its not really a question we could answer... only one that can find out is you, as all ram is different. do i expect your ram to oc to 1800? probably not with voltages within the intel 1.65v limit. i7 has boatloads of bandwidth even at 1066, so 1440 is more than enough. you could tighten the latencies down to cas 8 if you're running 1440, that would probably have a higher shot of success than 1800mhz.