Hi, First, you guys are an amazing resource and thank you so very much. I've been able to find tons of useful information going through the forums. I just put in some Xeon 5355s into my stock Mac Pro 1,1. The upgrade seemed to go well, but after I put it all back together, the computer turns on, but I don't get a signal to the video card. It's a stock, base model Mac Pro with the NVidia 7300 (I think that's the one) video card. The Mac Pro's at work, so I was wondering what I should look for when I go in tomorrow to troubleshoot/fix. Any suggestions would be most welcome. Thanks so much.