Asus P6T-Deluxe V2 Random Detects RAM

[hunter32]

Hi everyone,
I've got this system configuration:
- CPU Intel Core i7 920
- RAM 2xCorsair CMX2GX3M1A1333C9DHX + 1xCorsair CMX2GX3M1A1333C9 (all 2GB 1333 MHz) recognized in triple channel
- Cooler Master Silent Pro Hybrid 850W
- UPS APC BACK-UPS 1100VA

Yesterday I've added 3xCorsair CMX4GX3M1A1333C9 (all 4GB 1333 MHz), i've tested all 18GB with the last version of Memtest86+ (all steps) and all goes well with all BIOS settings set to auto except the DRAM frequency forced to 1333 MHz.
Restarted the system and when the OS is loading a blue screen of death appears, after that, the total amount of RAM recognized by the BIOS decreases at every system restart to 12, 10 and, at last, 6.
When I disconnect the system power totally and reconnect it the story is the same (18 > BSOD > 12 > 10 > 6).

I've cleaned all slots with air compressed.
I've moved the 3x4GB slots to the orange and the 3x2GB to the black one.
I've tried to force BIOS settings related to CAS latency, VDimm/QPI voltages. I'm not an expert of that settings, somebody may suggest some voltages for my configuration?


Any help will be appreciated...

 

[Tradesman1]

Try setting the sticks at 1333 timings at 9-9-9-27 2T, DRAM voltage to 1.6 and raise the qpi/VTT voltage up + 0.06 from it's current setting

 

[hunter32]

Try setting the sticks at 1333 timings at 9-9-9-27 2T, DRAM voltage to 1.6 and raise the qpi/VTT voltage up + 0.06 from it's current setting

Thanks for the help, I'll try it as soon as possible.
I can't do it now because one of latest Corsair CMX4GX3M1A1333C9 bought has a problem that Memtest86+ V5.01 can't see (a bug!?), but Memtest86 (without the plus sign) has found.
Now I've left the 14GB on board forced to 1066MHz and the UCLK to 2133MHz with the CMX2GX3M1A1333C9 mounted on the same colour (orange) of the 2xCMX4GX3M1A1333C9 and, for now, all is good.

EDIT: solved with the new good CMX4GX3M1A1333C9, disposition as described above, RAM Freq. 1333MHz and UCLK to 2666MHz

Thanks for the help.