psych

Hi all, I want to purchase an Arc as it seems like a cost effective way to transcode. Unraid is currently working on my i5 6600k and I have a gtx 970 shoved in there temporarily. From what I can read the iGPU on this chip and the actual dedicated card cannot or is not efficient at transcoding HEVC/H.265. Resizable bar is said to be needed for this the Arc to work at its best, but I've read conflicting information on whether it's needed if I only intend to transcode with it vs using it for gaming. Any words of wisdom from those who have tried? I would hate to invest in a whole other system if a $200 gpu is on the market that can do what I need .