How about a bios for REX3 that will allow high (235+) BCLK with high speed qpi (Not slow mode). Of course i'm talking for CPUs that HAVE the high BCLK ability.
Maybe it's something like the S21S bios for Evga E760 classified .

http://ocxtreme.org/forumenus/showthread.php?t=4886
http://www.evga.com/forumsarchive/tm.asp?m=100870603