Quote Originally Posted by eva2000 View Post
could be the 1st rev of boards limiting ? remember Q6600 and early 965P boards having issues above 350-400FSB ? Then came new revs and then P35/X38/X48/P45 now handling Q6600 up to 500+ FSB ?
Or maybe, that happened because first batches of Q6600 (like B3 stepping) had issues ? What I imply with that, is that maybe it's happening because of the CPUs just like Fr3ak said ...

BTW, nice chip Brian y.