Hi,
Same issue here, i tried with 9.5.3 and with 9.6, both eating RAM, i had to downgrade to 9.5.2.
Another issue i’m experimenting is that there is a delay from the desktop viewer to the video output of 5-6 frames, which is a pain in the ass to audio sync editing. This delay is there in every version. No delay with FCPX or FCP7.
I’m using a MacPro 4,1 – 16GB RAM – RAID 0 6TB and Decklink SDI.