i3-2310m

Hello. I'm running Ubuntu Oneiric x64 in a HP 430 laptop. I have an Intel i3-2310M processor but some times one shows up running at 1200 Mhz and the other 3 at 800 Mhz. I've read that i3 processors have only two cores (and, as I understood, they must run at 2.10 Ghz each one). There's a imp...