"Over clocked the
cpu by raising voltage to 1.5 "

If you didn't pick up on what these guys have said, 1.5
vcore is way too high for 3.6GHz.
I've read a number of posts that said they got to 3.6GHz at default
vcore or just a little voltage bump up! (under 1.3v on
vcore)
This is way too much voltage for that clock speed..
Here's an example where someone was able to do 3.6GHz with just 1.26250
vcore.
If you do this right, you shouldn't have to "Muscle" the E8400 to higher speeds...
The E8400 is one of the easiest
CPU's you can
OC.