DirtySouthWookie
100Hz is about right. That's what I push with 2 980 TIs @ 3440x14440p at most.

CoercionShaman
Well, curiously TFT said the GSYNC would have ULMB.  I thought that only worked at 100Hz?  Still wondering if the GSYNC module will assist in the overdrive circuit.
 
I did order the Dell u3415w yesterday while it was $809.  It comes in next week for some reason even with two day shipping.  I may very well be happy with that and it will be $500 less.  If I feel I need the GSYNC after getting it, I'll use it until the others come out and assess where I would be on selling it and picking up the newest.

CoercionShaman
Just got in the monitor.  I am really liking it.  Only hitting 46 FPS on Witcher in ultra with hair works, but it feels smooth, oddly.  Will tinker some more this week and see.  Hits 75Hz, but haven't tested for frame skipping yet.  Now thinking rather than spend the $500 on the GSYNC model may either wait it out for next card gen or apply that money towards getting a second Titan.
 
Back light bleed is there but minimal.  Only see it with black screen and even then not very noticeable while gaming in the dark.  Can't see it all with colors on the screen.  I am pleased in that respect.  This thing is a monster as far as size.  Colors are fantastic.  Initial impression... this is the monitor size and resolution to own.  I love it.

CoercionShaman
So, an update now that I have had more time with the u3415w.  I like this monitor.  I really do.  I have decided, however, that demanding games with eye candy need either SLI or GSYNC.  Period.
 
In W3, turning off AA doesn't make a huge difference in visual appearance.  It also doesn't make a huge difference in FPS.  I can hit 60FPS in some areas, but generally I get between 46 and 53.  It often seems smooth, but I am starting to notice the stutter on occasion.  And now that I am seeing it, I see it more.  Playing SWTOR or less demanding games I can hit the 60FPS mark with no issues and it looks great.  Now I have to decide if I want to wait for the Acer or ASUS monitors and spend the extra $500 or put that towards another card... sigh.
 
On a side note, I got the opportunity to play around with a Samsung 40" JU6500 4K TV.  It is jaw dropping with the 4:4:4 UHD color and the glossy screen. It is absolutely beautiful.  The only downside was that I had to be careful of the light sources behind me because of reflections, but I have never seen something that amazed me as it did for the visuals.  Well, another downside and the fact that I would need SLI on it as well.  I did play around with a custom resolution that provided the black bars above and below and ran in 3440X1440 and adapted to that well in just a few minutes.  And it is only $699.
 
I just don't know what I want to do now. 

CoercionShaman
According to questions answered by the 'Acer Service Team' on Amazon, the X34 will be 75Hz like the XR341CK.

CoercionShaman
I trust TFT Central.  100Hz confirmed now.  Stock in early October.
 
https://twitter.com/TFTCentral/status/626440504037756928
 
 

CoercionShaman
Some users on the European forums are reporting that the Predator X34 has shipped to them.  I can not verify the validity except to say that a couple of German sites do show it shipping now when you visit them.  The ASUS PG348Q is supposed to be either Christmas or first of the year release according to latest rumors.
 
As a side note, I am still liking the u3415w that I purchased.  It is doing well at 75Hz and I don't see any latency or ghosting issues in the games I play.  It could be noticeable in fast moving FPS titles.  It is on sale at Amazon right now for $783 making it about $550 cheaper than the anticipated price of the X34 when including taxes.  I have a feeling that I will be on the next generation of these monitors when they start releasing, though.