Those are kinda high, 131F? The highest I would overclock is 2.4, but with temps like that, I'm not sure myself, would continue. How many fans do you have? Is your computer by a window, or air vent?
Kornowski your temps always seem to be high I reckon either your cpu and / or you heatsink are concave as, ever thought about lapping?
Your idle status is fine, but you should know that, if you continue, your load temps will go much higher. It is already at 55°C.
I think the recommended temp on load for the C2D is about 70*c. Whats your voltage? i think you could go higher...
Keep going until you cant get any further on the stock voltage, that should rise temps that muhc at all