I use a Cooler Master CM 690 II with a 240 mm radiator on top of it. It also has two 120 mm fans on top of it. It has an option to switch the direction of rotation of fans to make it work as an exhaust or intake. In exhaust mode, it blows out the hot air out from the system. In intake mode, it will let in the cold air or gas from a different source to neutralize the temperature of the hot conditions in the system. I wanted to ask if the exhaust mode is better to use or intake mode is good to use. Both of the modes control the temperature of the system, but which one is more reliable and efficient?
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