OCZ3X1333LV6GK with EVGA SLI LE @ 1333MHz

CPU: i7 920 D0
RAM: OCZ3X1333LV6GK
MB: EVGA SLI LE

All the following readings are from BIOS

EVGA VDroop Control: With VDroop
CPU VCore: 1.2v
CPU VTT Volt: 1.35v
CPU PLL VCore: AUTO (1.8v)
DIMM Volt: 1.60
The rest is set to "AUTO"

CPU Clock Ratio: x20
CPU Host Freq: 167MHz
RAM Freq: 1333
tCL: 7
tRCD 7
tRP: 7
tRAS: 15
tRFC: 48
CR: 1T

However, I could not make it work with 6-6-5-12 (the rest is auto) http://www.tomshardware.com/reviews/...58,2372-6.html, I tried CPU VTT Volt from 1.4v~1.65v (any higher is colored in red in the BIOS, where I try to avoid), DIMM Volt 1.65v, CPU PLL 1.88v, QPI PLL 1.2v (default is 1.1v)~

As you can see, I'm not focusing on the CPU overclock, but rather on the tight timing of the DDR3. Is there anyone achieve the similar timing? If so, would you share with me how you approach? and/or the settings?

appreciate,