There seems to be some disagreement on this topic.
A.) DP hubs do not work
B.) DVI-D isn't strong enough for 1440p @ 144hz (doesn't really pertain)
C.) ASUS claims that it works on their Swift FAQ. D.) ASUS claims it REQUIRES TRI-SLI, one DP to each monitorQuote:
Josh@NVIDIA
Gysnc surround is not supported at the moment with Tri SLI setups, but its definitely something we are working on to get supported asap
Posted 01/16/2014 07:06 PM
Quote:
How do I setup Surround Gaming [for 3x PG278Q in triple monitor setup]?
“My graphics card only has 1 DP: can I convert DVI/HDMI to DP?”
Currently to enable surround [triple monitor] G-Sync you will need 3 GPUs in triple SLI configuration.
DVI-DL does not have the bandwidth to support 2560 x 1440 at 144 Hz.
We do not recommend using an HDMI to DP adapter as this is not qualified or supported in Nvidia drivers.
DP daisy chaining is also not supported – a single WQHD, 144Hz G-Sync monitor needs all the bandwidth available on DP1.2 that a second monitor is not possible.