DDR3 RAM and DFI LP DK P-55 T3eh9 cant set 1.35V

[Krewetlki]

Hello,
this is my ram specifications: Ram spec

I can't set 1.35V on RAM Voltage option in bios. There is only option to do 1.3 or 1.4.
Under this option bios have:
DDR3 Terminal Voltage - from +0,15 to -0,6
DDR3 Channel A Adderss VREF- from +0,15 to -0,6
DDR3 Channel A data VREF- from +0,15 to -0,6
CPU Channel A VREF- from +0,15 to -0,6
DDR3 Channel B Adderss VREF- from +0,15 to -0,6
and so on for this and other channels

My 2x2Gb g.skill eco and 2x4Gb ripjaws should be set on 1.35V.
Anyone know how to do it?
For now I use 1.3V and in bios it's 1,294V.
I got factory bios btw, cant seem to find newer.
If anyone can help please do so

 

[Bozywoj]

At least anyone can help with understanding those bios options?
Now I run on xmprofile. Before this my ram run on default settings and 1.5v but I got a lot of bsods and freezes.
Now on 1.3v and xmp windows run smooth but update freezes so it might be still ram issue.