Problems with cpu oc when adjusting ram

[sjulven]

Hello. sorry I don't know if this is posted correctly.

Nevertheless my problem is that I have oc'd my i7-3820 cpu to 4.75 ghz which is stable, but as soon as I switch my ram (corsair vengeance 16gb 1600mhz) from 1'333 to 1'600 in the bios the system gets unstable

Can someone give me some clever input on this, the ram is rated at 1'600 by the manufacturer so I can't see what the problem is and I don't feel like investigating everything on the web to find the cause So I ask you guys =)

When I set the ram to 1'600 with the cpu @ 4.3 the system is stable to btw. I'm do not have enough knowledge to understand the relationship between the ram and cpu when it comes to oc'ing

[TiN]

What board, and what are your settings?

[sjulven]

x79 sabertooth.
and which settings do you need to know?

[TiN]

All settings you have there It's hard to guess what is not set right without knowing what was already done. And I'm not familiar with your board to tell exact root cause right away .

[Morg.]

Are you sure you are using the XMP and not just changing the RAM multiplier ?

[sjulven]

sry for the slow come-back, been very busy with exams.
I print screened the bios so you could see, have not changed much, and I'm currently running at 1333 ram, whenever I change it to 1666 like here system crashes :P
http://imageshack.us/photo/my-images...508192648.png/
http://imageshack.us/photo/my-images...508192706.png/

Got the cpu stable @ 4,875 too, which gave me a nice cinebench score
I may be as much for u guys, but for me being a n00b and all I think it's pretty decent ^^
http://imageshack.us/photo/my-images/713/cpu4875.jpg/