Dell P2715Q and P2415Q 4K IPS Displays

[dagamer34]

Just for giggles, I bought a mid-2014 15" Retina MacBook Pro with Nvidia GPU and it can indeed drive 2 4K displays in addition to the internal 2880x1880 display. However, the fan is somewhat audible as soon as the 2nd 4K display is plugged in. It wasn't dropping frames, but the system sure wasn't happy to be driving so many pixels at once.

Perhaps a rMBP upgrade with a GTX 960M would far better.

 

[wakele]

Interesting.

So on this Dell P2715Q, any idea why in SST mode all resolutions are blurry, and why in MST mode only some resolutions work fine? For instance 1920x1080 @ 30hz shows retina style quality on the Dell (but it's too big), anything higher I try (2048x1152, 3200x1800) says "(low resolution)" and it's all blurry again (except for the max 3840x2160).

Ideally I'd like something like 3008x1692 @ 60hz. Is the new MacBook Pro 13" going to help?

Thanks again, learning a lot!

I said that in this thread before, you can try to change the "display->sharpness" value in the OSD of the monitor. Values of 60 and 70 are enough to see no blurry image when choosing other resolution than native. For me it works, and it is a big difference with the default value, 50. Go back to 50 for native, or it looks too sharp.

 

[expntly]

I said that in this thread before, you can try to change the "display->sharpness" value in the OSD of the monitor. Values of 60 and 70 are enough to see no blurry image when choosing other resolution than native. For me it works, and it is a big difference with the default value, 50. Go back to 50 for native, or it looks too sharp.

Yes but no I had actually tried this and this seemed like a hack -- the effect wasn't much better.

 

[siqueiros]

I said that in this thread before, you can try to change the "display->sharpness" value in the OSD of the monitor. Values of 60 and 70 are enough to see no blurry image when choosing other resolution than native. For me it works, and it is a big difference with the default value, 50. Go back to 50 for native, or it looks too sharp.

Personally i am don't like dell sharpness value over 50 at any resolutions, it is look very sharp even at 60. Only default 50 is good for me.

 

[alasota7]

Can anyone help me out?

The price for the P2715Q and the P2715H (the 2560x1440 res screen) are the same. I would love to be able to use the P2715Q with my mid 2009 Macbook Pro 17" before I purchase a new 5K iMac in the near future (few months) and use it as a second screen.

Quick question, will the P2715Q display work at 2560 x 1440 on a Mid 2009 Macbook Pro 17" (it has the additional 512mb Geforce 9600M gt) through the mini display port?

I know that audio will not work through the port, but I am not sure if the mini display port which I believe is version 1.1 will work with this display with 1.2 displayport. Main reason I am asking is that in the future I would like to use this display on a 5K iMac.

 

[JTToft]

Can anyone help me out?

The price for the P2715Q and the P2715H (the 2560x1440 res screen) are the same. I would love to be able to use the P2715Q with my mid 2009 Macbook Pro 17" before I purchase a new 5K iMac in the near future (few months) and use it as a second screen.

- I'm going to say that it probably won't work - at least not well. But that's pure conjecture and I might very well be wrong. But you could always buy it and return it if it doesn't work to your liking - or just keep it for your future iMac, where you know it will work, if you were going to buy it eventually anyway.

Assuming you mean U2715H, are those really the same price in your area? I am seeing the 4K at a more than 25 % higher price.

EDIT: Looking on Amazon.com, they are indeed nearly the same. $560 vs. $580. Wow.

 

[Traverse]

- I'm going to say that it probably won't work - at least not well. But that's pure conjecture and I might very well be wrong.

Assuming you mean U2715H, are those really the same price in your area? I am seeing the 4K at a more than 25 % higher price.

EDIT: Looking on Amazon.com, they are indeed nearly the same. $560 vs. $580. Wow.

I've had a lot of suggestions on this forum to get a 4K monitor and run it in 1440p scaled mode, but I don't get why you'd do that.

1) Just like with the Retina Macs, non-native scaling will result in decreased quality of texts and images.

2) It's harder on my the GPU. I have a 15" rMBP that can drive 4K at 60Hz, however, when I run the built in retina panel at a non-native scaled resolution there is a decrease in performance and fluidity. Is it massive? No. But add that extra load to an already difficult to render 4K screen and it could be a big problem.

I'd rather have a native 1440p panel.

