Well two things, most importantly with this slot cooler exhausting air, an intake of fresh cool air is very important. Case temp drops with an intake fan somewhere in the case, it's as simple as that. Secondly, in our tests, we found that the position the slot fan was in had an affect on its ability to cool the BGA chipset. The result being, the best possible position to have the slot fan occupy is one slot away from the AGP card. That extra bit of room seemed to help airflow, and in our test system kept the case a mear 5 degrees warmer then room temp. That's a little bit more then a 10 (C) drop in case temp. Definitely well worth it for that alone.

The Super Duper Slot Fan's affect on BGA chipsets - the heart of any video card - was less dramatic, in our tests the best temp improvement was about 4 degrees. However, when you consider the Super Duper Slot Fan's ability to pull down case temp, and keep it down, the fringe benefits on the AGP cooling make it pretty worth while. That, and if you think of it as a case fan, it's damn quiet!