Dell Ultra HD 4k Monitor P2715Q 27-Inch Screen LED-Lit Monitor

This monitor was great. 4K looks amazing. I always feel Dell quality control is top notch. There were no dead pixels present, and very minimal IPS glow. Uniformity looked great out of the box, and after playing around a bit with the color settings, it looked perfect (in my eyes). For the price, nothing compares.I ran it on a single 980 GTX, and gameplay wasn't as bad as people hype it up to be. I know there are those who can't stand any stuttering or whatnot, but if you're mostly playing games that aren't heavily dependent on having perfect response times (i.e. FPS or fighting games, or if you're doing something like heavy competitive GTA V battling or whatever), you probably won't mind. I tested a few games (Arkham Knight, GTA V, Tomb Raider, Bioshock Infinite, Shadows of Mordor, Fallout 4, League of Legends, Heroes of the Storm, Diablo III) on mixed settings between High to Ultra, and they all ran acceptable to me. Especially when you play a game to soak in the beauty of the scene, it's excellent.There were 2 things I had a grip with. One had nothing to do with the monitor itself, but more to do with the problems remaining with 4K. The scaling isn't perfect, and some games don't scale well. Bioshock, for example, when run in 4K, would not upscale the text, so everything was very tiny. And in League of Legends, the Windows 10 scaling feature would cause all the text in the game to be overly enlarged, to the point that some numbers would overlap each other. The other problem was the DisplayPort issue where, when the monitor went in standby, it would reset the desktop resolution to 640x480, which would screw up my icon placement, window sizing, as well as shift all my programs from my secondary monitor back onto the main monitor. Also, turning it off would result in my secondary monitor becoming primary. I could not figure out how to fix this, as the registry modification tip didn't work on this one (it worked on my LG 34UM95).With all that said, I decided to return the monitor. I'm sorry I didn't take any photos of the screen in action before I boxed it up. I know i gave it 5 stars, but the decision to return had nothing to do with the monitor itself. I just found myself to be more preferential to a higher clocked monitor (144hz+, gsync) at this point right now, so I decided to go with the XB271HU that was released last month. Though I wouldn't have replaced it for any other monitor if I didn't have the extra $300 the XB271HU cost. 4K was beautiful, and I still prefer its appearance over the XB271HU's 1440p. Maybe I'll go back to 4K once scaling is done right and they start making faster response panels (and after I buy another card or two to run it, haha).TL;DRGreat monitor, no issues with the panel. Ran acceptable for those who have never used a faster response monitor (TN, 144hz, gsync, etc). Enhanced gameplay experience (beautiful). Had DisplayPort power issues, not a huge gripe. 4K scaling issues still present on some games. Decided to return for the Acer XB271HU, which cost $300 more, because I prefer 144hz (165hz OC) and gsync at this time. If my budget was firm around $500, I would have definitely kept this one.

I'm running this via DisplayPort, off a late 2013 Macbook Pro with Nvidia GT 750m discrete graphics, 16 GB RAM and 1 TB SSD. My OS X version is: Mavericks 10.9.5.In general, I'm very particular about monitors and LCD's. So, I wasn't expecting too much with this monitor and only bought it out of necessity..needed the extra real estate for web development. The built-in 15" LCD on the macbook, while fairly nice after calibration, is both super reflective and way too small, and these two factors added with my poor vision, gets to a point of severely diminishing productivity after some years.This monitor is utterly fantastic. I've owned several SGI 1600SW flat panels, which back in the day, cost $3000 (!) a piece. This feels exactly like a 1600SW, except modern-er and better-er.No sleep or wakeup issues either. Of course, you have to calibrate it (use advanced settings when calibrating via display control panel) and also futz with color modes on the monitor, etc.My settings:Monitor: custom color preset (no further mod), with brightness about 27 and contrast 49.OS X: calibrated profile, 6500K during day and f.lux at 5000K during evenings.===Update 1: Display did not wake up after sleep. (I'm running in clamshell mode, with the Dell being the only active display). After the computer went to sleep overnight, I hit the keyboard/mouse this morning and the display didn't show any content. Weirdly, the power button on the monitor was constantly on (not pulsing) even though there was no content. Pressing/holding down the power button didn't do anything (couldn't turn off the monitor). I had to power cycle the monitor off the power supply and futz with the displayport cable (unplug,plug) etc a few time for this to work.Apparently, this is a known issue. I have the rev A02 panel by the way, which was made in March 2015 if I remember correctly (I ordered from amazon in November and received about a 6 month old panel).So, I 've set the macbook to never sleep and will turn on/off the monitor at night manually. I'm hoping this strategy will work. Still 5/5 for the monitor itself, great LCD but some firmware bugs still present in rev A02.Update 2:To get reliable sleep/wake, I first turn off the monitor (so the only display is the laptop), then sleep the laptop. Wake up is the reverse sequence. Using 'Display Maid' to remember all my window positions and it works like a charm.Update 3:I bought another one of these (from Dell directly this time). Two of these will not work connected to the two displayports at the same time. However, works great with one on the displayport and the other on HDMI. Was worried that HDMI (due to lower refresh rate) would have massive cursor lag, but I can't see any cursor lag (at all) or any difference between the displayport and the HDMI. Very happy with this setup.I'm using both these monitors at 1920x180 mode (which is effectively the 'Retina' pixel doubled mode).