MacBook Pro to monitor problems (DisplayPort)

[Renshy]

Hi,

I recently bought a monitor (SAMSUNG U28H75x) to hook my Early 2013 retina MacBook to. I tried using HDMI which works OK but has some lag so read about mini DisplayPort to DisplayPort and I'm trying that.

When I connect it, it's completely blurry and flickering different colours. I managed to change the settings of the monitor on the mac to 1280 x 720 and it works just obviously very large but the lag goes compared to HDMI... When I try to scale up past this setting though it completely messes up again?

Any ideas or help?

 

[maflynn]

If I didn't know any better, looking at the image, I'd say your GPU is failing.

 

[green86]

Hi,

I recently bought a monitor (SAMSUNG U28H75x) to hook my Early 2013 retina MacBook to. I tried using HDMI which works OK but has some lag so read about mini DisplayPort to DisplayPort and I'm trying that.

When I connect it, it's completely blurry and flickering different colours. I managed to change the settings of the monitor on the mac to 1280 x 720 and it works just obviously very large but the lag goes compared to HDMI... When I try to scale up past this setting though it completely messes up again?

Any ideas or help?

What resolution are you scaling up to? If it looks good with HDMI, I'd suspect a bum cable.

 

[Renshy]

Right, I have tested it now with a mini DisplayPort to HDMI. This scales without the distortion but only scales max 1080p or 1600 x 900? The colours are horrible on the 1080p setting but it allows me to select refresh rate at 60hz so looks fine in that aspect.
[doublepost=1533734697][/doublepost]I managed to get it just through HDMI to HDMI (DisplayPort wouldn't work). Max resolution at 60Hz is 2560 x 1440. It works fine on that but quality is not the best and doesn't look very sharp at all

 

[Renshy]

Just an update. I'm happy with the 1080p setting with HiDPi. It looks like it should do. The only problem is I can't get it to be 60hz. Only 30hz. Which is causing a lag.. (i'm guessing this is the reason why)

 

[green86]

Just an update. I'm happy with the 1080p setting with HiDPi. It looks like it should do. The only problem is I can't get it to be 60hz. Only 30hz. Which is causing a lag.. (i'm guessing this is the reason why)

https://everymac.com/systems/apple/...5-2.6-13-early-2013-retina-display-specs.html

Doesn't seem like your model supports 4k. I'd suspect that is where some of the issues arise from