 

[lankox]

Personally i am don't like dell sharpness value over 50 at any resolutions, it is look very sharp even at 60. Only default 50 is good for me.

60 is too sharp but 50 is too soft. I would love to be able to set to 55. Too bad there is no way to do that.

 

[aviduser2]

I've had a lot of suggestions on this forum to get a 4K monitor and run it in 1440p scaled mode, but I don't get why you'd do that.

1) Just like with the Retina Macs, non-native scaling will result in decreased quality of texts and images.

2) It's harder on my the GPU. I have a 15" rMBP that can drive 4K at 60Hz, however, when I run the built in retina panel at a non-native scaled resolution there is a decrease in performance and fluidity. Is it massive? No. But add that extra load to an already difficult to render 4K screen and it could be a big problem.

I'd rather have a native 1440p panel.

Disagree. I've had u2713 and p2415q and i sold 27".

The screen is vastly inferior. Reading text is much more fuzzier when you get used to retina scaled. I tried using both, but it was straining for the eyes to read on the non-retina when i had both.

 

[shrigg]

I am using a P2715Q with my mid-2014 rMBP15. Is it possible to daisy chain thunderbolt peripherals out extra displayport jack on the display? I tried hooking some things up to it but they did not respond, wondering if there might be some setting that enables this port?

 

[mikepj]

I am using a P2715Q with my mid-2014 rMBP15. Is it possible to daisy chain thunderbolt peripherals out extra displayport jack on the display? I tried hooking some things up to it but they did not respond, wondering if there might be some setting that enables this port?

It's not possible. The monitor has a DisplayPort connector, not a Thunderbolt connector. The physical connectors themselves are the same, but there is no Thunderbolt controller in the Dell to continue the chain of devices. The monitor needs to be the last device on the Thunderbolt chain.

 

[edry.hilario]

I got in another of these monitors (dell p2515q) more dead and stuck pixels... again dont know if it is you guys dont look around or if im just getting very unlucky but so far it looks like im going to have to look elsewhere... a effin shame because i do like the screen.

 

[mjfutures]

I got in another of these monitors (dell p2515q) more dead and stuck pixels... again dont know if it is you guys dont look around or if im just getting very unlucky but so far it looks like im going to have to look elsewhere... a effin shame because i do like the screen.

Dell has a premium panel guarantee ... they will overnight you a new screen while you keep the defective one ... I wouldn't give up if you like the screen, I don't see a better alternative.

 

[edry.hilario]

Dell has a premium panel guarantee ... they will overnight you a new screen while you keep the defective one ... I wouldn't give up if you like the screen, I don't see a better alternative.

Didnt buy it from dell though.. i bought it through b&H and im afraid that if i do want to return it b&H wont take the original back.

 

[bits]

Can anyone help me out?

The price for the P2715Q and the P2715H (the 2560x1440 res screen) are the same. I would love to be able to use the P2715Q with my mid 2009 Macbook Pro 17" before I purchase a new 5K iMac in the near future (few months) and use it as a second screen.

Found on everymac:
The maximum resolution supported on an external display is 2560x1600.

So you can connect it and run with scaled resolution for some time, just change "Sharpness" in display menu from 50 to 60-70 and everything will looks like native monitor.

I worked some time like this on my early 2011 MBP and after I change sharpness, text is great (with sharpness 50 - it's blurry on scaled res.).

 

[gtjeta]

Wow, I received P2415q yesterday and think it is awesome. Connected to my nMP, best computer and monitor combination ever, by large. I find very good the very reduced reflections with respect to apple displays. I am changing my computers quite often (like yearly), but I think I will keep this combination for at least three years ...

 

[expntly]

Returned the new MB12 and bought the new MBP13, the D2715Q works like a charm at full resolution @ 60hz in miniDP -> DP. Plugged another Cinema Display in the second miniDP port, works just fine as well.

 

[nry0]

I am using a P2715Q with my mid-2014 rMBP15. Is it possible to daisy chain thunderbolt peripherals out extra displayport jack on the display? I tried hooking some things up to it but they did not respond, wondering if there might be some setting that enables this port?

If you go MBPr > TB device > Display it works just fine at 4K 60Hz, see my post a few pages back where I'm running 2x 4K at 60Hz and a Sonnet Echo Express SEL PCIe enclosure! https://forums.macrumors.com/posts/21063581/

 

[tehgregzzorz]

No display on boot D700 but works on D300

I've read a lot of other people online having issues with their displays sleeping through the boot process and waking up at the login screen. I never had this issue on my nMP 3.7GHz quad-core with D300. My displays woke up at boot, showed the Apple logo and I was able to toggle through boot selections like normal (at full 4K, I might add).

