Also don't forget you have a lot of options on the secondary market for E5 v3's right now. For example the E5-2660V3 is the same speed (actually base clock is 100mhz higher) as the 2680, but with 2 less cores (10 vs. 12). It's also got a 105w TDP vs. 120w. And you can find them on Ebay for around $230. If you don't absolutely need the extra 2 cores - and if you needed 12 cores instead of 10 I imagine you'd know it - that's an option that would save you some money and power/thermal output. The max turbo on both is 3.3GHz, though you probably already know you'll never see that in a multi-use environment like Unraid since it depends on all but one core being idle. The real turbo speed in my experience is a hair over 3GHz, for all cores. Emby seems to do a better job, in my experience, than Plex when it comes to scaling across cores. They both use ffmpeg but they also both modify it to their own needs and use different builds. I still run a Plex server because my parents are shared with it and I am not mentally ready to walk them through switching yet so this is something I've noticed over the last year. My Emby server can push 4 1080p streams without breaking a sweat and of course Direct Play uses very little CPU so I can do that too. This is running inside a Debian VM with docker that has 6 of my 12 cores (physical cores) assigned to it.