Hi I have put a systems together using the Asus crosshair V formula z, plugged in is an fx 9590, 2x Samsung pro ssd (raid 0), 32gb Kingston xmp beast 2400mhz oc ddr3, 2x asus 760gtx in sli, quad tv tuner, and a 16 port sas controller, I have a hydro h105, and Loads of fans round the cooler and case. Tryed just going into bios and just setting ratio multiplier to 25 (5ghz), and my memory on the xmp profile listed at 2400mhz, don't know much about custom dimm and cpu settings, thing don't boot, so I'm running my cpu @ 4.8, and my memory @ 1800mhz, I'm not saying its slow, u blink and its done, but I have bought them for what they are black OC editions, id love too run um that way :), id post a pick but my rooms bit messy 🙂