11-19-2013, 07:57 PM
It's technically possible to run 4 cards but it won't be straightforward. You can run 2 double slot cards and maybe can put a third card at the bottom if it's a single slot card. A double-slot card in the bottom pci-e won't fit in the case so it's not an option. Other than that, you need PCI-e extenders for the third slot that will be covered by a double-slot card in second pci-e slot and for the bottom slot if you want to put a double-slot card. Beside that, you need really good cooling in there and a good PSU (or 2) to provide power to all these cards.