Can I run an additional 4k monitor off the 5k iMac?

[macmee]

I have a macbook pro 2014 that's powering my 4k monitor, but it's sort of laggy.

So, I'm eyeing this new iMac with 5k.

I only want it, however, if it can support both the built in 5k monitor and an external 4k monitor (DP 1.2) without lag.

 

[FredT2]

I have a macbook pro 2014 that's powering my 4k monitor, but it's sort of laggy.

So, I'm eyeing this new iMac with 5k.

I only want it, however, if it can support both the built in 5k monitor and an external 4k monitor (DP 1.2) without lag.

Yes.

https://forums.macrumors.com/posts/20155374/

 

[WinstonRumfoord]

I have a macbook pro 2014 that's powering my 4k monitor, but it's sort of laggy.

So, I'm eyeing this new iMac with 5k.

I only want it, however, if it can support both the built in 5k monitor and an external 4k monitor (DP 1.2) without lag.

at 60hz?

 

[theSeb]

Yes.

https://forums.macrumors.com/posts/20155374/

Although "without lag" is subjective

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at 60hz?

Yes, this is possible

MacBook Pro (Retina, 15-inch, Late 2013, Mac Pro (Late 2013), and iMac (Retina 5K, 27-inch, Late 2014) computers also support multi-stream transport (MST) displays at 60 Hz.

If you use a 60Hz MST display with the MacBook Pro (Retina, 15-inch, Late 2013) or iMac (Retina 5K, 27-inch, Late 2014), only one additional Thunderbolt display can be supported. See Thunderbolt ports and displays: Frequently asked questions (FAQ) for more information on Thunderbolt displays.

You need to manually configure 4K displays to use MST.

http://support.apple.com/kb/ht6008

 

[macmee]

Although "without lag" is subjective

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Yes, this is possible



http://support.apple.com/kb/ht6008

The fact that Apple updated that page so quickly is freaking impressive. Damn this is a weird company.

 

[EnderTW]

Although "without lag" is subjective

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Yes, this is possible



http://support.apple.com/kb/ht6008

Wow Nice find!

As with OP, I'm surprised they updated this page quickly.

iMac driving 9k ! (5k + 4k screen) whew.. I have the 4k Dell, going to test this to see if it's smooth. I won't be editing 4k video or anything like that. I get my iMac on Friday, I'll let you folks know how the performance is.

 

[theSeb]

A 5K monitor and a 4K monitor does not equate to 9K resolution, but I get what you mean.

 

[EnderTW]

A 5K monitor and a 4K monitor does not equate to 9K resolution, but I get what you mean.

haha very true.