this is specially useful in a case where you have a GPU with non reference aftermarket cooler because they dump much more heat inside the case. for a better cooling environment inside your case, because you will be helping to have a pretty directly front to rear and top airflow and you are avoiding more dust inside the case, you will draw part of the heat generated by the GPU but this can be really compensated by having a side panel fan as intake (specially those that have several side panel mounts, or a big one) because the radiator will still receive fresh air. what its the recommended setup for rear mounted radiator? not matter if using one or two fans its better to setup as exhaust, you will sacrifice 2 or 3 degrees(up to 5 degrees depending on case, and gpu setup). If you set the fan(or fans) as intake, the radiator will always receive cool air, that will be directly translated into a better CPU cooling efficiency but the hot air produced by the radiator will be directly launched to the motherboard, RAM and part of the GPU, making a hit in the cooling of those components, so you will need top mounted fans to compensate a bit that hot air and draw fast out of the case, but this have also another negative point, and its the biggest enemy of any electronic hardware and its the dust, if you setup the fans as intake then you will throw large amount of dust directly to the motherboard and RAM and you will not like that scenario.
CORSAIR FAN AIRFLOW DIRECTION FULL
you have two options there and depending on your case you can toy with it for a full CPU cooling performance or a more balanced environment which also depend on the type of the GPU you have. If you have a h70, h80, h90, depending on your case you can also play with the position of the cooler, the preferred mounting for those coolers its the Rear Fan mount. or of course a more balanced airflow to benefit the whole system. but this its only according to the traditional front to rear airflow, if you have a big case with tons of possibilities with the fans setup you can toy a bit with the airflow, you have to take into consideration some things like positive pressure or negative pressure and of course the most important cooling preference, if you want the best cooling performance for the CPU, the GPU or the rest of the components as the motherboard, RAM, Drives, etc. Its always good to have the fans in the radiator as exhaust, if you are using only 1 fan configuration then push its better for cooling performance because will keep the fins on the radiator cooler than just draw the hot air in a pull setup.
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