HP z27x Review
by Chris Heinonen on December 2, 2014 4:00 PM ESTFor the AdobeRGB calibration we use the same targets as the sRGB calibration only with the AdobeRGB color gamut. Pre-calibration the numbers for the HP z27x in its AdobeRGB mode are perfect. They’re good enough that I would see no reason to calibrate this most likely. The grayscale and gamma could be better, but not by much. I really don’t have much to complain about when it comes to the preset AdobeRGB mode.
Post-calibration it is better, but barely. Since our target during a calibration is an error level of 0.5 dE2000 and it was already there, it was unlikely to improve much if at all. If we set a target of 0.1 dE2000 it might have done even better, but you’re then trying to make an improvement that you cannot see so you are just wasting your time. There is really no more to write about the performance here because it’s just great.
The results are the same when we target 80 cd/m2 and the sRGB gamma. The HP does not have visible errors after calibration. It’s a professional level display and handles this color gamut and setup with ease.
The AdobeRGB modes on our HP z27x were more accurate than the sRGB modes were. Each unit will have some variation here since they are individually calibrated, but what we can see is that HP provides the hardware to create a totally accurate image. Using CalMAN to manipulate the internal LUT we get a display that is incredibly accurate, as good as anything we have seen before.
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ant6n - Wednesday, December 3, 2014 - link
@Chris: when seeing this article in rss, it's not clear that this is a monitor review (the word 'display' comes up nearly last).chowyuncat - Wednesday, December 3, 2014 - link
Could you put Apple's 27" Cinema or Thunderbolt display's input lag in your monitor reviews?cheinonen - Sunday, December 7, 2014 - link
I don't have one so I can't do that, and they don't have HDMI ports so I can't measure it the same way either.marsupilami - Friday, December 5, 2014 - link
Am I the only one who thinks this article lacks an introduction?Good review otherwise although I agree with kyuu regarding the uniformity issue, unless the monitor was purchased by AT I don't see how requesting another sample would've made a difference. And even then you can publish both sets of numbers and let the readers draw their own conclusions. As it is we have no clue whether the results are due to a damaged sample or simply poor performance.
SanX - Sunday, December 7, 2014 - link
Who needs QHD? Who needs 27"? Are gamut pros happy that they dont have yet 4K minimum 30"- 40" monitors?mtbakerstu - Saturday, May 9, 2015 - link
Chris, thank you for what I thought was a very good review. My question is not just to you, but to the community that has participated in this forum as well. Is there any new consensus on the uniformity issue that Chris raised? It does seem an achilles heel, if the issue is not specific to the z27x unit that Chris evaluated. Since last comments posted, has anyone purchased (or know anyone that has purchased) a z27x to confirm or disclaim what Chris communicated as a serious issue for the model? There aren't many options that cover the full range of color gamma options at this price point, so I am inclined to buy one, but felt I should first check into the community. As an alternative, I am considering the z24x, but perhaps uniformity is an issue with this model as well. Thanks in advance for the any additional feedback from the community here.kflorian - Sunday, July 12, 2015 - link
Anybody have an accurate weight for this WITHOUT the base?