Running Four PCI Express Graphics Cards
Things get a little tricky if you really intend to use four graphics cards, while attaching lots of storage devices at the same time. Expect a fair amount of "spaghetti" in the case if you add in a lot of components.
SLI With Four GPUs?
While four SLI-capable graphics cards could not possibly be linked using the SLI bridges, a quad GPU setup can be set up using Gigabyte's own 3D1 graphics cards series. As a matter of fact, the revision 2.0 models come with SLI connectors in addition to running two GPUs per card, making these perfectly suitable for a quad GPU SLI setup.
There is bad news on the drivers front, however. Right now, NVIDIA does not support four GPUs for SLI, as the firm presently does not intend to go in that direction. This leaves Gigabyte pretty much standing in the rain, because what they have devised is more than just something new - it is nothing less than anticipating what we are going to see in the future. Processors are increasingly going dual core, with multi cores to come to further share the workload. And things are not so different in the graphics arena either, where parallelism has been taking place for some time; we presently see increasing numbers of programmable shaders pixel pipelines.