Finally I suggest everyone to reseat their NB-SB heatsink city and put some good thermal grease on the chips. And then tighten the screws better than they were out of the box.
see guide here :
http://vip.asus.com/forum/view.aspx?...Language=en-us
Caution : Don't overtighten, I ended up having to replace the screws with metal nuts and bolts, using these can be even more dangerous if you overtighten and crush your chips.
However I got nice results :
Even tho there were some sort of thermal pads on the chips ( some people say the didnt even have those out of the box ), I used to get temps of 71c on the NB @ 1,56v and 72c on the SB @ 1,50v
When I cranked the NB up to 1,60v my system regularly shut itself down ( don't even wanna guess what my temps where at that time :p )
After the reseating and using the good thermal grease my temps went down to 62c and 65c, for me that was very nice. Perhaps some thicker thermal paste would have been even better, or I may have been able to tighten the metal nuts and bolts even more, but I was scared I would crush the chips and I thought the Zalman thermal grease was better then the Arctic Silver 3 I had lying around, plus the Zalman comes with a brush, which is really handy for the mosfets :p
However I was not sattisfied yet, and got me 2 Antec spotcool fans, now I find these thing very nice and easy to install, I pointed them at the NB and SB and the temps dropped to 57c for the NB and 56c for the SB
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