To perform these tests, we use a high-speed camera that shoots at 1,000 frames per second. Analyzing the video frame-by-frame allows us to observe the exact time it takes to go from a zero-percent signal to a 100% white field.
The pattern generator is placed at the base of the monitor so our camera can capture the precise moment its front-panel LED lights up, indicating that a video signal is being received by the monitor. With this camera placement, we can easily see how long it takes to fully display a pattern after pressing the button on the generator’s remote. This testing methodology allows for accurate and repeatable results when comparing panels.

ViewSonic wins the response time comparison by two milliseconds over the others. And although it still lags behind most TN-based monitors, it does show an improvement in IPS technology. Conversely, Samsung trails the pack in this metric. Now, let’s look at the signal lag measurement.
Keep in mind that this is measuring total lag, with the pixel response time factored in. Of course, your actual mileage will vary depending on the hardware and software configuration used. But because we’re using a pattern generator, we can eliminate these variables.

Samsung moves up in the ranking with its lower input lag time. The AOC screen we tested in AOC I2757Fh And ViewSonic VX2770Smh: Two 27" IPS Monitorsis still on top, but the two screens in this review are only slightly behind. When looking at results from the TN-based monitors we’ve tested, we see these latest IPS panels are inching closer in speed. Their response time is within two or three milliseconds, making that comparison a practical wash.
Input lag is generally greater on IPS-based displays, though not by much. Moreover, it's not simply universal that any given TN panel is faster than any given IPS panel. Ultimately, you need to have extremely fast reaction times to be held back by any of these monitors.
- ViewSonic VP2770-LED And Samsung S27B970D
- Test Setup And The S27B970D's Unique Features
- Results: Stock Brightness And Contrast
- Results: Calibrated Brightness And Contrast
- Results: Gamma And ANSI Contrast Ratio
- Results: Grayscale Tracking
- Results: Color Gamut And Performance
- Results: Viewing Angle And Uniformity
- Results: Pixel Response And Input Lag
- Is QHD (2560x1440) Right For You?
It's coming. We're ramping up our display coverage, so we took note of the requests after the last display piece and put in the requests. You'll see this soon. Of course, if there are any other requests from you guys, do let us know. Christian is doing a phenomenal job of applying his extensive experience on Tom's Hardware.
Everything gets smaller.
So increase the DPI scaling ?
Everything gets smaller.
So increase the DPI scaling ?
Agreed. I bought a Dell U2711 a few months ago, but if something forced me to replace it, I'd probably go with one of those cheap Korean panels -- or a TN panel 2560x1440 monitor if somebody would actually make one - I doubt I'm the only one who likes the resolution but isn't so picky about color quality. I had no objection to the color quality on my Samsung P2770HD, and the color shifts of a TN panel are affected by the physical size of the monitor, not the resolution, right?
It's coming. We're ramping up our display coverage, so we took note of the requests after the last display piece and put in the requests. You'll see this soon. Of course, if there are any other requests from you guys, do let us know. Christian is doing a phenomenal job of applying his extensive experience on Tom's Hardware.
That's great to hear, I agree with the others that the price of these models is too much to consider unless they were generating $$$s for me. $3-400 seems like the range I would be willing to spend on these. And as for the USA based korean cheap models, are there any legit retailers of these? Please point me at them.
Here are the inexpensive $300-$400 27" korean monitor brands: Yamakasi Catleap, Achieva Shimian, Crossover, PCBank, Potalion, Auria
"The reason these monitors are cheap - LG makes IPS panels for apple cinema displays. Apple only accepts grade A+ panels. That means the all the grade A,A-,B+, etc are not accepted and returned to LG. LG resells those IPS panels to other manufacturers. You can get the whole story on google if you're interested. In addition, you're getting no support and no manufacturers warranty."
Source: http://www.mmorpg.com/gamelist.cfm?game=239&view=forums&post=5192222#5192222
It would be really interesting to get a review of these monitors that go for 50% or less of the price of the Big Brand stuff. If it's even 85-90% quality compared to the big brands, then they are worth the plunge.
Don't forget the Auria at Microcenter. Many Toms users, myself included, have them.
Both 60 HZ
No need to read any further.
I just dont see QHD picking up any traction in the main consumer market until they get prices down to reasonable levels.
Heck I can pick up two 1080p 23/24 inch panels for
Even with my recent resolution, I experienced some hard time to adjust myself when gaming is involved. The HUGE screen about 60 inch from my eyes still hurts my respond. I'm too focused on what happen on the middle of the screen and never had a chance to look at details on corners, when I do, it's already too late...
I don't think I'm ready for such resolutions, even if someday my rig is.
I have the Dell U2711 also. Im a very visually detailed person. Audio I cant tell the difference between low to mid, or mid to high end systems... but visually I notice. My friends and family dont notice visual details or color accuracy. They think my monitor was a waste of money, but I dont. You need to know yourself before making a purchase on these. Also, if your gaming, you'll need a beefy system.. the jump from 1080p requires more hardware than youd expect.
Want to replace this mess with 3 27" QHD IPS panels. VESA mounts are mandatory; minimal/no-bezel cases would be preferred. I don't see that combination of features available anywhere.
Also at $700 - $1000 dollars apiece it would be impossible for me to get all three at the same time. I could swing the cash for three of the Korean panels but spending that kind of money on a scary warranty, quality gamble is a bit un-nerving.
So I guess some comprehensive reviews of the lesser panels and comparisons to the name brand monitors would be extremely helpful for me at this point. I could have worse problems!
This certainly applies to my 53-yr old eyes. I have two 1920x1080 monitors now, and I use the smaller one (21.5") on my primary PC because I am a little less likely to miss things than on the 23" one. Also, it isn't just the cost of the monitor; for games you're looking at $400-$600 price of graphics card(s) to go with it, plus a beefier PSU... I just can't justify it. I'm not knocking those who can, but I can't.
I am happy with 1920x1080; I suspect my next monitor upgrade (unlikely to be soon) will be to get a 120Hz monitor for 3D, but not to get more real estate.
QHD is more generally 3840 x 2160, but in regards to being 4x 720p, it's acceptable. Just not too... correct.
For example, 720p shouldn't be HD if 1080p is HD. Like... 720 should have been 720miniHD but for marketing use, it's HD because HD is always good. So QHD is more reasonably 4x 1080p.