I have a single loop now on my overclocked i7 and want to add the 7970 in the mix. I only have a dual 120mm RAD right now and am wondering if a second dual 120mm RAD is needed or if im fine with the one. The pump im running is an xspc pump and resivor combo. The i7-920 is overclocked to 4.5ghz and i wont be doing any crazy overclocking to the 7970. I could have room for a triple Rad and double if i move some things around and lose a dvd rom but owuld like to keep it. This will be done in a NZXT Phantom case so the drive bays are removable and i only have a few SSD's and one 3.5 drive which i can relocate some how. Any advice would be much appreciated.