You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Mac Pro Blurry output on 75hz.

I have a LG 27ML600M monitor that supports 75hz but when I set Mac OS to 75hz in the display settings it looks blurry. If I set it back to 60hz it looks normal. Any ideas on why this is happening? It is a 2010 Mac Pro with the AMD 5770 card.

Mac Pro

Posted on Dec 17, 2021 11:10 AM

Reply
5 replies

Dec 17, 2021 5:13 PM in response to jimmysofat6864

That display appears to be a 1920 by 1080 display with two HDMI inputs, no Displayport.


The cables you want for HDMI-only Monitors (higher resolutions than 720p TV sets) are marked as Certified with an anti-counterfeiting tag and are labeled:


"Premium High Speed HDMI cable" or that + "with Ethernet" --OR--

"Ultra High Speed HDMI cable" or that + "48G"


Cables with No Certification tags are good for your standard 720p TV set, and not much more.

Mac Pro Blurry output on 75hz.

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.