So, I have been thinking of upgrading my workstation at home for a while now, and I have found one possible solution. See, the MacPro came originally with 2 Dual core Xeons at 2.66Gz. if I wanted to move to 2 Quad Core Xeons (which I do), I would need to buy me a couple of Xeon 5355.  These ain’t cheap! Elara are selling them for a 683EUR, each!
 
So, while playing around, I found this post, talking about overlclocking the E5320 Xeon to 1333Mhz FSB, and how well it works with the mac pro. Given that the E5320’s sell for 245EUR, i can get 2 of them for less than the price of 1 of the 5355s. And, since memory is cheap, a couple extra gigs of ram will be thrown in for good mesure… 4Gb Kit (2×2Gb FBDIMMS) cost 136EUR on Shop4Memory at the moment…  which makes the total upgrade (2 5320s and 2 4Gb kits) EUR762… only 79EUR more than a single Xeon 5355!