I dunno. I'm running 515Mhz FSB on mine with only 1.4v NB and stock SB and the NB and the rest of the heatpipe assembly don't hardly get more than warm. I don't even have direct cooling on the NB sink at the moment since I took out that extra 120mm fan I had mounted above my video card. Right now I just have a rear 120mm exhaust and two 120mm fans blowing down over the motherboard. My NB temp right now running small fft's is only 28C. Jumps up to low to mid 30's on large fft's.
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