Okay. Here we go again! These excellent forums helped me order my new Quad mac pro with the Radeon 4870 card. I queried whether this would work with an Apple 20" matte aluminium cinema display I had uncovered boxed and unopened in my local reseller store. They showed me an identical 20" screen up and running on a new Mac Pro which had the stock Nvidia GT 120 card. I bought the screen (as yet unopened). I await the Mac Pro. I have just read this... http://discussions.apple.com/thread.jspa?messageID=9463473 Obviously a degree of panic is setting in, as once I open the box to test the screen (when the Pro arrives) my chances of returning the 20" will be minus zero. Apple have pushed me from pillar to post and cannot definitively say whether it will or wont work in these circumstances. My question. is it feasible that it mightn't work with a particular graphics card? Is there any cheery soul out there who can tell me that they have the new Mac Pro, Radeon 4870 and a 20" matte screen that is working perfectly? Thanks chaps!