I wonder how this is triggered persay. I had mine up to 105 before I delid' and it didn't throttle. Course that was right around the time I realized just how awful the IHS was and how necessary a delid was =p
Now mine runs at 85 under load.. but that's IBT load. I don't think anything gets your chip hotter =P That's at 1.5v and 4.9core/4.7uncore. I don't mind because apart from synthetic load, it runs very cool. Its great for gaug'ing ultimate stability but ive ran every chip I have ever owned between 1.4 and 1.5 and have yet to have one go on me. My Q6600 ran at 1.45/3.6 for like 7 years and is still kosher =P
like anything YMMW but ultimately how many people do you really see posting they killed their chips? Use some common sense and don't get too crazy and unless you plan on running a vintage machine, im pretty sure you can get away with quite a bit.