Just bought a gb z77x-d3h from msy.com.au i asked the guy if it supports 1866mhz kingston hyperX ram he said all Z77 boards support 1866mhz ram....
but im looking at the spec and it only goes upto 1600mhz.....http://www.gigabyte.com/products/product-page.aspx?pid=4144#sp
can anyone shed some light on this situation or did this guy just give me a bum steer...
I had the same question. I was thinking of buying some 2 4GB sticks of Crucial memory for this exact motherboard so I emailed Gigabyte and they said, "If the memory isn't listed on the memory support list, then we can't guarantee you, please check memory finder for the "GA-Z77X-D3H" at Crucial website for validated memory."
So I checked Crucial's website and 1866 memory is listed as supported for this motherboard http://www.crucial.com/store/listparts.aspx?model=GA-Z77X-D3H&pl=Giga-Byte&cat=RAM
I don't know if it'll show up in the BIOS as 1866MHz stock or OC from 1600MHz but it seems to be supported so at the very least it should work.