*Not compatible with 1/2" compression fittings.* *Fits Nvidia Geforce Reference Designs GTX680, GTX580, GTX480, GTX470, GTX460, GTX285, GTX280, GTX275, GTX260, GTS250, 9800GT, 9600GT, 8800GTX, 8800GTS, 8800GT* *Fits ATI/AMD Radeon Reference Designs6970, 6950, 6870, 6850, 5870, 5850, 5830, 5770, 5750, 5670, 5570, 5550, 4890, 4870, 4850, 4670, 3870, 3850, 2900, 1900* *Please verify that your video card is a reference design before purchasing and that it will fit your model of video card. NO RETURNS DUE TO INCOMPATIBILITY WILL BE ACCEPTED.*