Pi Series DDR3 on Sandy Bridge?

[BeepBeep2]

I have a kit of G.Skill Pi Series rated at DDR3-2133 7-10-7-27 but I'm having huge problems with it on Sandy Bridge. It seems I need well over 1.7v to run stock speeds.
On AMD Bulldozer, they are fine. I haven't been able to try P55 unfortunately.

They don't run the XMP profile, is there something I'm missing here?

I also have RipjawsX, rated at DDR3-1600 6-8-6-24, and they are bad on AMD but seem as good as my Pi on SB.

[GSKILL TECH]

The memory chips are not designed for that motherboard, so you may have difficulties reaching the rated specifications. They should work just fine for P55; for SB, a BIOS/EFI update may be necessary.

Thank you
GSKILL TECH