Hole pitch: 80mm, 55mm, 53mm, 43mm; Suitable for most graphics cards: 43mm: NVIDIA Geforce4 Ti4 series, NVIDIA Geforce FX5700�Uitra)series, NVIDIA Geforce 6600 series, ATI Radeon 2400 series, ATI Radeon 2600 series; 53mm: NVIDIA Geforce 8400 series, NVIDIA Geforce 8500 series, NVIDIA Geforce 8600GT ATI Radeon 2400 series, ATI Radeon 2600 series; 55mm: NVIDIA Geforce4 MX series, NVIDIA Geforce FX5200 NVIDIA Geforce FX5500 NVIDIA Geforce FX5600�FX5700) NVIDIA Geforce 6600 series (except for 6600AGP series), ATI X1600 series, ATI X1300 series, ATI Radeon 9*** series (except for 9550 / 9600), ATI Radeon X*** series; 80mm: NVIDIA Geforce 7400 series, NVIDIA Geforce 7600 series.