I have a MacPro 1,1 and the graphics card died. I'm not sure if I want to replace the card, though I'm thinking of doing so just to use the Mac to access the files on the internal drives for tagging in Lightroom. 1. Can anyone recommend a graphics card that will be good enough for just viewing photos and videos in Lightroom? 2. Is it a bad idea to buy a used graphics card? Thanks.