Dell U2412M - 16:10 IPS without Breaking the Bank
by Chris Heinonen on February 28, 2012 9:00 AM ESTDell U2412M Input Lag and Power Use
For testing lag, I am trying a new solution to our previous testing method. I’m trying out SMTT, which is designed specifically for measuring lag in LCD displays. Using DirectX it manages to push over 1,000 frames per second to a display, allowing for millisecond accuracy instead of relying on time demos that often run well below that threshold. Using this method, we can actually determine two different values: The input lag for the LCD to initially respond, and then the total lag from when the new frame is received to when it is completely drawn and at full brightness. This last one is the overall important value, as it is what gamers would be most concerned with. It’s important to have as low an "input lag" as possible so that even if the screen isn’t fully drawn yet (the pixels will be changing over) you will be able to begin to get that feeling of responsiveness.
Here we see that the overall lag value measured OK, at 17ms. The input lag, which was also measured, was just under 2ms, which indicates that the Dell responds very quickly, and then it’s just a matter of the pixel response time. One thing to keep in mind here is that the 17ms response time is the total time from input to peak brightness, and then it takes 15ms to fall back to another value. When I actually look at the test subjectively and not objectively, you can certainly see the change in the pixel after 7-8ms of time. So I could report it as 8ms of lag, as that’s about what I think you would experience in a real world situation, but the worst case scenario seems to be 17ms, which is what I’m choosing to report as that’s the objective number.
The CRT still comes in perfect, and that’s what the LCD should aim to do; picking a number that gives a better result, even if it might be more applicable to the real world, feels like cheating. Perhaps we will get a future display technology (like OLED or CrystalLED that I saw at CES this year) that will bring us back to CRT response times, but until that happens I’m going with the objective, worst case measurement. I will report the “real world estimate” along with it, though, so you can use that for your own judgment. Please let me know what you think of this in the comments section.
I made the assumption that with a larger panel and the 300 nits of light output that the Dell would not be the most eco friendly panel I had seen. Happily I found this to not be the case. It drew just 36 watts at maximum brightness and only 16W at minimum brightness, less than even the 23” Dell U2311H from last year. I don’t know if it is more efficient LED lights, or a more transparent panel that allows more light through, but Dell did a good job keeping the power use low on the U2412M.
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kchase731 - Thursday, March 1, 2012 - link
I have 2 of these side by side on my desktop. I bought them for $299 ea. free shipping. im very very pleased with them. I replaced 2 aging dell 2405's and these look really good. Im not a graphic designer or developer or gamer, i use them for work I like having the desktop real estate and these accomplish that well, maybe not perfect but like i said im not a designer and they seem very good for the money. i used a colorimeter to calibrate them, they seem accurate and crisp, im very happy with the purchase, and am strongly considering adding a 3rd.mike8675309 - Thursday, March 1, 2012 - link
Get this resolution into a 21" display and have it be at least as good as this and I'd buy a pallet of them to hold me over until retirement. At a 24" size, I'll just take two as it really is just too big to be perfect. As a software programmer (more actual code, less pretty widgets) those extra lines of resolution are valuable.Now if the company I'm working for today would just let me buy my own monitors.
Mithan - Thursday, March 1, 2012 - link
I purchased this monitor back during the Black Friday sale they had in November and I love it.It sits next to my Dell 2407WFP which I love as well and replaces some crappy 24" Samsung TN panel that died on me.
My only complaint with the LCD is that the vertical viewing angle isn't as good as the 2407WFP.
However, for heavy gaming and web browsing, it has been an excellent LCD and I am tempted to buy a second to replace the 2407 that is taking longer to reach full brightness than it used too.
Its a kick ass LCD, especially for $300. I would recommend it to any gamer in a heart beat that doesn't want a crappy TN panel but doesn't want to spend $500 either.
mtoma - Friday, March 2, 2012 - link
I also thought that 120 Hz is good for movies, I even bought an LG and I watched movies in 120 Hz, for that reason only. Well, the movement scenes are .. uncanny, the feel like I watch some theatre piece, are toooo fluid. The action/movement scenes feel rushed. Too rushed. And, it makes sense: the movie, released to users in 23-24 frames/second, looks best on lower refresh rate panels.Of course, in other desktop applications (games, Internet, office apps), that refresh rate does not ruin the experience, it is ok. But in movies... no way, no way.
