TonyCarter
VALUED CONTRIBUTOR
I don't know what size cooler you can fit in that PCS case, but the simple answer is to fit the biggest Corsair (or other known-brand) AIO cooler you can. A 360mm (3x120mm or H150i in Corsair language)) or larger (3x140mm, H170i) is the preference, but a 240mm (2x120mm, H100i) or 280mm (2x140mm, H115i) may be all that will fit.