Hello Guys. in 2007 I purchased my first ever mac pro 1.1 intel. 2 x 2.0 GHz Dual-core Xeon "Woodcrest 1GB ram (2x512) GeForce 7300 GT and right now I'm looking into upgrading processors. somewhere in the apple discussion I find out that I should look at: Intel Clovertown Xeon processors. E5345 (2.33 Ghz), E5355 (2.66 Ghz) or X5365(3.0 Ghz). I need a pair. Those are Quad core processors and are pin for pin compatible with the 2006 Mac Pro 1,1, they say. Bloody hell they are hard to find. Is there a possibility to install anything else inside??? I have this website with good prices. I set to search for Intel socket 771 Xeon quad, duo http://www.optima.cz/komponenty/procesory/?vyr%5B0%5D=&vyr%5B2%5D=Intel&fp%5B1085%5D=46&fp%5B1194%5D=58&fp%5B8360%5D=58&fp%5B1278%5D=58&fp%5B0%5D= Is there something that would work? What did you people install for CPU?? thanks in advance!