I have that exact monitor and the EVGA bridge. I saw a little flickering when I ran the Valley benchmark, but just ran it once or twice so need to try it more. Heaven ran fine though. Metro LL benchmark ran fine too. I haven't tried many games to give 100% confidence that the bridge is not causing any flickering though. But I haven't seen anything other than on Valley.

I have the 2/3 way bridge. I know they did a revision not long ago to address the flickering, but I believe it was specifically for 1440p and high FPS, like 120Hz.

I should be able to try some more games later today or tomorrow. I'm fairly confident there is no issue. I believe the Valley benchmark has been quite flaky with latest drivers so I'm not too concerned about it. I think I ran Firestrike and had no issues either. Don't remember which driver I'm on, I think the latest WQHL one.

I have the 3way pro bridge and the pro 4way bridge and the Samsung ud590d and and both flicker especially in games with post processing on high (really bad on crysis 3) and when there is a lot of blue on the screen at once some games it is not too noticeable like heavily modded skyrim and if you turn it down to 1440p no problems but it is always there in 4k and when I change to a standard sli bridge problem solve not a single issue on any game or benchmark