Yeah, they're pretty stock. I OC once in a while if bored, but the small real-world difference and me running all my equipment 24/7 doesn't make the instability worth it.
Main rig doubles as server most of the time.
I assume that P67 is rev2? Cougar Point had a sata bug that caused all kinds of weirdness until intel did a recall and replaced them all with rev2.
In partucular, the bug would cause crc errors on the intel sata ports. No data corruption due to error correction, but it caused all kinds of crashes and hangups.