Flanno

Indeed, 4 fans. I just connect the 2 stock ones. I also use a pwm splitter to connect to akasa viper fans to the cpu header to cool the rad on the H70. I have the same issue with the cable being too short. You can buy a usb 3.0 extension cable though so there's an idea. Personally I connect my usb 3.0 backup drive from the back of my case anyway.

If you take the back of the case off, you will see 4 thin cables with 3pins at each end and 1 4pin molex cable. These are fan extension cables already and a power cable already hooked up to the fan controller. So you simply plug a 3pin fan cable into these extensions. Note, on my fan extension cables there is a tiny plastic jumper on each end to protect the pins. You simply remove this. For the power you simply plug a 4pin molex into the 4pin cable. If you only have fans which have 4pin molex connectors then you will need to buy a 4pin to 3pin adaptor. Also the fan controller adjusts all fans at the same time. There is no way to individually select fans for control. Regarding routing the usb 3.0 cable, you do it either through the watercooling holes or if you have a free pci slot, remove the default vented pci plate and install the special one included with the case which has a cutout for the usb 3 cable. Try and mount this pci slot as near as possible to your usb 3.0 port that your going to plug the cable into, so that when the cable snakes out the back it doesn't have far to travel. Ideally if you could run the usb 3.0 cable along the bottom of the motherboard would be the tidiest. I found I couldn't do this as I have a rampage III board with the usb 3 connection very high up, and I only have no spare pci slots near that position. Overclock3d.net caught this issue and said Corsair should have designed a little rubber grommet into the side of the case so you could route the usb 3 cable behind the motherboard tray and out the side near the i/o shield where your usb 3 connection would be on your motherboard. Regarding the usb cable and hd audio cable, your motherboard manual should be able to tell you where the usb connectors are. Generally they are on the bottom of the board once you have the board installed in the case. You should be able to route the cable the same way you route the connectors for power, reset etc.. Same with hd audio which is in roughly the same location. Alot of board support AC97 and HDAudio so make sure you select the right connector. You manual will have all the details.