D'oh, that was close...

Can't you get any more speed on the RAM?
4-4-4-12 on 1:1 divider?
5-5-5-15 on 5:6 divider?
5-4-4-15 35 at your current settings?
I'm sure the Quad is killing the NB but the last suggestion should be possible?!

For 1M you need to run CDT IV, did you do that?

You'll have PM in a minute!