I have two Dell P2715Q displays running at 60Hz via DP to mDP cable.

What's interesting is that I just got a new nMP, this one with 3.0GHz 8-core with D700 graphics and when connecting to the same displays with the same cables NOW I have this issue! The displays are asleep through the boot process (which is very annoying)

Has anyone found a solution to this issue yet? Any thoughts as to why I consistently had no problem with my D300 machine but I do with the D700 machine?

Boot rom version and SMC version exactly the same on both (Boot rom: MP61.0116.B11, SMC version: 2.20f18)

 

[edanuff]

Any thoughts as to why I consistently had no problem with my D300 machine but I do with the D700 machine?

If I had to hazard a guess, I'd say you were somehow running in 30Hz mode on the D300 machine. The problem with 4K bootscreens on the nMP is because graphics driver on the ROM doesn't support 4K 60Hz on SST monitors like the P2715Q and you have to wait for OSX to load the driver that does support it. The ROM does support 4K 30Hz SST monitors so if it recognized the monitor as 30Hz, it would work. This is why one workaround people use is to also connect the HDMI port on the nMP, which only supports 4K 30Hz, to the P2715Q in addition to the Display port connection, so that they can toggle the input switch on the monitor to HDMI input and view the bootscreen when they need to option-boot.

 

[tehgregzzorz]

If I had to hazard a guess, I'd say you were somehow running in 30Hz mode on the D300 machine. The problem with 4K bootscreens on the nMP is because graphics driver on the ROM doesn't support 4K 60Hz on SST monitors like the P2715Q and you have to wait for OSX to load the driver that does support it. The ROM does support 4K 30Hz SST monitors so if it recognized the monitor as 30Hz, it would work. This is why one workaround people use is to also connect the HDMI port on the nMP, which only supports 4K 30Hz, to the P2715Q in addition to the Display port connection, so that they can toggle the input switch on the monitor to HDMI input and view the bootscreen when they need to option-boot.

It's odd to me that the D300 machine was able to detect and use the displays at 30Hz and the D700 can't. I guess I could go for that work around :/

 

[rdav]

If I had to hazard a guess, I'd say you were somehow running in 30Hz mode on the D300 machine. The problem with 4K bootscreens on the nMP is because graphics driver on the ROM doesn't support 4K 60Hz on SST monitors like the P2715Q and you have to wait for OSX to load the driver that does support it. The ROM does support 4K 30Hz SST monitors so if it recognized the monitor as 30Hz, it would work...

The next nMP(7) is overdue and it REALLY needs to have some updated GPUs, & HDMI-2 etc. Plus, better (4k@60Hz) driver /software support from the upcoming OS-X 10.11(Mojave). Perhaps there will be some good news on all this at WWDC/2015 next month.

 

[edanuff]

It's odd to me that the D300 machine was able to detect and use the displays at 30Hz and the D700 can't. I guess I could go for that work around :/

What about when you go to Graphics/Displays in System Information and select the Video Card, does it show the same ROM Revision, gMux Version, and EFI Driver Version? IIRC, the D300 and D700 are different AMD GPU architectures, so the driver might be quite a bit different. All I can personally vouch to is that the D500 does have the same lack of 4K SST bootscreen as the D700.

----------

The next nMP(7) is overdue and it REALLY needs to have some updated GPUs, & HDMI-2 etc. Plus, better (4k@60Hz) driver /software support from the upcoming OS-X 10.11(Mojave). Perhaps there will be some good news on all this at WWDC/2015 next month.

That would be nice but so would a simple firmware update. They've come a long way with the 4K and even dual-cable 5K support in Yosemite, but I keep hoping the bootscreen fix will be in the next update.

 

[edry.hilario]

getting my third p271q lets see how bad this one is.. Am I really the only one with the dead pixels problems? or you guys just don't look?

 

[rdav]

..They've come a long way with the 4K and even dual-cable 5K support in Yosemite, but I keep hoping the bootscreen fix will be in the next update.

Perhaps we'll also be shown an nMP(7) running 3x Apple/5k screens (based on the iMac/27"/Retina) @WWDC/2015. Technically, not that much of a reach. And four years is already a looong time to wait for a monitor update. [https://www.macrumors.com/roundup/displays/]