Water cooling systems whether they are a custom loop or an aio all follow the same basic principles.
Liquid cooled cpu fan direction.
Again this can vary in that there are air coolers with fans specifically designed to reduce noise and fan settings or fan selection can impact the amount of noise generated.
The coolant is specially developed to bring the best light dispersion capabilities withing various pc liquid cooling products.
Cpu coolers generally come in two varieties.
Best liquid cpu cooling.
The first is an air cooler which comes with a big metal heat sink and a fan that pulls air away heat from the cpu.
Your typical air cooled pc is packed with case fans graphics card fans and a cpu fan or two positioned atop a big metal heat sink to keep your expensive components nice and frosty.
Overall though liquid cooling tends to generate less.
An interesting test would be to measure the difference that occurs when you reverse the fan direction of such a cooler.
When possible direct cpu cooler output to the nearest exhaust fan.
All fans will be configured to 100 in our testing.
In the very least we can look at liquid cooler placement performance in a few different cases.
Liquid cooling especially when using an all in one aio tends to be quieter than the fan on a cpu heatsink.
If you have a large aftermarket cpu cooler it probably has one or more fans of its own.
This includes measuring how much a front radiator might reduce cpu temperatures at risk of raising gpu temperatures or how a top mount might do the opposite.
A side mounted fan expelling or drawing in air in a direction perpendicular to the motherboard might be useful here but not all cases support that.