Already built my PC but noticed I have my top fans above the AIO radiator in a pull configuration. Since heat rises, my gut tells me it may be slightly better to have them below the radiator pushing the heat(already closer to the open top) out of the case. Significant enough to go in and change it?
Push or pull is fine, either way. When in doubt, you set the fans to push on a radiator. Just make sure that the screws are in the right order, since you can puncture the fins/channels on a radiator using long screws in the wrong side of the radiator.
Make and model of the radiator + fans and the case used for the build?