Dual 4k support for MacBook Pro Mid 2014

Stephane,

How did you force your Dell panels into 30Hz? The only way I could do this feels really hack and is documented here:

Recipe for using 2 x Dell P2415Q at 4K, 30Hz with Mid 2014 MacBook Pro

I would, of course, love to use them both at 60Hz if anyone knows how to achieve that?

cheers,

Chris

Hi Stanley07,

I want to buy this monitor Dell P2715Q , but i have some doubts if this works fine with MacBook Pro 13" Retina Mid-2014, i have the middle model, with i5 processor and 8 gb of ram and 256 GB SSD, i want to know about your model, have an extra memory of video? or something else?

Regards,

I can report the following with my MacBook Pro Early 2015 (Intel Iris Graphics 6100 1536 MB) using dual Dell UP2414Q displays:

• 4k resolution works on the displays when I have them both of them have DisplayPort 1.2 disabled. This seems to turn off MST.
• Only one screen lights up when DisplayPort 1.2 is enabled on one or both of them.
• When using 4k resolution (i.e. with DP1.2 disabled) they are limited to 30 Hz.

Hi larrysing,

Which monitor (P2715Q vs LG34UM95) is of better quality.../ which would you recommend more?

Could anybody confirm 60Hz using the aforementioned monitors on rMBP 15 Late 2013 with NVIDIA GeForce GT 750M?

eliot - I have the same setup with the rMBP Late 2013 and GeForce. Same result as larrysing - both full res and 60Hz. I was looking at this thread because I was actually thinking of replacing the LG with another Dell (same model) - that's how much I prefer the Dell. Mainly because I can run it in "retina" resolutions and the text is so much sharper when I'm coding. From what I read doesn't seem like I can do that and have both at 60Hz. If you decide on the Dell and read this in time, there is a sale on them on eBay - $449! (http://www.ebay.com/itm/331660431603)

Have you tried two monitors with 2560x1600 at 60 hz?

Would be nice to know if that works.

15" Mid 2014 or Later: This model can drive up to two 4K displays at 60Hz with the NVIDIA GeForce GT 750M. The Mid 2015 15" MacBook Pro with AMD Radeon R9 M370X graphics can also drive one 5K display connected with two Thunderbolt cables.

15" Late 2013: This model is equipped with two Thunderbolt 2 ports that can drive one 4K display at 60Hz or two 4K displays at 30Hz. This model also supports one 4K display at 60Hz over Thunderbolt and one 4K display at 30Hz over HDMI.

Source: http://www.macrumors.com/guide/4k-5k-displays-buyers-guide-mac/