my case is built for 120mm fans but a friend gave me h110 water cooler with 140mm fans will the 120mm holes allow enough airflow to cool the cpu effectivly? the center of fans wont be in center of holes
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Can you even mount the H110 if your case only supports 120mm fans?
i would have to make new screw holes but yes there is plenty of room in the box
In that case, why not drill some more holes for airflow while you are on it?
But to answer your question: Will it influence your cooling performance? Probably. Will it be more than a few degrees? Probably not.