Question ASUS PG27UQ not displaying correctly at frequencies over 60hz

[ElAmoDelQueso]

I got this monitor (refurbished) in the mail today, and I've been trying to set it up the past 2 hours, but I can't seem to get an image at over 60hz, in any resolution (I've tried 4k, 1440p, and 1080p). As soon as I turn up the frequency to 61 or higher, it seems the display gives up with displaying the image, but it shows some kind of blurry light, quite likely the individual lighted zones (not entirely sure since it's my first monitor with this feature). I know my PC supports higher hz since I've had a 1080p 144hz monitor for a while with no issues.
Could the problem be the cable, or should I return the whole screen?

 

[Mooons]

You have to use DisplayPort to achieve 144HZ.

 

[Glenwing]

You have to use DisplayPort, Dual Link DVI-D, or HDMI 1.3 to achieve 144HZ.

It's a 4K monitor. DVI and HDMI won't support more than 60 Hz.

I got this monitor (refurbished) in the mail today, and I've been trying to set it up the past 2 hours, but I can't seem to get an image at over 60hz, in any resolution (I've tried 4k, 1440p, and 1080p). As soon as I turn up the frequency to 61 or higher, it seems the display gives up with displaying the image, but it shows some kind of blurry light, quite likely the individual lighted zones (not entirely sure since it's my first monitor with this feature). I know my PC supports higher hz since I've had a 1080p 144hz monitor for a while with no issues.
Could the problem be the cable, or should I return the whole screen?

Higher than 60 Hz requires a DisplayPort cable that can handle HBR3 speeds. Are you using the cable that came with the monitor, or a 3rd party one?

 

[Mooons]

It's a 4K monitor. DVI and HDMI won't support more than 60 Hz.

Whoops I was thinking 1080p. Thanks for the heads up.

 

[ElAmoDelQueso]

Higher than 60 Hz requires a DisplayPort cable that can handle HBR3 speeds. Are you using the cable that came with the monitor, or a 3rd party one?

I'm using the DP cable that came with the monitor (it's RoG branded and has "8k" printed on it.). I'll try using the one I was using with my old monitor.

 

[ElAmoDelQueso]

Just tried with my old monitor's DP cable, same problem :| I'll try cleaning the connectors in case there's dust causing issues...

 

[ElAmoDelQueso]

cleaning the DP ports with an air duster didn't change the situation, guess I'll contact the seller.

 

[Glenwing]

cleaning the DP ports with an air duster didn't change the situation, guess I'll contact the seller.

What graphics card are you using?

 

[ElAmoDelQueso]

What graphics card are you using?

It's a ZOTAC GTX 1070 AMP Extreme, it has DP 1.4 support so that shouldn't be the issue.