First off, turn TURBO Core to OFF in the BIOS - You don't want that ON/AUTO when overclocking.
You should really follow my instructions for overclocking from the ground up...
I'm not sure if you're having a lack of understanding of my instructions, if it's laziness, or what it is but I can tell that you're basically not wanting to take the time and the patience to really tweak your system properly. Honestly it's easier and less stressful to OC if you just go about it the "Hard Way" because that's actually EASIER.
Read the post on that page that I already wrote on overclocking a Phenom II. It is pretty detailed and should get you much better results than this guessing and hoping for stability game that you're playing.
Get out a notebook, take a few hours, and try that method. You will likely achieve:
CPU = 4000MHz @ 1.34375 vCore
MULTI = 16.0x
NB = 3000MHz CPU/NB @ 1.28125 V
RAM = 1666MHz @ 1.55 V
FSB = 250 @ NB = 1.15 V
HT = 2000MHz
with hardly any trouble at all...
As you can see, there is no need to run a mutli of 17.0x for even a 4150MHz clock, let along 4000MHz. If a multi of 17 isn't working for you, however, its likely just because your CPU needs some more voltage to be stable at that speed and not for any other reason - more than likely.