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Just wondering since you have a similar set-up (also cMP 5.1 with GTX 680) the second display runs at 60Hz with 2560x1440P through HDMI?
I am using the second display through the DVI Port at 2560x1440 and both monitors are running at 60Hz.

Will the HDMI port even support that resolution ... or will it limit to 1080P?
 
I am using the second display through the DVI Port at 2560x1440 and both monitors are running at 60Hz.

Will the HDMI port even support that resolution ... or will it limit to 1080P?

Nah, 4K through HDMI even works, only then at 30Hz. If you are in the possibility, could you try the 1440P monitor with HDMI? Good to know that DVI goes up to 1440P at 60Hz
 
I am using the second display through the DVI Port at 2560x1440 and both monitors are running at 60Hz.

Will the HDMI port even support that resolution ... or will it limit to 1080P?
Yes, but with a caveat and I'm not sure why. I have two P2715Q displays - both are connect to my rMBP via mDP>DP cables; I can't get 1440p with my rMBP using either the Displays Pref Pane or SwitchResX. One of my displays is connected to my 2012 Mini Server via HDMI and it's "default" via either HDMI or an mDP>DP cable is 1440p (and I almost always use the display in portrait mode with my Mini Server) - it's not "Retina" quality, but it's quality is very serviceable for maintaining its services.
 
Nah, 4K through HDMI even works, only then at 30Hz. If you are in the possibility, could you try the 1440P monitor with HDMI? Good to know that DVI goes up to 1440P at 60Hz
I think I tried using a HDMI-HDMI cable once with the 1440P Dell U2713HM and it limited to HD 1080P resolution which may have been due to the monitor HDMI input rather than the GTX 680 HDMI output. This monitor specs are shown as:

1 x Dual Link Digital Visual Interface connectors (DVI-D) with HDCP
1 x DisplayPort 1.2 (DP)
1 x High Definition Multimedia Interface (HDMI)



The GTX 680 includes this note:
4 - 3840x2160 at 30Hz or 4096x2160 at 24Hz supported over HDMI. 4096x2160 (including 3840x2160) at 60Hz supported over Displayport. Support for 4k tiled MST displays requires 326.19 driver or later.


I will look around and see if I still have any HDMI cables around ... there are several hookup configurations possible between the video card outputs and the monitor inputs ... there may be a combination which works as you wish at 1440P 60Hz. Which end do you need HDMI on?
 
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I just received my Dell 2715Q. I ordered the 2415Q as well. I shipped the 24" back because the 27" is a pleasure to work with. It's nearly as crisp and detailed. If you are at a normal working distance there is nearly no difference at all. The 27" gives you plenty more real estate. My MBP Retina 15" (750GT) handles the 4k with ease. I prefer to use scaled 1440p at the moment. No issue at all. Text is nearly as crisp as with 1080p. Great choice and perfect combination for any retina Macbook.

But don't forget to plug in you magsafe! I forgot it the first time and was wondering why the clamshell mode wasn't working :D. I was too exited at the beginning I suppose.
 
Thinking of purchasing 2715Q. Hoping guys will help me out?
Anyone is using the monitor with Macbook retina 15", late 2013 (Intel Iris Pro)

– Will the combination of Mavericks(no intention of upgrading) & late 2013 Iris pro support 60hz?
 
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Thinking of purchasing 2715Q. Hoping guys will help me out?
Anyone is using the monitor with Macbook retina 15", late 2013 (Intel Iris Pro)

– Will the combination of Mavericks(no intention of upgrading) & late 2013 Iris pro support 60hz?

I am also having the same device and would love to get a 2715Q monitor but I need some input for the 60Hz.
 
Thinking of purchasing 2715Q. Hoping guys will help me out?
Anyone is using the monitor with Macbook retina 15", late 2013 (Intel Iris Pro)
I can offer that Apple's web page (link by MCAsan, above) does not - in error - include the late-2013 rMBP, despite my informing them that that Mac does support 4k @60Hz, specifically the model with a dGPU. Buried in this thread I offered that my rMBP drives two P2715Q displays @60Hz via mDP>DP cables. But....

