I run it at scaling sometimes for certain applications or if I temporarily need more space. However if you're not running it at (2x) 1920 x 1080 most of the time, there was no point in buying "this" 4k display.
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Dell P2715Q and P2415Q 4K IPS Displays
- Thread starter VirtualRain
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Just wanted to share some images illustrating my earlier post about the P2715Q display.
1. Blurriness at 1440p: When running at 1440p resolution, due to the upscaling, you can notice blurriness caused by "half pixels". Open the image below at 100% and take a look at Gmail's "Compose" button: you will see that the top and right borders are slightly fuzzy, while the bottom and left borders are sharp. This is because some elements, when they're scaled to this resolution, fall on half-pixels. It's more noticeable on small elements than large (e.g. small shapes, small text). Apparently this is an issue with all 27" 4K displays for Mac: https://bjango.com/articles/macexternaldisplays/
2. Misaligned LCD panel placement: In these pictures, take a look at the black unlit band that surrounds the display before the plastic frame starts: it is not consistent throughout. It looks like the panel is slightly shifted to the left and slightly angled downward towards the left. Is this a cause for concern? Do you see this on yours?
1. Blurriness at 1440p: When running at 1440p resolution, due to the upscaling, you can notice blurriness caused by "half pixels". Open the image below at 100% and take a look at Gmail's "Compose" button: you will see that the top and right borders are slightly fuzzy, while the bottom and left borders are sharp. This is because some elements, when they're scaled to this resolution, fall on half-pixels. It's more noticeable on small elements than large (e.g. small shapes, small text). Apparently this is an issue with all 27" 4K displays for Mac: https://bjango.com/articles/macexternaldisplays/
2. Misaligned LCD panel placement: In these pictures, take a look at the black unlit band that surrounds the display before the plastic frame starts: it is not consistent throughout. It looks like the panel is slightly shifted to the left and slightly angled downward towards the left. Is this a cause for concern? Do you see this on yours?
Took delivery of one today, also connecting other 4k displays to iMPs with this as well.
Accell USB-C to DisplayPort Cable
Hi iamfredrik,
I'm having similar issues to you trying to wake my Dell P2715Q monitor up after my rMBP (Early 2015) has slept overnight. I'm using my rMBP in clamshell mode and I'm also using the dp cable that came with the monitor and have just installed macOS Mojave but has not improved the situation.
Interestingly enough, if I open the clamshell (lift the lid) on my rMBP the P2715Q magically wakes up and the display comes on.
Did you manage to find a solution to this issue?
Hi everyone,
My P2415Q was persistently dropping to 30 fps (like every 2 weeks, stayed 30 fps for 2-3 days), I thought it was a MacOS bug, restarting the monitor didn't help either - Recently noticed it was happening on Windows from a different cable/input too, so it was a monitor issue
Solution: Disconnect + Reconnect the monitor - Apparently doing it from the power button doesn't really restart the monitor
My P2415Q was persistently dropping to 30 fps (like every 2 weeks, stayed 30 fps for 2-3 days), I thought it was a MacOS bug, restarting the monitor didn't help either - Recently noticed it was happening on Windows from a different cable/input too, so it was a monitor issue
Solution: Disconnect + Reconnect the monitor - Apparently doing it from the power button doesn't really restart the monitor
Hi all.
Just got the P2415Q for my Mini 2014 late.
The display is amazing. Would anyone point me to or share their settings?
1080p HiDPi looks stunning.
4K settings:
This 4K setting is great, but I would like something between 1080 and 4K. The offered options are blurry low res.
I'm looking for 2560x1440 ideally. Cheers.
Just got the P2415Q for my Mini 2014 late.
The display is amazing. Would anyone point me to or share their settings?
1080p HiDPi looks stunning.
4K settings:
Code:
Pixel Clock 450MHz
Active 3840x2160
Front porch 15 - 1
Sync width 64 - 3
Back Porch 79 -13
Frq (auto filled) 112,556 - 51,702
Horizontal positive syncThis 4K setting is great, but I would like something between 1080 and 4K. The offered options are blurry low res.
I'm looking for 2560x1440 ideally. Cheers.
Second display arrived today, spent a good few minutes checking both and they seem to be dead pixel free!
With regards to my 2014 MBPr 15" i7 running both monitors I can also confirm that they can run the internal display at the maximum resolution including both external displays at full resolution 60Hz absolutely fine!
Now debating if I should order a TB2 PCIe enclosure, I have a bad feeling with this introduced into the mix that both displays won't work at 60Hz!
Did you have any issues running 2 x 4k monitors with the internal display on?
Have you tried adding an additional screen using the HDMI port?
Thing is, am planning to expand my mid-2015 15" mBP (R9 M370X graphics) on a different setup.
- 2 x 2k/1440p monitor (via Thunderbolt2 to DP/HDMI)
- 2 x 1080p (via HDMI to HDMI, USB3.0 to HDMI)
- internal display on
That's very odd. I own that same display—and you're right, it's 4k, not 5k. I checked it on both a 2019 i9 iMac (Monterey 12.7) and an M1 MBP (Ventura 13.6), and it reports correctly on both (screenshot from iMac shown below). Not sure what's going on with your setup. What OS are you using?
Just as a general point of interest: when I switch that display to the M1 Pro MBP, I lose the Framebuffer Depth, Display Serial Number, and Connection Type I see on my iMac. Your M1 Max MBP does the same. I wonder why the Apple Silicons machine don't get and/or display that info.
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I'm on Ventura 13.6. Not ready to upgrade to Sonoma yet.
Ya that info would certainly be nice to have! I don't remember what those showed back on my old Intel MBP, don't have it anymore to check :-/
It's curious you have that bug, because I'm running the same OS as you (Ventura 13.6) (earlier I wrote "Ventura 12.6", but that was a typo), and the same generation of Apple Silicon MBP (M1), yet mine displays correctly. The only difference is that I have an M1 Pro, while you have an M1 Max.
I wonder if it's getting confused because you've got four of them plugged in, half at 2:1 and half at 1:1. Just as a test, try doing this: Unplug all of them, reboot, and plug in just one. Then see what you get.
P.S.: I noticed you only have 12 GB available on our 1 TB SSD. You might want to consider offloading some of your less-used files to an external drive. IIUC, SSD's don't like to be that full. I think ≲ 70% is ideal. Or at least do the experiment and see if the performance improves.
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Ya I know.. I need to clean up and/or get an external drive lol. Uninstalling some games I haven't played in a while should do it...
I have half of them horizontal, and half of them vertical. Maybe that's why, who knows.
I'll try that next time I reboot.
Having just tried this myself, I think it's one of those "it's not a bug, it's a feature" things. My usual setting is a 'looks like' 3008x1692…
Set the resolution to the 1:1 4K and.....
In other words, it's reporting the resolution it's scaling down from, not the actual monitor resolution. Which is both confusing but makes sense- your monitor is getting a 4K signal regardless, the desktop scaling results in a 'looks like' image of whatever you're using, but the retina scaling needs twice the 'looks like' size.
Ugh, I'm too dumb to completely understand this. Definitely confusing and makes sense at the same time. They need different "Hardware Resolution" and "Scaled Resolution" (or something) categories in this case! Imaginably, users would like an accurate report of the hardware resolution in all cases.
I don't think macOS will actually let you set any other hardware resolution, though the P2715Q most definitely supports them. The monitor will always tell you what resolution it's running (in the settings OSD).