Question What is the best 120mm aio orientation

Aug 27, 2019
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Ok so I have a 120mm aio and I was wondering what it the best orientation for the best cpu temps. I know that pulling in fresh air from outside the case lowers cpu temps but I only have the option to intake from the rear or the top so would one of those options be viable? Also could I have a push pull config even tho the case fan is rated at a lower rpm than the default aio one.
 
Ok so I have a 120mm aio and I was wondering what it the best orientation for the best cpu temps. I know that pulling in fresh air from outside the case lowers cpu temps but I only have the option to intake from the rear or the top so would one of those options be viable? Also could I have a push pull config even tho the case fan is rated at a lower rpm than the default aio one.
What CPU is this for?