There are at least 2 generations of the motherboard, make sure you get the second (z620). Also if it still has the original workstation Nvidia card, toss it and

There are at least 2 generations of the motherboard, make sure you get the second (z620). Also if it still has the original workstation Nvidia card, toss it and replace it. Pissed off the cat that settles on top of the machine since it was no longer so warm, but definitely cheaper to run and the new cheap card is faster too.