Hi Folks. I have just received a new Mac Pro. I am trying to run the Benq 27 and the BenQ24 as dual monitors using the HDMI ports on the back of the system. The second monitor (24) is pixelated, blurry and certainly not 4k standard. Is there an easy fix for this that I am missing?
I have tried alternative cables of all types.
This is very frustrating for such a hyped system.
Thanks in advance for any help you can offer.
Jo.
Hello Jo. You need a usb-c to DisplayPort cable. you can connect it to any of the usb-c ports [top or rear of the Mac Pro] and then to your monitor. Here is a support link https://support.apple.com/en-us/HT210228 be sure to look at the thunderbolt 3 adaptors in the blue hyper text. I would stay away from the hdmi cable it only supports 30hz refresh rate , the use-c to DisplayPort cable supports 60hz refresh rate. I hope this helps. It is a bit confusing. good luck.
Rick
Hello Jo. You need a usb-c to DisplayPort cable. you can connect it to any of the usb-c ports [top or rear of the Mac Pro] and then to your monitor. Here is a support link https://support.apple.com/en-us/HT210228 be sure to look at the thunderbolt 3 adaptors in the blue hyper text. I would stay away from the hdmi cable it only supports 30hz refresh rate , the use-c to DisplayPort cable supports 60hz refresh rate. I hope this helps. It is a bit confusing. good luck.
Rick
Hi all,
So I have connected the Mac Pro (desk top) to the second monitor now with a USB-C to mini display cable but still no joy!
It is refreshing at 59.88Hertz which I can not change. Any other suggestions or do I carry on, as I have before, with a below standard system. Its becoming par for the course with the MacPro's.
Jo.
Hi Grant
its a BenQ PG24 inch. The new 2020 Mac Pro doesn’t offer a display port only hdmi I have tried cables that are hdmi to mini dp and hdmi to dp and the mac doesn’t recognise the monitor at all with these.
I would love to try it with display port but I just don’t see how it’s an option into the Mac.
any suggestions?
jo
Rwb53
this is very helpful and ironically pretty much the only cable I don’t have and haven’t tried. I have one on order and will Cris’s my fingers it works.
the mind boggles as to why Apple even bother with the hdmi ports. Two extra lightning ports would have been more helpful.
thanks for your help.
jo
As I understand it the refresh rate for 4k should be 60Hertz. I was merely noting what the rate is and the fact that it is unchangeable. The screen grab shows the blur. These are all things that have been asked for by others looking at the problem.
I am looking for a fix for this problem.
Your Mac sets parameters such as required refresh rates from the response to a query to the display itself. The display answers with its name (which is why the box has the display-name, which you never typed) and the display capabilities.
I doubt the problem with the blurring along the right edge is due to the tiny difference between 60.00 and 59.88 Hz.
DisplayPort family sends only the changed data, and when the screen stops changing, the link goes quiet (i.e., there is essentially NO refresh). The actual refresh on the screen comes from the display's Internal screen buffer. This suggests that there may be some problems with the "On-screen display" parameters set in the screen itself. Perhaps some internal settings were changed to accommodate the previous 30Hz refresh.
It should not have any impact on the issues you raise, but you may be able to get access to additional resolutions or refresh rates by holding the Option key while clicking on the Resolutions box in Displays Preferences.
Jo, in Displays Pref Pane, if you hold alt key while choosing Scaled, are there better choices?
Are they set as Extended, not Mirrored?
BDAqua
Thanks for your reply. No they are not mirrored and the alt key does not offer any additional scaling options.
Jo.
If your displays (what models exactly?) offer DisplayPort family, it will provide a superior picture quality and likely superior refresh rate. HDMI was designed for HD TV sets.
Here is one that supports 4K at 60Hz:
Monoprice Consul Series USB-C DisplayPort Adapter -- Product # 35503--$15.24
.
The two more ThunderBolt-3 ports are on the top of the chassis, equally inconvenient to run the cables out the front or the rear.
What should we be looking at in the graphic you posted?
How did you decide the refresh rate, and why is the stated rate unacceptable?
4k dual monitors issue on New Mac Pro (desk top)
