I am trying to decide whether to get One CPU or Two CPUs on Dell PowerEdge R710 Server. It comes with one Xeon E5620 2.4 GHz and 24GB RAM. I am going to run SBS2011 with Exchange with 60GB store size (no SQL server) for 20 User network (mostly running WORD/EXCEL/OUTLOOK/ACCESS).
Since R710 comes with two CPU sockets, if I decide to go with one CPU, will I be loosing some performance?
If I get two CPUs, when would I know that I am benefiting from extra CPU?
Thank you in advance.