I want to try overclocking this board and don't understand what jumperfree mode is. I can't find any jumpers to change to go from auto to jumperfree. When I change cpu speed from auto to manual, the cpu multiple spot is greyed out. Does this mean I have a locked processor and can't overclock it? It's a Northwood 2.4 Ghz. Please excuse my stupidity but I'm just beginning to learn about overclocking. Any step by step help would be appreciated.