OK, thank you for your answer.

No, only 3 pins fans.

Hello, I received the octo device today, plugged it to the motherboard via the USB cable, updated the Aquasuite software to the latest release (X.3, updated the Octo firmware (1014), plugged 5 fans (2 Antec 80 mm, 2 Antec 120 mm, 1 Silverstone 140 mm) to different plugs. All the fans have a switch to choose between 2 or 3 speeds. I have an Aquaero 6 LT too, connected to the motherboard via a USB cable. The problem : I cannot change the fans speeds, either they are at 0 rpm or at the maximum rpm....