most mb vendors no3w only take a small sampling of vendor rams. most list are months old and incomplete. also to the fact that memory vendors change model numbers like candy. a good rule with memory is if the chipset that your using now the z77 if it just a small changes from x68 then most memory listed for the x68 will work fine. the only real change from the x68 to the z77 in that the z77 had the usb 3.0 built into the chipset. on looking at the x68 version of your mb they say that the ram should work in that mb. the problem is that list is almost a year old and the (q) line of your ram not listed but earlier version of the same ram are.