Lapped my X3350 today; first time I've done it. Put everything back together and it refuses to boot. Clear CMOS. Still refuses to boot. Opened her up again, air dusted the socket, gave the CPU a good scrub with TIM remover and dusted it, and hey presto, it works again. Guess there must have been some copper dust in the socket or something.
Anyways, no idea if the temps are better, think load might be about 5c cooler, but this CPU is weird anyway.