I want to put a liquid cpu cooler into my computer, however, I have an issue. The liquid cooling fan I want to get requires a 120mm space for the fan. My case can only fit a 92mm. If I drill holes into my tower to fit the fan, some of the case wall will be blocking the fan. I am worried that hot air the fan is trying to release out of my case will circulate in my tower due to this small blockage. Is this an issue?