Hi, I have the sabertooth p67 and the fto2. They look DAMN SEXY together , I can tell you that much(especially with nice black cabling)! Im using the nocuta nh-u12p se2, which isn't a top down cooler... so i bought a 50mm assist fan, just waiting for it to come in the mail. Like you, i was thinking maybe the fto2 would provide enough cooling, but i decided to get the assist just in case. I overclocked my 2600k to 4.5ghz simply by changing the multiplier and leaving the rest auto(except i set the BKL to stay at 100). The voltage jumps around from 1.288 to 1.31 when its running @ 4.5 and the temps are around 60-70's(ambient temp jumps around alot in my room, old house with little insulation and forced air heating in the middle of winter). I was wondering if 70C(+/- a few) is too hot to run for a 24/7 oc? If i take it down to 4.3ghz the voltage stays sub 1.288 and the temps stay in the 60's, would that be a better idea? I don't plan on trying to take it to higher overclocks and i'd like to leave on the turbo/underclock stuff for power saving/efficiency sake.