i have a H100i and first has fans as exhausts and back fan was also exhaust but floor fan and front was intake but the temps were still between 50-60 without any overclocking. i have Gigabyte sumo Alpha case so it has a steel mesh on side panel. My all fans all means all back front top and bottom are now intakes and only 12x10 inch side mesh is exhaust No exhaust fan is there.
and temps are 25-35 now.
This just crap man that hot air always go up so you have to put fan as exhaust up there.
1. case is close so when for example 2000 rpm fans 2x120mm in my case pulling cooler heaver air in back also 2000 rmp pulling in fron and floor fan also puling in then tell me how lighter hot air will go up or on any side?
2. when all fans are pulling cooler air in then where is the the chance to allow components producing hot air when your system is already a freezer?
3. CPU is the main thing inside a case generating heat your water or liquid pump is on top of it your rad it exchanging heat then how your cup is spreading heat inside the case?
4.when heavy air is all around in the case lighter air will be exhausted from any vent it found. You can build your one air flow from where to in where to out even you can make a vent by removing PCI slot covers.
5. This is very old school thought that hot air have to go up. computer case is very small place make your own flow if you you have a side mesh or side panel fan mounts open with out fans just pull in from all the sides hot air will be exhausted from mesh and remove pci slot covers.
do this and your system will thank you.
6. if you don't have any vent from side or don't have mesh then just make your back fan or floor fan as exhaust and all others intakes.
you will see then difference.
(I'm a Jet Aeronautical Engineer so i know about air pressures very well inside a compound or in outer air and fans intakes and afterburners (exhausts) coz i play with air all the day