Was your dp cable vesa certified? Did you test all the dp outputs?

If all three cables weren't vesa certified that could definitely be your problem.

No problem. 

I googled previously and none of the posts were similar to mine,using a dvi-d causes a snowy picture in 144hz,its ok at 60hz on dvi,already am on hdmi for the last 3 days,i am taking Sajin's advice and going to try a vesa certified dp cable.

unless its another junk cable the dvi ''dual link'' should work    using that for years  with out issue   [dvi-I from card to hdmi to monitor ]
 
'' Single-link cables and hardware support up to only 1,920×1,200 resolution, but dual-link DVI supports 2560×1600. DVI is capable of 144hz refresh rates, so it's a good choice''
 
that versa may not mean much as far as certified goes [ 1.2a - seems  for AMD gimmickware use ?]  , but I would select the latest revision 
 
https://en.wikipedia.org/wiki/DisplayPort
 
sure its not the monitor ?

YA,  maybe just one of them 900 series things  ?   try what you can and hope it works out . its nothing but more money . 
 
seeing you use that malware service called windows 10  [lol]   have you looked at any of that and non working display port ?
https://www.reddit.com/r/Windows10/comments/3f86le/display_port_not_detected/?st=jg44z8me&sh=124ae574
 
https://answers.microsoft.com/en-us/windows/forum/windows_10-performance-winpc/windows-10-stops-recognizing-monitor-on/288099e4-0d01-404d-92c1-da32e73687eb
 
https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware/displayport-issues-after-windows-creators-update/eead5b02-d32e-44e7-8886-64efeea7a85f
 
with the release of the service [windows 10]  NVidia sure seems to struggle  with drivers  and fixing issues   like this and flickering and shuttering and so on ? just glad I not been duped / forced  in to using it .; i'll give up computer bulding first  before I stoop to 10 .; glad theres Linux around still
 
heres something why not burn a live dvd of linusx and see  if it kicks the display port in ?  cant hurt
 
if I had a display port use here I don't even know if it even works on my 900 card ..;lol.   heck it may not as well ? dvd-I and hdmi seem to be fine [so far]
 
Mint, please visit the forums.
 
I keep a copy or 2 handy for testing  or what ever   just takes time to boot up  but once to desktop off the dvd it fine and you can go  play around on it  like a full harddrive os so to say ..; even shoud go online and all 

Glad to hear that. 

Hmm. Maybe there is something wrong with the 1070. I'd do some more testing with the 970.

So you'll be rma'ing the monitor?

When running at 144hz over dvi were you running 1080p?

Did you try any other dvi-d cables?

So you didn't try any other dvi-d cables? You only tested the 970 & the 1070 with the same dvi-d cable?

Yeah, it probably is a monitor issue, but since you're experiencing the issue over dvi & dp you may have a faulty dvi cable as well.

Dave3d
All you really need is 120hz.
144hz is overrated.
As someone who has played nothing but twitch games and car games (until maybe 2013), with nothing but high-end monitors and systems, I can tell you that 144hz is not better than 120hz.
120hz is tops when it comes to gaming, where you can see any difference.
I have true 120hz monitors, and 2 144hz monitors, and I cant tell the difference between the 2 at all. The only difference is that dvi does not introduce input lag like hdmi and dp does. Or, it introduces MUCH less anyway.
Enjoy stable 120hz frames and gaming, vs the 144hz.
:)

You literally have no idea what you're talking about so why spout off with nonsense? There is virtually no difference in input lag from DVI to DP or HDMI they are all digital signals with no input lag advantage one way or the other across the standards. The only variable would be cable quality and the signal receiver of the monitor.