You'll never get far mistreating D9s like that. Not many D9s responded well to very tight timings. If you want max frequencies at set timings you need to make your bases 3-3-3-12/15/18, 4-4-4-12/15/18, 5-5-5-12/15/18. Above 2.5v without proper cooling you will just blow the sticks up. When I done some stuff for Mushkin I done exactly that with a PC8000 Redline kit