wow, google says the max is 90C, after which it bsods. However, for a permanent overclock, you wouldn't EVER want to max that high.
Hmmm, seems to me though if the i7's can withstand such high temps, you should be ok at leaving your current overclock there. Just run prime on it for a few hours, heck if you can leave it running for 8+ hours that's even better.