it is official asus p6t series will have all the cpu ratio at 21x and 23x for i7 920 and i7 940!!!!!
this is the new bios released for asus p6t ws revolution look what they wrote great!!!!!!

P6T6 WS Revolution BIOS 0407 - 2009/03/16 update
1. Updated CPU micro code(s):
* M03106A5_0000000F - Intel Nehalem-EP D-0 Nehalem-WS 1S D-0 Bloomfield D-0
* M03106A4_0000000F - Intel Nehalem-EP C-0 Bloomfield C-0
2. Support i920 CPU ratio up to 21 and i940 up to 23 in BIOS setup.