rMBP Iris 6100 Gpu - 2x UHD(3840x2160)/@60Hz?

built in display is always working, i get view on the external 1st monitor 4K 60z, but on the second external monitor which is as well 4k, i cannot get view. i use mini dp to mini dp cable from thunderbolt port of mac to monitor. do you think it will make a difference if i use mini dp to regular dp cable? so that i can get 2 views?

Yes, it does. I can drive the internal display along with both external P2715Q displays (3840x2160@60Hz).

You cannot drive dual UP2414Q's in MST mode with the early 2015 13" RMBP. If you'd like to use both displays simultaneously, you need to disable MST mode (DP 1.2). This means you'll be limited to 30Hz refresh rate.

Can you clarify exactly how you have both monitors connected to both Dell P2715Q monitors that allow 60Hz? Are both monitors plugged directly into your MBP via Mini DisplayPort? Daisy chained?

Dear NVCM, MRCUR,

I can not drive my second Dell UP2414Q 4K display at 60 Hz, I use mini dp to mini dp cables for connection on both of the external monitors. Also Even though i can drive 1 external monitor at 4K 60Hz, there is still a lag that you feel while using it. For instance when i use my 21" iMac as external monitor. It feels much more speedy, is there a way to correct this?

I received my Dell P2415Q monitors and confirm my 2015 13" MBP is able to drive both monitors at 4k and 60Hz. I currently have both monitors plugged directly into my MBP's MiniDP/Thunderbolt ports. This is using the standard, non MST function. I tried daisy chaining the second monitor using the display port cable and MST but so far no luck. My only interest in daisy chaining is so I could use a standard Thunderbolt dock connected to my computer.

Anyone know if it is possible to daily chain the second monitor with MST?

Dear NVCM, i can not drive my dell up2414q monitor with my rmbp 13" early 2015 at 60 hz though i have enabled display port 1.2. I use mini dp to mini dp connection. do you use the same cabling or you use mini dp to dp type? i have read that mini dp port on the monitor does not support 60 hz. is you use mini dp to dp cable, please tell me which brand is it? when i use the one which came with the dell monitor, my mac freezes and starts acting weirdly

Hello,

This is exactly what I am trying to find out. I currently have a Dell 27" UltraSharp 2k monitor connected to the Early 2015 13" rMBP and an old Asus 1080p. Unfortunately, I have them connected to the laptop each through their own miniDP port on the computer.

What I would like to know is: If I purchase a Dell 27" 4k monitor, can I daisy chain the 2k and 4k to free up the other port? Or will I have to have them both plugged directly in to the computer to get them to both run as independent (not mirrored) desktop space, and doing so at 60Hz?

I usually don't use the internal display since I have it sitting in a vertical Henge Dock.

"Unlike the 2014’s UP2414Q model, the new P2415Q model supports full refresh rate of 60 Hz via DisplayPort interface without using MST mode.

MST mode in this monitor is used as intended — for daisy-chaining of two 4K monitors working at half refresh rate of 30 Hz."

Hey NVCM,

Are you still using this setup? Would love to know if you see any performance hits with your 13" MBPr (Early 2015) driving both monitors at 60hz. How often to your fans start up?

I am plan on using a vertical hengedock with dual P2415Q's.

Thanks!

Does this setup really work?

MacBookPro 13" retina early 2015 + 2 Dell P2415Q at 4k and 60Hz connected via thunderbolt?

Can anyone confirm? Photos of system report/graphics would be good!!

Thanks