– Will the combination of Mavericks(no intention of upgrading) & late 2013 Iris pro support 60hz?
You'll likely need to upgrade your OS; I was on Yosemite before the Dells arrived. FWIW, my rMBP drove one of the Dells with 10.10.2, but now can drive two starting with 10.10.3.
 
Hi, is screen grainy on P2715Q, especially on white background? I've P2415Q now, graininess is killing me, wondering about upgrade to P27. Thanks!
 
I can offer that Apple's web page (link by MCAsan, above) does not - in error - include the late-2013 rMBP, despite my informing them that that Mac does support 4k @60Hz, specifically the model with a dGPU. Buried in this thread I offered that my rMBP drives two P2715Q displays @60Hz via mDP>DP cables. But....


You'll likely need to upgrade your OS; I was on Yosemite before the Dells arrived. FWIW, my rMBP drove one of the Dells with 10.10.2, but now can drive two starting with 10.10.3.

Much prefer not to upgrade. I read something via discussion.apple.com mavericks might be able to drive the monitor. There isn't any test unit at my local dell store. I just want to be very sure before I purchase.
 
Ever since upgrading to 10.11.2 I've have the sleep/wake issue with my two 2715Q's and nMP. I was running without any sleep/wake problems before that for a long time (I purchased these monitors in February).

I've come up with a fairly obvious but simple solution that seems to be working, until they fix OS X again: Disable sleep for the displays.

In Energy preferences, I set the display sleep time to "Never", and instead I'm just shutting the monitors off with the power buttons when I'm not using the system. I also have a screen saver set.

It's better then coming back to my machine, not being able to see anything at all, and having to SSH in from my MBP to reboot it, losing any work I had open.
 
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I have the rev A03 version of the 2715Q and a 2015 rMBP and have issues coming out of power save mode. I have to open and close my MacBook's lid (I normally use it in clamshell mode when connected to my external display) to get the monitor working, it's not the worst thing, but it's annoying. I thought A03 was supposed to fix all these problems? Anyone else having the same issue?
 
I've got an A03 but have had my fair share of issues already. I got my first P2415Q from amazon on Christmas Eve, but it arrived very strangely defective, where it'd work fine for about 15 minutes and then go all out crazy. This was my post about it on hardforum:
Welp, I got my P2415Q in the mail about an hour ago. Set it up, ran through a few games of Battlefront before firing up Premiere Pro - not 20 minutes into use I started getting horizontal lines, glitching, and then it popped to black with the glitched desktop image fading away slowly, lines and all. This is Displayport into a 980 Ti which works fine on other monitors, albeit not 4K.

Tried it with my retina MacBook Pro 15" and same issue with the included mDP to DP cable. Lines, glitching, popping in and out of black, and then finally it'll just go "No DP cable" but the image of the desktop will be faded and glitched in a small portion of the display towards the right side.

Here's a small video of the issue on my MacBook.

And here's a crappy cell phone image of once it decides there's no cable plugged in. This image persists whether I pull the cable out or leave it in.
http://i.imgur.com/dtaeipn.jpg

I got this through Amazon and they're sending me a replacement, but it's gonna be six days before I see it. Brutal. I was planning on using this time to test and see if I wanted to return and get the 27 incher or not.


:edit: So with some further testing, if I power the monitor off and let it sit for a while, coming back to it results in a perfectly working display. After about 5 minutes, the screen flashes in the center, and becomes TWO images on the left side (see this image: http://i.imgur.com/EC9tfDH.jpg), ONE image on the right side, all melded together by this corruption-y looking horizontal line-filled dark area in the center where it fades together. The timeline of cooled-down unused monitor to distorted half-double image is identical every time.

Switching to MST modes does nothing to alleviate, nor does powering on and off everything. Eventually, the OSD firmware menus become distorted too.

Has anyone seen this issue at all? It's an A03 model. I haven't been able to find anything digging around the web.

