PCShopTalk posted a review on the Cooler Master ATCS 840 Full Tower Case

"The place where we install the power supply has ventilation holes in the body of the case, so the power supply sucks the cold air from the bottom of the case and then gets it out through the back of its body. This way, all the air that circulates into and out of the power supply is completely independent from the rest of the case.

Cooler Master ATCS 840 Full Tower Case Review