Doesn't sound like the g33 platform will support 533 much. It looks like the straps are designed to accomodate 667 at the lowest part. So if you have a 333strap cpu, the 1:1 divider may be available.

If someone is able to program strap selection, then we would be able to set 333strap and then choose 667 for ram, for effective 1:1.