I will be upgrading the 2.66 GHz CPU in my Mac Pro with a faster chip in the next few days. If anyone is interested in the Xeon W3520 2.66 GHz CPU that is currently in the machine, let me know and we can work out a fair price.
Mac Pro 5,1 - 2.8GHz Quad, 12GB RAM, 3TB HD
For sale is (my baby) a Mac Pro Mid-2010 - MC250LL/A* - MacPro5,1 - A1289 - 2314, purchased in October of 2010.
Mac Pro "Quad Core" 2.8 (2010/Nehalem) Specs (Mac Pro Mid-2010, MC250LL/A*, MacPro5,1, A1289, 2314) @ EveryMac.com
- Quad 2.8 GHz...
[SOLD!] Matched Pair of Xeon X5355s Quad-Core CPUs for your first-gen Mac Pro! - $400
Item has been sold, thanks for looking!
2 x Xeon "Clovertown" X5355 2.66GHz SLAC4 Quad-Core CPUs - $400 (+ shipping)
Had these in my MacPro1,1 as replacements for the stock dual-core CPUs and they worked...