The best one that is probably supported out of the box is a C2Q Q9550S, but that's a little expensive. You can probably get a modded Xeon X3363 for cheaper, but it'll take a bit of fiddling to get it working (bios update/socket mod/ microcode update)
The best one that is probably supported out of the box is a C2Q Q9550S, but that's a little expensive. You can probably get a modded Xeon X3363 for cheaper, but it'll take a bit of fiddling to get it working (bios update/socket mod/ microcode update)