I'm having a slightly different issue than everyone else who's having video issues in these threads. (Fun, fun!) I have a single PA271W connected via a mini-DP to DP cable. This monitor works fine if I connected it to my iMac. On the new MP, it won't drive it at boot up. Apple sent me a replacement 5870 card today that does the exact same thing. The display does work via DVI. Does anyone else have this configuration that could verify it will cold boot a single PA271W off displayport? If so, then I know my MP is defective and I'll have them swap it out. Or, if you have other ideas I should try, by all means... Thanks, Ben p.s. Get this: if I start the computer on DVI, unplug it after it's up, and plug in either displayport port... it fires up the monitor at 378x1440 pixels. That's not a typo -- 378 pixels across! ?!?!