I was thinking about a single GPU for Zcash. After much reading here I have come to the conclusion for a single GPU to go with a 1080ti. I looked on Amazon and there seems to be a few different versions of it from Nvidia.
![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
Are there some features I need to be aware of picking out one of these?
Also if I built a PC using an open case like the Thermaltake Core P1 or similar. Could I add a second or third 1080ti later on in a small frame behind it and just hook them up? I didn't really want to go crazy with it right off the bat. If I decided it wasn't for me I could still use it as a desk top PC with only the one GPU and not have a big chassis sitting there for only one GPU.