Submission + - Upgrading CPUs of a Mac Pro to Quad Core Xeons
EB writes: "Macbidouille/HardMac just released a step-by-step procedure to replace original Dual Core Xeon CPUs of a Mac Pro 3.0GHz by Quad Core Xeon X5355 CPUs clocked at 2.66GHz. OSX can already handle all cores, so let's get a 8-Core Xeon-powered Mac Pro before Apple releases it.
http://www.hardmac.com/articles/70/"