Need additional information.
1. It can't be flashed to have Boot Screen. Right?
2. What the earlist version of macOS does it support?
26. NVIDIA Geforce GTX 1080 8GB Founders Edition (FE), Unflashed
Performance: 259% RPI.
Power consumption: needs additional power (8 pins).
Outs: 3 x DP, HDMI, DL-DVI.
Compatibility: DirectX 12.0, OpenGL 4.6, Metal GPUFamily1v4. macOS 10.12.x - 10.13.6.
Other: occupies 2 slots, no Boot Screen. NVIDIA chipset - Pascal. NVIDIA CUDA cores - 2560.
User guide.
Unflashed (PC version): works without Boot Screen; can be flashed only by MVC.
#1 - As noted, needs to be flashed by MVC.
#2 - As noted above, Sierra at earliest.
Will note, this GPU does not need "additional power". The MP5,1/MP4,1 provides enough power without any modifications using both dual mini 6-pin cables. This is not "self powered" via PCIe, however. The stat, while it may be technically accurate, can be misleading and confusing. If this is to be a reference database for the future, would suggest rewording or relabeling cards powered this way.