I'm using the Asrock Z77 Extreme6 and with this memory set to the XMP profile my system will not boot. Once the motherboards Boot Guard is initiated it only shows the memory at PC3 10600 1333Mhz, even if i change the timings to the tested 9-10-9-27 1866Mhz my system does not boot. I get all sorts of Dr.debug codes and i blank screen, Not sure if the cards are defective or my motherboard doesn't like them. Right now i'm using Vengeance LP 1600mhz 9-9-9-24 and my system as no problem with running with the set XMP profile. I was told on another forum that the motherboard doesn't support the Dominator cards i have, but my Vengeance cards aren't on the list either. Any thought?
In the XMP profile I seem to remember that there can be profile one and two so when you select the XMP do you see that or isthere the just the profile one.
You should download and run memtest86 to verify that the ram is not defective so that if it is you can RMA it and get a good working set.
What did you get for a set of the Platinum how many GB and how many sticks and was the memory dual channel or quad channel.
I think at this point you have a few choices, depending on when you purchased the ram and the motherboard you can RMS either one. Maybe the motherboard is defective and the only way to find out is if your still in the 30 days from purchase you can RMS the ram and see if the new set will run at the rated speed and that will tell you if it could be the motherboard.
You can run the ram at 1800 and call it a day or you can wait and see if someone else posts a reply and has a better solution.
If you have a friend or someone that has a motherboard that enables the XMP profile you could try that and that would help narrow it down.