The motherboard chosen to test the heatsink on is the DFI 680I LT. This motherboard comes equipped with a Northbridge heatsink that is fairly large. Thus, mounting the Nirvana with the fan facing downward is impossible without modifying either, so the heatsink will be facing up along with the comparison heatsink, which will be the Tunic Tower.

http://www.overclockersclub.com/revi...irvana_review/