Originally Posted by slaWter
You also get business class support and drivers. That's a BIG difference between GeForce and Tesla. By the looks of it, this system is used for professional workloads. So a few thousand bucks shouldn't be a problem.
While true for large corporations, smaller companies aren't so keen on dropping a couple thousand on something that should work the way it is.
There are commercial systems available that include 4+ GPU's and can be setup with 580's, so it should be possible. They don't seem to have driver problems. But then again, I'm pretty sure they run custom Linux variants.