XMP 1.3 or 1.2

[stavros58]

Hi im slightly confused that since I have installed a further 8 gig of ram in my machine now making it up to 16 gig Corsair Vengeance 8GB (4x4GB) DDR3 1866 Mhz, that when I check them in the Bios system Browser on an AsRock Z77 Extreme6 Motherboard (Socket 1155, Intel Z77) That the browser shows 2 of the slots at XMP1.3 and the other 2 slots as XMP1.2. It makes no difference to the information displayed whether I change the XMP setting to Auto or 1.3. XMP1.2 is not a manual option. All of the ram is recently purchased within the last 2 weeks although all four sticks are not matched they are identical and I have checked them with Mem test and Prime 95. I have had no errors or crashes or any type of problem that I can see I would just like to understand why the slots are displaying their XMP status differently and if I should set XMP to Auto or 1.3.

 

[Tradesman1]

They read the XMP info from the SPD of the sticks themselves so whatever (1.2 or 1.3) profiles are programmed into the SPD is what will show

 

[stavros58]

So can you run 1.2 and 1.3 together without problems? and what happens do they both run at 1.2?