Hi experts, We've got 2-dual core AMD processor server running SQL server 2005 Standard SP3. OS is Windows 2003 Enterprise SP2. Only one CPU core is constantly pegged at 100% where as the other 3 are averaging 50-60%. SQL server is the only application installed so it does seem to utilize all cpu cores, however only one is maxed out. Affinity Mask is set to 0 Any idea what might be chewing up that one core?