I have a 2 y.o. Dell xps 630i with a Q6600 processor. The BIOS appears to have addressable parameters for many of the motherboard features. Would there be a great advantage to really overclock this processor? It says it is overclocked at 9x now, with a max value of 20x. Then there is the voltage issue. Or am I playing with fire here, since I am getting a 5.9 rating presently for a score?