Are there any secrets to squeezing a few more MHz of FSB out of this board?

I've topped mine out at around 525x7. I can still make it into windows at 532x7, but I get a hard lock very quickly. BTW, I doubt I've hit the FSB wall of the e6300. I'm running at 1.50V to get 3675MHz.

I'd really like to get 529x7 as my everyday clock, but its not going to happen unless I can figure out how to increase the stability of the board. I think I may try improving the NB cooling and add some mosfet sinks to see if that helps things.