Reason i posted this is because i remember a thread about dream machines, i think this would fit quite well. On that it has 2 PCI-e slots, so wouldn't SLI be in the realm of possability. Appro - High-performance Workstations, Servers, Clusters and Storage Solution
yeah i found the post thread again, and you said you wanted opteron system with sli, i think that would be sweet to. Anyways do you know if this system supports SLI, just curious.
Without knowing what motherboard, I couldn't say. PCI Express slots come in 1x, 4x, and 16x slots. However, they may be fed less than that (or disabled in the case of 1x slots). A lot of workstation/server motherboards with physical PCIe x16 slots may only have 8x or 4x worth of lanes going to them. In otherwords, PCIe lanes are configurable. But that makes sense, given the serial design (no sharing). Additionally, driver support from nVidia for the chipset is required.