Hey guys, I just did some testing on my SLI rig and figured I'd share the results and some notes with you guys.

• SLI definitely needs to be disabled for multi-gpu to work correctly in this game. Playing with SLI and multi-GPU enabled in the options will eventually cause my entire system to become unstable, especially when using G-Sync. 
• My specs: pg279q, 32gb RAM, i7-4930k, Rampage IV Black, 2x Zotac 980ti Amp! Extremes @1430mhz boost. 
• I tried benching the game at both low and high settings. In either case, the game ran at around 50-55 FPS. When lowering the settings, the GPU utilization would drop but the frame rates would not increase.
• Attached is a file showing GPU utilization, temperatures, and memory utilization while the game benchmarked at max settings. As you can see, the GPU utilization ranged from about 49-87%. The load balancing between the two cards is fairly even. Interestingly though, the VRAM is empty on the second card the entire time. 
• Here's the link again just for good measure: http://pastebin.ca/3383614. I removed the time stamps to make it a bit easier to read. 
• I'll try and keep this updated as the builds and drivers come out. Hope this helps!