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Results: Pixel Response And Input Lag

AOC I2757Fh And ViewSonic VX2770Smh: Two 27" IPS Monitors

We use a high-speed camera, shooting at 1,000 frames per second, to perform these tests. Analyzing 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 that our camera captures the precise moment that the monitor’s LED lights up, indicating a video signal being received by monitor. With this camera placement, we can easily see how long it takes to fully display s pattern after pressing the button on the generator’s remote. This testing methodology allows for accurate and repeatable results when comparing monitors.

Pixel response has been pretty much the same for all IPS screens we’ve tested recently. The real difference appears in the signal lag measurement.

Here, we see that the difference between monitors is far greater, with the AOC pulling out the win at 52 milliseconds. Keep in mind that this is measuring total lag, with the pixel response time factored in. Of course, your actual gameplay mileage will vary depending on the hardware and software configuration used. Since we’re using a pattern generator, we can eliminate these variables.

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  • 22 Hide
    Anonymous , January 16, 2013 3:25 AM

  • 25 Hide
    kinggremlin , January 16, 2013 3:41 AM
    Unless you're legally blind, why would anyone want a 27" 1920x1080 monitor? I still don't get why one industry thinks we need 1920x1080 on a 5" cell phone, while another thinks 1920x1080 is all the resolution you'll ever need no matter how big your screen.
  • 26 Hide
    Nintendo Maniac 64 , January 16, 2013 3:44 AM
    In other news, Micro Center and Monoprice have 27" monitors @ 2560x1440 for just under $400, both of which are based off the inexpensive 27" Korean monitors but come with a US warranty:

    Micro Center - AURIA EQ276W 27" IPS LED Monitor @ $399.99
    Monoprice - 27" IPS LED CrystalPro Monitor WQHD @ $390.60

    Surely that's the comparison readers really want to see. Get on it Tom's!
  • 10 Hide
    jupiter optimus maximus , January 16, 2013 3:52 AM
    I bought myself Achieva Shimian QH270-Lite on ebay and it is a 2560x1440 monitor with 6ms response time. Its basically a rejected apple monitor with no frills and no warranty (sold in Korea for $200). I doubt monitor manufactures will release 2560x1440 monitors at mainstream prices within the end of this year, as Intel predicted. Or 4k monitors by 2015.

    Here are some links to sites dedicated to these 27" 2560x1440 monitors:

    If you you would like to know more how your graphics card, monitor perform on 1440P and above resolution with certain games, go to to this link:
  • 1 Hide
    grokem , January 16, 2013 3:55 AM
    Thanks for the review. These do look like very good choices for those that don't need a gaming monitor. No offense to this review as I do think it serves a purpose and will be useful to many. However, I think I'm going to quit reading monitor reviews for a couple of years. Maybe by then my 15 year old monitor and my 10 year old ~$500 LCD will be surpassed by something new and better.
  • 0 Hide
    Nintendo Maniac 64 , January 16, 2013 4:01 AM
    However, I think I'm going to quit reading monitor reviews for a couple of years. Maybe by then my 15 year old monitor and my 10 year old ~$500 LCD will be surpassed by something new and better.

    They already have been surpassed, but the tech is expensive currently:
    Sony PVM2541 25-inch Professional OLED Picture Monitor
  • 13 Hide
    bavman , January 16, 2013 4:23 AM
    Pass. 27'' is way to big for 1080p, needs 1440 at the minimum.

    Manufactures need to stop making 1080p monitors. With 4k around the corner, it should be at least 1440 or 1600 now. Were not gonna get anywhere until someone finally starts to really mass produce higher res monitors
  • 7 Hide
    abbadon_34 , January 16, 2013 5:31 AM
    Remember when CRT's supported tons of resolutions and refresh rates, more than most could handle? Then trendiness and HDCP got in the way.
  • 6 Hide
    zander1983 , January 16, 2013 5:58 AM
    Nintendo Maniac 64They already have been surpassed, but the tech is expensive currently:Sony PVM2541 25-inch Professional OLED Picture Monitor

    Still 1080p, pass.
  • 2 Hide
    Nintendo Maniac 64 , January 16, 2013 6:41 AM
    They already have been surpassed, but the tech is expensive currently:
    Sony PVM2541 25-inch Professional OLED Picture Monitor

    Still 1080p, pass.

    It's a 24" monitor, what did you expect? (they market it at 25" but it's really 24 5/8")

    If they come out with a 27-30" monitor, surely it'd be 2560px wide since they are professional-level displays.
  • -3 Hide
    merikafyeah , January 16, 2013 8:09 AM
    Nuts to that1920x1080?Next.

    I don't see many people complain about their 60" 1080p TVs.
    60" is waaay bigger than 27". Maybe sit just a tiiiiiiiny bit further from your screen?
  • -2 Hide
    hytecgowthaman , January 16, 2013 8:36 AM
    5Ms aoc is good for gaming monitor at low cost.
    please put the information how much mhz it can handle (to compare good gpu for that) .
    15" aoc run at 300mhz in aoc monitor software.
  • -3 Hide
    hytecgowthaman , January 16, 2013 8:40 AM
    Aoc monitor low cost and 5ms but viewsonic 7Ms and high cost. but both give 3year warranty.
  • -7 Hide
    redgarl , January 16, 2013 10:37 AM
    PC monitors are a dying bread for the common home user. I switch to an HDTV with 120Hz... the only drawback is input lag... man I didn't see this one comming especially at 1080p.

    It's not bad at all for single player games, but if you play Counter-Strike intensively, maybe not a good idea. But anything other than FPS online is not a real matter.

    Get a good Samsung HDTV and get rid of the office. There is some awesome logitech products for input device that let you transform your desktop into a gaming HTPC.
  • 3 Hide
    wanderer11 , January 16, 2013 1:08 PM
    I just got an Auria 2560x1440 two weeks ago and I could never go back to 1920x1080 now.
  • 4 Hide
    techbaddie , January 16, 2013 1:45 PM
    I also just got an Auria 2560x1440 last week, and I could never go back to 1080 either. The Auria dominates! Shreddder style
  • 1 Hide
    EDVINASM , January 16, 2013 2:32 PM
    Didn't know this site was full of tech gurus with deep pockets. I will go for this 27" never mind that it's "only" 1080p - I need TV replacement and this will do just fine, especially being IPS panel for such a low cost. Heck even my ASUS 278Q or whatever model is dearer. Any 2560x1440 monitor that is not made in meat factory would cost nearly twice as much so.. Until 4k becomes standard I am fine with 1080p.
  • 2 Hide
    truprecht , January 16, 2013 3:01 PM
    I bought myself an Auria for Christmas - it's awesome. Huge, bright, crisp, and not one dead pixel. For $300 less than DELL/HP and $600 less than Apple's product using the same LG IPS panel.
  • 0 Hide
    nukemaster , January 16, 2013 3:14 PM
    Can anyone with those Auria screens comment on if they have noticeable off angle glow?

    Image of an Asus(I know it was e-ips, but it was BAD, even TN did better then this thing. This was MAX bright vs 26% on the other screen) I had next to a Samsung S-PVA. The glow was extreme even at slight angles and the card color reproduction was just awful.
  • -1 Hide
    chumly , January 16, 2013 3:20 PM
    ....or spend the same money on a 1440p LG panel by one of the thousands of manufacturers out of Korea or China (or Overlord here in the states) instead of wasting your money on old, out-dated tech.
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