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I dont want to lapped hs cause i heard it voids your warranty and its my first time building a new computer lol but I'm able to hit 3.0 with ultra extreme 120 or tuniq tower under 50 degree on load right?
Warranty on a HS???? Bah, either the heat pipes are good or they aren't; it's just a chunk of metal. You can argue that lapping has nothing to do with the heat pipes should one fail in the future.
The CPU on the other hand... that is more relevant, but I'll argue that as long as you keep your vcore and temps within specs, it will be fine. Try it unlapped for a few weeks, odds are if it isn't DOA, or fails in a few weeks, it'll be fine. Also, overclocking voids your warranty on the CPU.
To your last question: no. Have a look at my system before during and after lapping:
Lapping HS
Lapping Q6600
Here is a graphic from those threads:
As you can see, with both piece "unlapped" my 9x333 temps were in the 60s.