He has already purchased one of the most cost effective and best overclocking boards available so I don't think it's a current concern. However, Plex transcoding of MPEG2 MKV for instance is very processor intensive. So if you have a lot of MakeMKV rips that you plan to utilize for multiple streams you're going to need as much horsepower as you can get. My AMD A6 is not capable of transcoding even a single MPEG2 MKV without quit a bit of pixelation. CPU is pegged at 100% for even lower bitrate DVD rips.
Running Windows Home Server 2011 Evil Abandoned Edition