Stuttering 4k Video
Hello, I've just recently started working with 4k video on an older Mac Pro, and even though I'm working with a 1/16 proxy, I still can't manage to get smooth video playback. Once I export the videos play fine, but I can't work when the source footage is choppy or freezes as it currently does.
I currently have OS X El Capitan Version 10.11.6, I have a Mac Pro (Mid 2012)
Processor: 2 x 2.4 GHz 6-Core Intel Xeon
Memory: 28 GB 1333 MHz DDR3 ECC
Graphics ATI Radeon HD 5770 1024 MB
Do you think more RAM would fix the issue?
Thank you for your help!

