How can I determine if one of the board partner new 1080's will fit in my system in SLI?

I'm currently buying the parts to build my PC, all I have left is the OS and GPU. I decided to go for one of the board partner 1080s. I eventually want to go SLI in the future. How can I tell if it will fit?

Here is my parts list without the GPU. I have my eye on the Asus Strix 1080.

Just wanted to thank you guys for all the help recently. I've learned a lot from you all!