PC unstable... need P7P55D settings for GSKILL F3-10666CL7D-4GBRH

[Jumpem]

Using an Asus P7P55D Pro, i7 860, and GSKILL F3-10666CL7D-4GBRH. No overclocking, intend to run everything at stock speeds.

I originally had 8GB installed, but was having stability issues. I now have only 4GB installed trying to get the system stable. I currently have the settings on auto with Cas 9. I have run memtest for 24 hours without an issue though.

I need recommended settings for 4GB to try first. Thanks.

[Jumpem]

Seriously... almost a day and no responses.

How about some tech support G.Skill forum moderators?

What is a less stressful starting point, everything on Auto with Cas 9; or using XMP which will set it to CAS 7 and fix the voltage at 1.5v?

[GSKILL TECH]

AI Overclock Tuner - Manual
CPU Ratio Setting - 21.0 for 2.79GHz
BCLK Frequency - 133
DRAM Frequency - DDR3-1333MHz

DRAM Voltage - 1.50V

DRAM Timing Control (submenu)
CAS Latency - 7
RAS to CAS Delay - 7
RAS PRE Time - 7
RAS ACT Time - 21

DRAM Timing Mode - 1N
All others can be AUTO

Save and exit.

Thank you
GSKILL SUPPORT

[Jumpem]

Tried these settings and still get hard crashes. The PC goes to a blank screen, and then reboots. No memory dump file is created.