Just for a point of reference, my 30 capper 3.0C can do 3.75ghz with 1.55V, or 3.6ghz with 1.475V, yes it's also a northwood core processor, but it's a nice chip. I use XP90 and 92mm panaflo low, it never went above 48 degree celcius, I live in Canada as well and that's in the summer.
I'm...