Allow Windows to use processor cache fully. I don’t understand that too:( There is dedicated Server with 2GB RAM. Navision (3.60) uses 870MB for Cash. That’s all. But- back to my issues with CPUs. Anybody can’t see real profit from using HyperThreading on server?Really? Then may be u saw negative impact of it ? How to measure that ? I hope - maybe somebody knows by experiance impact of counter’s “Switching Context” values over average? TIA V.