- The NZXT H3 Flow is easy to build in with simplified cable management and tool-less access - It's space for 2 bottom mounted fans to keep your GPU nice and chilly - It comes with a 120 mm fan and there's room for 6 more to get the air moving - The mesh panels are designed to improve air flow and keep dust away from your hardware - You'll have plenty of room - there's space for a 280 mm radiator and a 377 mm GPU