Guys one of my Sticks just went dead when under stress test of 12GB in DFI-X58-T3eH8.
RMA'd a new kit with new model # but found out one of then sticks is acting weird.
Test on EVGA P55 FTW Result:
8-8-8-20 2000Mhz 1T 1.65v = Errors @ Test #7,
8-8-8-20 1333Mhz 1T 1.65v = Errors @ Test #7,
8-8-8-20 2000Mhz 1T 1.5v = No Errors,
8-8-8-20 1333Mhz 1T 1.25v = No Errors.
It appears to be bad PCB QC rather than the chip itself. So when checking if your sticks are working properly, check if the PCB can handle that voltage as well...

For my current experiance with this baby,
I've tested 6 sticks and all of them can pass Memtest 86+ @ 1.5vDIMM under 8-8-8-20 1T 2000Mhz.
7-8-7-20 will need more voltage than the origional hypers which is around 1.7~1.72v.
However clocking high to 2200Mhz while lentency remain 8-8-8-20 1T @1.65v is still PI 32M X8 Stable somehow
Judging from it's price it's already performing well and cannot complain anymore...