First thing: have you read this guide
Looking at your screenshot, it's clear that you still have EIST enabled. The E6600 default multiplier is x9, and your running at x6 (due to EIST reducing the multiplier when not under load).
I suggest you read the guide and try and follow the steps suggested. If you are unsure about any aspect of the guide, repost and we'll try and help where we can.