Looking for advice on overclocking:

Mine is rock-solid at 1000/1000, ideal profile. It starts acting up on 1150, even in default profile, as in, random reboots and SiB suddenly crashing (SiB is pretty much the only app I run overclocked, in order to watch rmvb videos on the TV).

If I try loading the starving profile, even in 1150, video will display artifacts, though it stops crashing at all. Any ideais if there's anything I can do to make the CPU run stable @ 1150?