The fan on the L12S pushes almost double the amount of air as that on L9x65, so yeah it may be powerful enough. I tried using the L9x65 fan as exhaust, and flipping the fan around made it louder, almost as if it was vibrating. I removed the fan, still running, and could feel the vibration in my hand.
It seems the fan is not designed to be turned around as exhaust, or putting it another way, the fan is designed to push the air through the heat sink. The L12S flips the entire cooler around to reverse direction.
Anyways, this is what the setup looks like (the perspective is a bit skewed). The PSU fits rather nicely with a few mm clearance between itself and the motherboard. The two noctua fans on the left are pushing out almost twice the amount of air as the cooler fan, so I guess ultimately they're helping suck in air from around the PSU and the cooler.
[MEDIA=imgur]a/63MbcqK[/MEDIA]
I sprayed the fan black to complete the stealth look. Still waiting for the rgb LED strip to arrive. I like the fact that the switch itself blinks to signal sleep mode, but would be even cooler if the RGB leds could be configured to do the same.
