got an image on screen in the preview window of the color tab, Resolve is successfully using your GPU. Resolve will happily use a GPU not on its 'list' if it has the right capabilities, which that GPU does.
I believe the error message you're seeing is just a consequence of Resolve not having been updated to recognize the specific GPU models in the new iMacs yet it can just be ignored. Resolve supports using a single GPU for both image processing and GUI now, and both 9 and 10 contained performance optimizations for such configurations, such that with a sufficiently powerful GPU they're now entirely viable. Demetry wrote:While reading your post I just realised, that since the iMac's have only one GPU, Resolve won't be able to use the GPU and the available CUDA for image processing, am I right ? I have attached a screenshot with the error message anyway.
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