Damn, you got this chip up to 3.5 ghz? What kind of cooling are you running? That's like Phenom II X4 970 territory. I pushed mine to 3.2 ghz but it got to over 60 degrees celcius during Prime so I'm just leaving it at stock clock. It doesn't choke on anything I throw at it for right now but good to know I've got headroom.
Sunbeam CCF120. Nothing like 590g of Copper and Aluminum, and a 120mm fan to keep it cool. My cheap old mATX board wasn't quite stable at 3.5 (I've had issues with the base clock anywhere above 240) so I'm currently rock solid at 1.325v and 3.41GHz. If you have the board for it, this thing probably has a good chance to hit 4GHz, just like most Denebs. It also runs ice cold. I've got the fan manually set to it's lowest setting, and it barely hits 50* in my poorly vented case.
EDIT: Just a note, my board locks the processor to use 1.35v or less. it wasn't an issue for me, as even at 3.5 I was more than stable there, (I got a couple wierd, probably board related, issues that made me scale down slightly) However, if you are thinking of going for 4GHz, and your board does the same, it might limit your OC.