Muahahaha

[Pseudopsia]

However, keep in mind ARR cannot yet take advantage of SLI. A single 680 will perform better for ARR for now.

I will be supported.

It is just unsupported for beta. It's up to NVIDIA and AMD to update the profiles which usually happens around the release of a major game. All SE can do is work with NVIDIA and AMD to get profiles updated sooner.

I don't think it's right to upgrade your PC for beta. You should upgrade it for release, which means two GTX 670s are fine. It's wise to actually wait till at least the benchmark is released.