Hello, I would like to install another GPU in my PC. I have an Asus Sabertooth Z97 Mark 1 motherboard, and a Corsair AX860i PSU. I have 1 Zotac 980ti Amp Extreme and would like to install a second one. However it looks like it would block the fans of the other one and may cause problems with the wires at the bottom of the motherboard. Thoughts? Could I install a GPU of a different brand/clock speed? I want to be able to run GTA V in 4k maxed out at 60fps and the 1080ti can only do 55fps at 4xMSAA, so I would like the performance to at least equal the 1080ti. Also on a side note, my case is an InWin D-frame limited edition #400 out of 500, any idea what I could get for it? Thanks