A Question while Reading Intel's Docs

The Sandy bridge chips only natively support 1066 & 1333 DDR3 memory but most P67 motherboards allow you to use higher speed memory. So look what the motherboard supports not the processor.
 
The number after the DDR3- already has the doubling included, so no it doesnt support 2133MHz natively, you would need to OC it pretty heavily to get it to that and with the new BCLK being tied to everything else and very restricted in its OC ability i dont think its possible.