So my replacement came in today and while it's great, when the screen is displaying something dark or black, there's a big yellowish splotch from the bottom right power button area up to the top of the row of buttons, extending the same distance horizontally. It looks like backlight bleed, but it's a weird yellow color. It doesn't show up on anything but black, but dark content and stuff with crop bars it's very obvious. Should I cut my losses here considering I have no dead pixels? It seems like a nice monitor aside from a little extra ghosting (compared to my old 2407WFP) and a lot of GPU demand, but I'm wondering if I should look at other manufacturer's offerings in the $400-600 range.
 
Just set up my P2415Q. It is my first external monitor. Using it with MBPr 2014, 13-inch, regular graphics. After playing around a few hours with resolutions on SwitchResX, the best in terms of crispness and size is 1680x1050 at 51Hz, HiDPI. That's the highest HiDPI option I have available. Does this square with other people out there? I don't fully grasp these resolution numbers but want to make sure I'm on right track.

Also just noticed this resolution I'm using is 16x10, thus I'm losing a little real estate. I tried clicking on the companion 16x9 option but wouldn't let me click on it. Is this a function of clamshell mode or is there some setting I need to find?

UPDATE: Now able to get 1920x1080 @ 51Hz HiDPI. Much better.
 
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Ever since upgrading to 10.11.2 I've have the sleep/wake issue with my two 2715Q's and nMP. I was running without any sleep/wake problems before that for a long time (I purchased these monitors in February).

I've come up with a fairly obvious but simple solution that seems to be working, until they fix OS X again: Disable sleep for the displays.

In Energy preferences, I set the display sleep time to "Never", and instead I'm just shutting the monitors off with the power buttons when I'm not using the system. I also have a screen saver set.

It's better then coming back to my machine, not being able to see anything at all, and having to SSH in from my MBP to reboot it, losing any work I had open.

I've been having a bad sleep/wake issue as well. Specs:

rMPB Mid 2015 (with M370X) running 10.11.2, driving a P2715Q A01 via the supplied cable with DCC/CI disabled.

The display does not wake from sleep after only 2 minutes or so. When I wake the MacBook, it knows a second monitor is connected, and the Dell comes out of sleep mode (but displays black only). Once I've entered my password, I can hit Cmd+F2 to Detect Displays and it works fine. Is it worth returning it, or waiting for an OS X upgrade? Am waiting on a third-party cable to see if that's the issue.
 
I have a early 2015 retina macbook pro and using this display and overall it lags specially with scrolling if I scale it to 2560 or above.

Does anyone have this problem as well?
 
Are you running your MBPr in clamshell mode or is it powering both its screen and the Dell?

Powering both Screen and Dell. I've identified the problem as being very laggy if I use the application in full screen so if I shrink the canvas of the window I'm working, then there's no lag. It seems OSX is repainting the whole screen again and again every time I scroll thus making it very slow.

Can someone test to open Chrome full screen or other application and try to scroll to see if there's lag?

Thanks
 
Hi, I own a late 2013 13" rmbp. I cant decide between the 24" or the 27" version due the fact that I know my MacBook can only run them at a maximum 50HZ HIDPI setting of 1080p with SwitchResX, this would be fine on a 24", but I fear would look too large on a 27", a size which I'm used to viewing at 1440p. Does anyone have any pictures of the 27" running at 1080p HIDPI with ui elements on the screen so I can get an idea of how large this will appear?

Also as an alternative is it possible to get the 27" running at its native resolution at 50hz, and would this look too small? Any help and advice would be much appreciated, thank you.
 
Has anyone seen these two monitors side by side? I have the P2415Q and got it because of the higher pixel density, but does the P2715Q look noticeably less dense and leaning away from the "retina" look? I feel like 4K at this size(160ppi?) is just barely enough to give me that effect, but it looks amazing. I just think every day about what the difference is like with the upgraded few inches and I'm still within the return period on Amazon.
 
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Just ordering a Dell P2715Q. I have a late 2013 i7 rMBP with the nVidia GeForce GT 750M 2048MB Graphic. I presume I will be able to run the Dell at 60Hz with that and run my current Thunderbolt display too. is that correct? I am also getting the OWC Thunderbolt 2 port replicator/dock, will I be able to feed both monitors through that? Looking for neatest connections and 60Hz on the 4k display.
 
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