you might want to "relax" the timings a bit, make sure you dont get any errors from lower timings, try starting at 6-6-6-16. Remember, you want to isolate the problem, by doing this you decrease the chance of your ram being the culprit. Also, if you have a FSB voltage you might want to increase that by .1 or .2 volts. I had this same problem when oc my c2d until i read an article that talked about FSB voltages. (i used to be an AMD person) Also, if you have any virtualization or speedstepping turned on you need to turn those off. As far as the ram goes, your ram OC itself when you OC the cpu, you might have to use a ram divider to increase stability. OC a c2d even a little bit will OC your ram to speeds much greater than it normally runs at. If you dont mind OC your ram try to keep it no higher than 1000mhz by using a divider and upping the ram voltage by at least .15 v. Your processor voltage should be increased by about .1 v every 400 mhz. (this is all general so it may differ in your case.) try all of these separate from each other. Isolation is key to troubleshooting hardware problems.