I know I'm a bit late to the party but I have a REX now as well.
First kit I'm testing is the blue Cellshock DDR3-1866 CL8 with D9JNL chips, it's the same kit
CryptiK is using.
This is the highest 32M-stable speed I managed on CL7-7-7-14 1T, VDIMM is 2.04V:
http://img594.imageshack.us/my.php?i...dr31920cl7.jpg
http://img594.imageshack.us/img594/3...dr31920cl7.jpg
Now I'm working on CL8-8-8-24 1T, but I can't even get it 32M-stable at 1000MHz with 1.90V, with the same subtimings CryptiK is using. Even on 2T with even more relaxed subtimings it's impossible.
The specific DRAM skews that worked well at CL7 don't work at CL8.
What's your secret? :D