Rampage IV Formula + Gskill XMP Problem

[Fong]

Hi,

I've just built my first intel system using the RIVF and F3-1866CQF-16GAB from G Skill. This memory kit is rated at 1866 9-10-9 1.5v. I noticed that with everything on auto, it will run at 1600 cl11. However, if I switch to XMP, I will start to get errors when I run LinX at around the 3rd run. Everything else is stock. I have tried setting rampage tweak to mode 1 and vccsa to 1.25v as per G Skill's instructions for the RIVE (even though I own the RIVF) but I still get errors when I run LinX. What can I do? BIOS is also updated to the latest.

Thanks

[Fong]

HiVizMan wrote:
If you have passed two cycles of memtest at the XMP profile then you can safely assume that your ram is stable at XMP.

I have ran memtest for 2 passes with no errors. Here is a summary of my results so far:

1. If I set everything on auto, memory will run at 1600mhz cl11 1.65v. LinX will run with no errors (left it running for an hour).
2. If I load XMP (1866mhz, cl9, 1.5v), VCCSA 1.25v and mode 1, LinX will fail at after 10-20min. I noticed that loading XMP automatically changes the turbo mode so that turbo is 3.8ghz even when all cores are loaded. I've tried setting it back to 3.5ghz but LinX still does not run without errors.
3. Ran Memtest for 2 passes without errors at XMP.

CPU is stock. What should I do?