Custom build for a friend's business! This little beast drives 12 independent screens via 3xHDMI outs on each of the 4 Video cards, and also one DVI monitor (Primary display). In the future we'll use 6-Out DP Cards.
The H115i CPU Cooler is mounted as a front intake but I connected the bottom rad fan power to Chassis4 on the motherboard so I could control it manually via the BIOS to increase air flow past the video cards. The H115i software controls the upper rad fan with it's normal connector.
(CASE) Case was almost too small! - The bottom metal shielding which covers the power supply and hides some of the cables had to be removed for an extra 1/2inch clearance for the 4th GPU - a larger case would have solved it, but I didn't want to re-build with a larger one ;)
(CASE) Not enough expansion slots - The case has 7, but 8+ would have been better.
(4th GPU) I had to snip away some of the mounting bracket on the 4th GPU to make it fit due to lack of expansion slots.
(GPU FANS) All GPU fans had to be removed in order for them to fit into the motherboard. I kept one fan connected and rigged up a little mount for it using one of the vertical expansion slots on the case. GPU usage will be extremely low so overheating will not be an issue.
Overall, this was a really fun build, and it's pretty cool to see all of the screens hooked up, sorry the picture is a little blurry! :D