On the subject of panel-integrated webcams, I agree that they suck. But, I believe that in smartphones (the expensive ones - Nokia Lumia 800 for example) they don't suck, actually are pretty good. So, I feel that desktop enthusiasts deserve the best technology possible. I really think that with a bit of effort, the PC world can match and even surpass the Apple world in technology and design (the design and the component consolidation are the reasons I wish a good integrates webcam in LCD-s/OLED's).
sethsez - Thursday, March 8, 2012 - link
You're wrong about movies. Unless there's some interpolating going on (which might very well be the case), 120 Hz should be significantly BETTER for 24 FPS material than 60 Hz.The thing is, 24 doesn't divide evenly into 60. So you wind up getting unevenly repeated frames in order to match the monitor's refresh rate. Meanwhile, with 120 Hz you can repeat each frame 5 times and be done with it, ensuring an equal level of time between each unique frame.
What you saw was almost certainly interpolation, in which the monitor actually attempts to create new frames in between the original ones. It looks like garbage and has given 120 Hz a bad rap it doesn't deserve.
woodelf - Friday, March 2, 2012 - link
Here's my problem with this review and others (of both this monitor and others): I have no basis of comparison. Other than the Apple monitors, I have never even seen an 8-bit IPS monitor in person. And the last time I got to play around with an Apple display enough to determine how the color was (not as good as my CRT) was 2-3 generations ago. Best Buy doesn't stock anything but crap for monitors, and ditto for every other store I've managed to get into. Likewise, work monitors are (1) all cheap Dells and (2) running XP and ugly custom-built software, and I'm not doing any design work on them in any case, so I don't have anything to really judge against.Unfortunately, all I know from reviews is that S-IPS > eIPS > TN, and TN isn't good enough for my eyes. What I *do* know is CRT monitors (I'm a little behind the times). So, can anybody compare the color fidelity of an eIPS to a quality CRT (ideally my slowly-dying Sony GDM-FW900)? I get that S-IPS or H-IPS would definitely be preferable, and I suspect I could see the difference, at least in some circumstances. But this monitor is much more comfortable for my budget, so if it's "good enough", the sacrifice in quality is probably worth it to me. From looking at screenshots in reviews, I really can't tell the difference between a well-calibrated U2412M and U2410--but I don't expect that is representative of actually sitting in front of the monitors.
GullLars - Saturday, March 3, 2012 - link
I've been using this as one of 3 monitors for 8 months now, and i'm very happy with it.My main monitor is a Dell Ultrasharp 27" (2560x1440), and i have this U2412M and another monitor in portrait mode (flipped) on either side. Upgrading from two old TN monitors, 1x 24" 1900x1200 and 1x 22" 1680x1050, using the new configuration is great.
Using these U2412M vertically for reading documents and web sites are great. It gives a much more "roomy" feeling.
jiffylube1024 - Sunday, March 4, 2012 - link
I've got the Dell Ultrasharp 709W -- it's a 16:10 27" LCD with a 1920x1200 panel. If they did a 27" 1920x1200 eIPS for a cheap price (<$500) I'd get it in a heartbeat, and I'd bet it would be a huge seller.kunstderfugue - Tuesday, March 6, 2012 - link
Something i don't understand is: How is 16:10 better than 16:9? In the end, it's only 120 more lines; and i don't see how that makes for a better experience.woodelf - Thursday, March 15, 2012 - link
It's not just 120 lines, it's also an inch (or so, depending on the overall monitor size). In the case of a 24" monitor, that extra inch makes it possible to see an A4 or letter-size two-page book spread at actual size, and still see your menu bars. In fact, the 16:10 aspect ratio is almost perfect, with a little room on one side for some pallets or tool bars.