Originally Posted by sheppkvn
3GB is a good amount for a Media Server. I would not recommend a RAM disk if you ever want to turn your system on or off and also, I would not recommend a network adapter like @tompsonn since I agree with you that it is useless unless you want to hook your server up to all of the devices on you network individually which brought me to the question, how will you use this Plex media server, just to store recorded shows and watch on other devices on your house? or something else? That would help me help you determine whether to get a Xeon, or a Core Series proccessor based on the LGA 1155 socket. I'd recommend either the Pentium G2140, the 3240 for a little better quality, or the even better E3-1220 V2 for the best low-cost server performance.
I really hope this helps. +rep
3GB of RAM will not be enough for Plex + other things on the same box. The Pentium CPUs WILL NOT be enough for transcoding and streaming to multiple clients (bearing in mind the OP wants to use the server for other things). He does not need a Xeon, period.
The RAM disk is for transcoding. Transcoding is a bunch of data that nobody cares about except for Plex while it is streaming media. If you turn the server off, by definition you are no longer streaming media - so it does not matter that the contents of the RAM disk is cleared. I did not suggest a RAM disk to store critical data - of course that would be silly.
The network adapter is an excellent pick up at that price ($40 for a dual port server adapter from Intel!?), and with Linux you'll be able to bond both ports for more throughput (great for a media server where network is one of the most critical parts). Its an excellent pick up for later expansion down the road, for example, if additional clients need to stream from the Plex server.
I mean no harm, but this combined with your suggestion to buy a Razor Blade, frankly and bluntly, I do not think you know what you are talking about.
Additionally, were you asking for rep or giving the OP rep? If the former, that behavior is frowned upon.
@OP: That board looks OK - the 6GB of RAM you linked is for a triple-channel set up. If you get it, you'll be wasting it because that motherboard is not triple-channel.