With its white LED backlight the Samsung S27B971D is only capable of the sRGB gamut and nothing larger. So for all of this testing I used CalMAN 5.1.2 with an i1Pro spectrometer and a C6 colorimeter that is profiled off the i1Pro. Our targets are 200 cd/m^2 of light output, a gamma of 2.2, and the sRGB color gamut. The pre-calibration measurements are done using the sRGB mode as I can adjust the brightness to 200 cd/m^2 and it is more accurate than the Standard, High Brightness, or Cinema modes.

 

Pre-Calibration

Post-Calibration,
200 cd/m^2
Post-Calibration,
80 cd/m^2
White Level (cd/m^2) 199.19 198.86 80.07
Black Level (cd/m^2) 0.4146 0.4266 0.1761
Contrast Ratio 480:1 466:1 455:1
Gamma (Average) 2.2195 2.1989 2.4188
Color Temperature 6257K 6533K 6460K
Grayscale dE2000 3.2326 0.4453 0.491
Color Checker dE2000 1.8896 0.6109 0.4321
Saturations dE2000 1.8564 0.4521 0.3985

From the report that comes with the S27B971D in box I expected better results. Out of the box, the grayscale has a definite lack of blue, and the error levels are much higher than you want. The gamma is more of an S-curve than a slope, and the contrast ratio is only 480:1. Color accuracy is good but cyan shades are particularly bad compared to others. Skin tones are very nice and we usually notice those errors first.

Give the Samsung a calibration with CalMAN and now you have a monitor. The only negative is the contrast ratio of 466:1 as the black level has risen from when the backlight is set to maximum. This is very strange behavior, but it is what I measured and I double-checked the data. Look beyond that and you see perfect numbers. Every single dE2000 value is below 2.0 so you won’t see a flaw in the display. Images look incredibly accurate and the accurate gamma helps make the contrast look reasonable.

Going to our other target, 80 cd/m^2 of light output with the sRGB gamma curve, and the behavior is the same. The S27B971D has an okay contrast ratio and is amazing everywhere else. Our maximum dE2000 values are even lower with some of the bars being practically invisible. Post-calibration the Samsung S27B971D produces amazing results that are as good as any display I’ve seen. The contrast isn’t fantastic but you can use the preset Cinema mode if you are going to watch a movie or play a game where contrast is perhaps more important.

Brightness and Contrast Uniformity Data
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  • Death666Angel - Friday, November 1, 2013 - link

    You realize the monitor here has 240 vertical pixels more than the 1200 you speak of? Reply
  • NicoleJNavarro - Monday, November 4, 2013 - link


    hii
    Reply
  • EJS1980 - Monday, November 4, 2013 - link

    For that price I got 2 Overlord Tempest OC's, and overclocked them to 120Hz. Nothing beats 1440p at 120Hz....NOTHING!!! Reply
  • djscrew - Friday, November 1, 2013 - link

    here here! Reply
  • NicoleJNavarro - Monday, November 4, 2013 - link


    my best frends mum just got a year 2012 Mitsubishi i-MiEV by working from a home pc... browse this site
    Reply
  • twizzlebizzle22 - Thursday, October 31, 2013 - link

    Tl;Dr average monitor... High price Reply
  • Samus - Thursday, October 31, 2013 - link

    Seriously, you can get the Dell or HP 27" IPS or PLS models on sale for half the price, or in other words, you could have TWO excellent 2560x1440 monitors for the price of the Samsung. Reply
  • JarredWalton - Thursday, October 31, 2013 - link

    Except for the uniformity aspect, which Samsung does very well. But yes, it's priced too high for what you get in our opinion. Reply
  • Spoelie - Friday, November 1, 2013 - link

    What I don't get is why you didn't measure or use the "Calibrated" preset. Everything is done in sRGB. Reply
  • cheinonen - Sunday, November 3, 2013 - link

    Before I chose a preset I measured the grayscale and color saturations on all preset modes. sRGB and Calibrated were practically identical. However, sRGB allows for a brightness setting while it is preset on Calibrated. Because dE2000 will factor in a target brightness (200 cd/m^2 in our case), this would then cause Calibrated to have higher error levels overall. If we didn't have a target light level it might have been slightly better but you also only could use the monitor at 260 cd/m^2 or so of brightness. Reply

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