Graphics card lock up?

These cards typically support Quad Buffered Stereo although not all of them support a 3-pin connector for connecting to the glasses, in which case 'blue-line' stereo can be use. Another common feature of the later cards is Dual-Link DVI ports which are needed for very high resolution DVI LCDs such as the 30" Apple Cinema Display, Dell 3007WFP 30" display or the IBM T220/T221 displays (which requires 2 Dual-Link DVI connections).