I just got a 3,1. It's a single quad core Xeon, 2.8Ghz. I would like to upgrade to 8 cores, preferably with a bump in speed. Would this work, and is it a reasonable price: http://www.ebay.com/itm/251202978661?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 Also there are some YouTube videos showing a CPU upgrade on a 2006 model. Would they be applicable for an early 2008? Thanks a heap!