RAM end CPU depends on the traffic that you expect. Generally if you have one website on the server 1GB ram should be enough, but you should better use some process monitoring to determine the exact usage.
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items