According to the description, a 240 WaKü is basically possible, but you must pay attention to the height of the radiator and the fan. 5 cm is probably the maximum. Unfortunately, I bought a be quiet! Dark Rock TF for the set, which definitely doesn't fit. It bends the GraKa and the inner RAM bar outwards. So I had to buy a new one. The new one is a NZXT Kraken M22 120 WaKü. This should fit in, but was unfortunately not on offer at Digitec. :-(