I've done much investigating with this board and Quads. As it's a 975x mobo the FSB wall is generally between 340 - 360 depending on luck.
I can run my Q6600 G0 at 355 X 9 max but it causes the onboard audio to freak out from time to time- causing a horrible high pitch whine.
It should definitely run 333 x 9 completely stable.
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