Ok in my case sometimes I run an AIO (280 front mounted intake set to pull to be precise)
and other times as documented below I run an air cooler.
When I use the AIO I have my top fans set to exhaust, since a lot of the air that comes in from the rad isn't that cool now, better to just get it out, using fan curves to make sure the pressure isn't negative.
However, when I have the air cooler installed I like to set my top fans to intake. And the reason for this is, I see the AIO a little bit as a mid exhaust fan, so any heat that does come off the GPU will just get soaked up by the AIO
Setting the fans to intake (I like to have one inline with the cooler and one in front) I feel just helps keep the VRM and ram cool aswell.
Anyone else use this theory or am I just speaking waffle?