Thank you for the replies. I tried each stick on its own in each slot, no go. I will check the nb voltage, not sure what it is now since I set it at stock (on my oc setting it was 1.55v), but I do have all four sticks of patriot in now. I have these: ozc and patriot. I did set the ram to its correct voltages. I can't even get the ocz to run at 800 (or anything for that matter) and anything over that is a crash for the patriot.