Convection of "heat rising" is so easily overcome by the weakest radiator fans sucking in cold air.
For God's sake people, it only takes a few minutes to change a fan's direction, please experiment both ways and determine what works best for your rig.
As coolmeister said, too many variables and to each his own.
This is suppose to be a hobby and experimenting should be part of the fun instead of posting for advice.
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