I am using a q6600 oc'd to 3GHz(333*9) with a p6nsli platinum motherboard.

Currently i am using stock voltages for every options except FSB VTT & NB. my FSB VTT is 8% increased and my NB voltage is at 1.25(everest) and my system is stable.

1.is that FSB VTT voltage too high? (my motherboard doesnt show the stock vtt voltage. )
2.Should i increse the vocre voltage? (vcore is at stock setting)

First you should download the following: CPUz, its for checking alot, but mostly real time voltage to the cores. Core Temp, this will list the core temps, and show us a powerful tool for OCing. Your VID, list this value here when you get the programs. HWMonitor, this will show lots of stuff! other voltages, etc... its one of the better tools! Then get Prime95, the newest versions for your OS, its for testing.

VTT stock is 1.2000 for 65 NM chips like yours. It's not necessary to change this value unless it doesnt work when at 1.2000. This modifies the threshold and other values that your processor uses to determine what type of output to spit. It also can over volt your processor if your VTT is over VCore. It's best to leave it be unless you HAVE to change it.

The North Bridge will need to be raised when you start to go over 350 FSBish, to maybe 1.32, then around 1.40 will net you 400 and higher. Your quad is good for 3.6, so you'll get there.

You need a testers tool before you decide if you need more VCore, but if its on Auto, its already raised...

--Lupi