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Let's put it this way, you have about 125mm total interior width of the case. 65 for the PSU, 20mm for rad, 15mm for fan, you have 25mm (aka 1.25 slots) left. Could you perhaps sacrifice the fan on that side and gain 15mm more space? Sure, but at that point, why go through the trouble of using 2 240mm rads if you're putting only 1 fan and a slim fan at that?