Yes all the fan sockets use PWM, they are 6 pin sockets but are 4 pin compatible, plenty of spare sockets on the board. Have a good read through the thread re the FRUSTR updates, you need to tell the board which fans you are using otherwise it will set all fans to 100% as a failsafe (very loud!).
The Noctuas look great, although I would say they might be overkill unless you already have them to hand You can't overclock the Xeons and the T4s for me were much cheaper and keep the CPUs plenty cool enough without the fans having to spin up much even under full load all cores.
The Noctuas look great, although I would say they might be overkill unless you already have them to hand You can't overclock the Xeons and the T4s for me were much cheaper and keep the CPUs plenty cool enough without the fans having to spin up much even under full load all cores.