Thanks for getting back to me Jim. Unfortunately my BIOS will not let me turn down the memory to 1333. It won't budge.
The only way my PC is stable is to leave it on 24/7. Less than optimal.
Even if I put it to sleep, upon recovery with not doing anything I get a complete lockup, where the computer is completely non-responsive to everything. The only way to recover is to power cycle the unit.
So obviously something is unstable. And for the record I've already replaced the memory.
When my computer is on, it's normal. It does not like powering down at all.
Very frustrating.