I have each rad in a push/pull config. I had to mod the cable management bar with a dremel to get them to fit in the front and then I had to reposition the top fan and rad combo to be closer to the glass panel so that they wouldn't hit the vrm. For the gpu rads I'm using the stock evga fans combined with the HD120s and on the H100i im using the stock SP120 fans combined with the HD120s. This used to only have 1 GPU but I got a great deal on the 2nd that I couldn't pass up on and I didn't feel like buying a new case to accommodate the extra hardware so I think I've got as much packed into this case as possible now. I overclocked the 6700K at 4.7ghz and 2 1080 TI's at 2050mhz