Greetings from Texas, My friend's Mac Pro 3,1 (2008) A1186 suffered a power loss at his recording studio. He brought it in for service and they determined it was the Logic board that has failed. I will be the new owner of this MacPro3,1. I want to salvage and rebuild it. Can I: A: buy a Logic board from somewhere such as eBay from the 2009-2012 cMP models to replace the fried Logic board? A.5 Will the replacement Logic Board even fit physically? B: Can I buy a CPU Upgrade Tray with Dual Core to use with 2009-2012 Logic Board? C: If I decide not doing the CPU Upgrade Tray route, can I upgrade the single processor to Intel Xeon x2620 2.0ghz? The end result I want to achieve is how I want for another machine I have successfully upgraded, which is: 2009 Mac Pro 4,1 >firmware upgraded to> MacPro5,1 (flashed) 2x 3.33ghz 6-Core Intel Xeon (dual cpu tray) 8 RAM Slots Thanks for reading, I'm not sure if I left out any details.