Quote Originally Posted by fitseries3 View Post
im running crucial ballistix 1600mhz kit 2x1gig's and i cant get anything over 1600mhz to boot to windows no matter what i try. it's not the ram either. i can boot them at ~2100mhz on my p5k3 just fine.
I have the same sticks and they've worked in no board better than they did in the P5K3 (1030MHz 7-7-7 @ 1.90V) so get used to it. In the P5Q3, it takes more voltage and it won't run 1000MHz unless you switch to CAS 8. 7-6-5 is OK til about 980MHz @ 2.10V and 8-6-6 is OK til 1030MHz for me in the P5Q3. BIOS version doesn't seem to make any diff for me.

Different PLs work with different straps/ratios. If you get no POST at all at higher than 1600MHz, set the strap and ratio manually and then try different PLs manually set. I assume you're working at a sane FSB. For anything around 600FSB, I need to keep the mem <1600MHz no matter what, but that's the board, not the mem.