The chart above has been updated with a run while setting memory to 600 MHz (400 MHz BIOS * 1.50) with the 1066 strap, instead of the 800. Lower wouldn't do, I don't get a post at 333 MHz * 1.50.

As you can see, going down from 800 to 600 MHz makes few difference unless you do low-quality video.

Should do a run with some other timings and same frequency.