i want to oc using stock cooler to reach 3.6ghz no more...
(e8400  p31-ds3l)
idle temp 42~45
stress temp  69~71
can i???

Uh...No?
 
Get a better cooler, like the Xigmatek: http://www.frostytech.com/top5heatsinks.cfm
 
You stock temps should be well below 60C before you can start OCing above stock speed. Keep your temps below 70C at any time.

sorry...
those r my ocing temps (3.6ghz)
my normal ones  33~34 idle
stress  55~56

The best cooler would be this badboy.
 
http://www.zipzoomfly.com/jsp/Prod [...] ail=040108

Yeah, its very efficient. Saves on both power and heat!
 
I think I am gonna order one to replace my old weak TRUE.
 
Thanks, Bildo!
 
--Lupi!