Hello there, I'm thinking about getting the new iMac that come with the AMD Radeon R9 M390. I'm concern wether or not it will be provide GPU acceleration in Adobe Premiere Pro CC 2015, also rendering and playback via Mercury Engine. I'm been doing some research online but hasn't find anything clear about it. Really appreciate your help, thank you.
The MPE engine is the GPU acceleration player when in hardware mode. Open CL still lags behind Cuda for performance with Adobe. It also is less stable. It does work and should work with the M390 but I wouldn't expect the best performance or stability. Adobe has far more years behind the Cuda acceleration and Cuda from Nvidia is far more mature than Open CL at this point for R&D.
I forgot to thank you for your answer Eric! really appreciate your advice, all the best.