I see a few of you guys are running close to or max of 1.6v cpu vtt. Is that suitable for short benching only?

I'm on the official 13/9 BIOS now but i'm still having trouble getting prime blend stable with my G0 Q6600 over 400x9. It will do small fft all day at that setting. I've spent some time tweaking a few things.. Best i've got to is about 50mins prime blend before failing. I'm lurking everyday at the Tech Repository for FCG/Tony BIOS guide

I stuck a B2 E6300 in and it was good for 480x7 large fft so It has to be an issue with the Quad. with the quad max fsb i've gotten is a 475x6 spi 1m.

Sorry that sounds negative, but actually I love the board. It get on well with my Team Xtreem PC8500 cas4 sticks.