Which AIO do you have? I have the Corsair H115i Pro. I plugged the pump tach (2 wire) into my board's AIO header. (If no AIO header than it would go to CPU fan 1.) I routed the wire below the CPU socket. The USB cable runs up along the VRM's and out the back through the same grommet as the 8 pin CPU connection and then down to the MB USB 2.0 connector. My only complaint so far with this board is only having 1 USB 2.0 header, but I understand that is a function of the chipset and port distribution. The SATA power and fan connector wiring runs up along the RAM slots and out the grommet above the fan controller. From my understanding the USB cable is optional and is there for Corsair's Corsair Link software. Most of the install pictures I see for these coolers have the USB cable run along the bottom edge of the water block and up the right side with the rest of the wiring. I didn't do this because I currently have my rear fan plugged into the Case fan 1 port on the motherboard. (And my OCD says it looks more balanced with wires running up both sides of the water block ). If I were using the fan hub, ran the AIO tach to the CPU Fan 1 port, and routed the USB cable the "normal way" then it would probably look a bit cleaner.