2012 Mac Mini works at 4K w/Asus PQ321Q

[sickntired]

Just installed Win 8.1 through Bootcamp onto my 2012 Mac Mini with i7 and was pleasantly surprised that it worked at 3840x2160 albeit at 30Hz with my new Asus PQ321Q monitor. This is with DP cable attached to the thunderbolt port.

Looks incredible.

Using OSX Mavericks, could only get 1920x1200.

 

[brdeveloper]

Just installed Win 8.1 through Bootcamp onto my 2012 Mac Mini with i7 and was pleasantly surprised that it worked at 3840x2160 albeit at 30Hz with my new Asus PQ321Q monitor. This is with DP cable attached to the thunderbolt port.

Looks incredible.

Using OSX Mavericks, could only get 1920x1200.

I wonder what is needed for a Thunderbolt 1 refreshing at 60Hz (probably some non-standard compression still being defined between consortiums.

 

[rndman]

Just installed Win 8.1 through Bootcamp onto my 2012 Mac Mini with i7 and was pleasantly surprised that it worked at 3840x2160 albeit at 30Hz with my new Asus PQ321Q monitor. This is with DP cable attached to the thunderbolt port.

Looks incredible.

Using OSX Mavericks, could only get 1920x1200.

Why only 1920x1200 with Mavericks.
I am running the 2560x1440 (and many others I guess) on it

On a positive note though, the hardware can support 4K. It's just the "issue" with the OS looks like.. An update (to OS X) should do the trick (if only Apple desires so)

 

[sickntired]

You are able to 2560x1440 in OS X using the same monitor?

Were you connecting with a DP/Thunderbolt cable or using HDMI connection?

With HDMI, I get some weird resolution that looks distorted. I forget the exact resolution but it was higher than 1920.

 

[rndman]

You are able to 2560x1440 in OS X using the same monitor?

Were you connecting with a DP/Thunderbolt cable or using HDMI connection?

With HDMI, I get some weird resolution that looks distorted. I forget the exact resolution but it was higher than 1920.

No. not the same monitor. But OS X handles 2560x1440 as long as the monitor is capable and which yours is.
I have PB278Q connected using DP.

With HDMI it maxed out at 1080P

On a side note. If your monitor also has Aspect ratio setting, set it to 1:1 and then see if it is true 4K and not upscaled.

 

[sickntired]

I have the monitor on "normal" which is not scaled. Windows also shows that it is at the right resolution.

The resolution I get with OS X using an HDMI cable is a weird 2048x2160. The other choices are 1600x1688 and 1344x1418. Never seen those kind of resolutions before.

 

[rndman]

I have the monitor on "normal" which is not scaled. Windows also shows that it is at the right resolution.

The resolution I get with OS X using an HDMI cable is a weird 2048x2160. The other choices are 1600x1688 and 1344x1418. Never seen those kind of resolutions before.

That's really strange...
May be experts here can shed some light..

 

[RoyQ]

Hi sickntired,

Have you ever configured your ASUS PQ321Q to MST mode to see if your 2012 Mac mini works at 4K/60Hz with Windows 8.1?

Using 4K displays and TVs with Mac computers

These displays default to 30 Hz (instead of 60 Hz) and need to be manually configured to support 60 Hz using the display's built-in controls by enabling MST (multi-stream) mode.

For the ASUS PQ321Q, you can modify this under OSD menu > Setup > DisplayPort Stream

 

[sickntired]

using Win 8.1, it doesn't work properly at 4K at 60 Hz using MST. It's been a while since I did it, I believe the screen was just blank. Switching back to SST (and 30 Hz), it worked properly.

 

[blanka]

Does it also work at 24Hz? Or 23.976 to be precise. That is more relevant than 30.

 

[howardlong]

I have this working on a Mac Mini 2012 too with Windows 8.1, Bootcamp 5.1.5621 drivers and an AOC U2868 display 3840 x 2160 at 30Hz. This is using the Mac Mini's Mini DP port. The Mac Mini HDMI appears limited to 1920 x 1080 maximum resolution.

It does have an option for 24Hz which works too at 4k, but whether that's really 24Hz or the cinema frame rate I don't know.

*** Special note! Be aware that the current Intel graphics drivers that Windows Update tries to install by default (10.18.10.3621) will break 4K and limit you to 1920 x 1080. Make sure that you use the driver from Bootcamp 5.1.5621 (Intel driver version 9.17.10.3347).

Irritatingly, if you have the default Windows Update settings switched on it'll revert your drivers every day as an "Important Update":

Intel Corporation - Graphics Adapter WDDM1.1, Graphics Adapter WDDM1.2, Graphics Adapter WDDM1.3 - Intel(R) HD Graphics 4000

Update type: Important

Intel Corporation Graphics Adapter WDDM1.1, Graphics Adapter WDDM1.2, Graphics Adapter WDDM1.3 software update released in May, 2014​

You must set Windows Update settings to allow you to choose which items to install and remember to uncheck this each time you do a Windows Update.

This driver works at 4k (9.17.10.3347):

The driver doesn't work at 4k (10.18.10.3621):

 

[howardlong]

A quick note to add the following, all applying to Windows 8.1 on Mac Mini 2012 as before.

1) Using the Intel Graphics and Media control panel in Advanced mode, you can add a 2560 x 1440 30Hz mode for the HDMI port, and run simultaneously 2560 x 1440 (HDMI) and 3840 x 2160 (Mini displayport).

2) For two 4k monitors on Windows 8.1, I am using a Club-3d CSV-2302 USB 3.0 to displayport adapter on one monitor, and the integrated mini displayport on Intel Graphics 4000 on the other.

Neither solutions work on OSX Mavericks for 4k though.