I think it's interesting that of all the screenshots I'm seeing of people having FPS issues they all seem to be running Windows Server 2012. I'm on Server 2008 and have no performance issues.
34 Fps serverside is fine. If it starts to go below I think 15 Fps server side then I would look into some options. Also your min and maxbandwith should be adjusted.
MaxBandwidth is Bandwidth the server is guaranteed to never have. This value helps the server to estimate bandwidth available.
MinBandwith is Bandwidth the server is guaranteed to have (in bps). This value helps server to estimate bandwidth available. Increasing it to too optimistic values can increase lag and CPU load, as too many messages will be sent but discarded