According to the link you gave, your RAM is showing up as KHX3200C18D4/8G, which is not on their list, although I'm not sure if they're exactly the same RAM stick or not. The pictures look the same, but HX432C18FB2/8 does not show up on most benchmark sites, so I don't know if that's just what Kingston calls it, or if they're basically the same stick but came out at different times with different labels or what.
Also make sure in the BIOS that the motherboard is auto-detecting the RAM voltage as 1.2, and not 1.35.