it's a laptop
anyway I spoke too fast in my previous posts, and I spoke too fast twice
don't know what I was thinking of, writing to the persistence cache on or off didn't mean much as the cache was already created from a previous full scan. Anyway there's still a gain between 5 and 15 degrees compared to before (I can tell now because I had to reinstall AIS for other reasons - see posts above), and there's still the possibility to run a full scan without writing data to the persistence cache at all and keep temps really low, which wasn't obvious before either. Again I wouldn't care if it wasn't laptop, as there are so many ways to keep the temps low in a desktop PC (fans, water cooling etc...). I got the full scan running at the moment and on an area where it was showing 85°C it now shows 72°C, so, considering the type of hardware, I'm really satisfied now.
edit: adding...the max temp admitted on quad cores for instance (like a Q6600) is about 70°C. My mobile T3400 (dual-core) has a max temp of 100°C.