Right, standard edition.
Standard is hard-capped at 2GB of memory. It can't use more so the other 4GB of memory you have on that server is wasted. So the 1.6GB looks correct, the rest is the mem-to-leave section of memory (non-buffer memory)
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability