About two years ago when I was video card shopping, the most important specs were a card's number of processing Pipelines, the number of Vertex shaders, and the speeds of the core and the RAM. What specs are important on a video card? What's a ROP? In the past, you could generally look at the number of pipelines (ie, 8, 12, 16) and use that to separate cards into power groups. Is there anything equivalent to that today?