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Viotek makes no claims about HDR in the GNV34BDE’s marketing, but it does indeed accept and process HDR10 signals. We used our Accupel pattern generator along with an HD Fury Integral to create the signal. We also confirmed HDR operation in Windows; Control Panel recognized the Viotek’s HDR capability, as did our HDR-enabled games.
HDR Brightness and Contrast
The Viotek musters a bit more brightness for HDR signals than it does for SDR (354 nits versus 302 nits). That helped highlights pop a bit more. Black levels are very deep putting the monitor in fourth place for that test. Contrast was about the same as it was in SDR mode (3,053:1 versus 2,595:1). We tried turning on an option called Dynamic Luminous Control, but that only served to raise black levels and reduce contrast to below 1,000:1. Leave that one off for sure. Other image controls, like color temp, gamma, brightness and contrast, were grayed out.
One interesting note: our initial HDR White measurement was the same 200 nits as SDR after calibration. We went back to SDR mode, maxed the backlight, then returned to HDR mode. The reading was then 354.2 nits, as shown above. Therefore, the GNV34BDE inherits the SDR brightness setting when an HDR signal is detected. The workaround is to up the brightness slider before switching over to HDR.
Those concerned with the Viotek’s relatively low HDR brightness needn’t be. Though it’s generally accepted that 400 nits is a minimum standard for HDR, the actual contrast number is more important. The Dell in our comparison group achieved a very high value, thanks to its effective dynamic contrast feature that selectively adjusts brightness according to on-screen content in real time. The Viotek doesn’t have this feature but has slightly more dynamic range than the AG493UCX. So even with lower overall brightness, it could hold its own and even slightly exceed the AOC’s image depth in HDR mode.
Grayscale, EOTF and Color
There are no color-related controls available for HDR signals, but the GNV34BDE measured very accurately nonetheless. There was a slight push toward green from 25-60% brightness, but this was nearly invisible. The EOTF curve is slightly dark up to the clip point, which made a smooth transition to tone-mapping.
Color tracking for yellow, cyan, clue and magenta proved solid with most points on-target. Red, on the other hand, was over-saturated between 40 and 80% brightness, while green couldn’t quite get to the 100% box. This test result compares favorably with other screens that cost more. We can’t really fault HDR performance here given the Viotek’s low price and lack of any claims about HDR function. Its HDR image is quite good though.
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Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors.
Man is that one ugly stand.... I think is is an awesome monitor for the price but I could not look at the stand ......aaarrrggghhhh!!!!:LOL:Reply
I looked for a better place to post this but couldn't find one:Reply
The Tom's Hardware website uses a lot of CPU in Firefox. I don't know why it doesn't in Chrome or Edge. The forums are fine also. But if I have the homepage or any article/review open in Firefox, it uses about 30% of my CPU just sitting there.
"HDR" at 350 nits? I don't think so. That doesn't even qualify as the not-really HDR 400 spec. This is NOT an HDR monitor folks.Reply
I agree that could look a bit dull if was a TV but while 500+ nits would be ideal you are not going to get it at $450, many even more expensive ones are only 300-400 nits. This is bang for your buck and not top of the tree for sure.techrabbit2015 said:"HDR" at 350 nits? I don't think so. That doesn't even qualify as the not-really HDR 400 spec. This is NOT an HDR monitor folks.
"GTG" @ 4mS? I don't think so!Reply
Kudos should only be awarded to GTG@1mS. Otherwise, FreeSync (@144hz) is for naught.
Agreed this is not an HDR monitor. It's an "HDR-ready" or "HDR-compatible" monitor. I.e., it can accept and decode the 10-bit signal, but it's going to downsample it to 8-bit. And this is not news; this deceptive marketing ploy by manufacturers has been covered (and criticized, including from within the TV and monitor industry) for some time now: https://web.archive.org/web/20180612121214/http://www.avhub.com.au/news/sound-image/what-does-hdr-compatible-mean-461032Reply
That said, the price is great for the feature set. I won't be getting this one myself, because a non-adjustable "chopsticks" stand will have to be replaced by a proper VESA one, which jacks the total cost up into the range of an at least marginally better monitor.
I bought this monitor to replace my triple screen set up. Much better picture visually, even without calibration. After calibration, this screen is one of the best I have owned out of dozens. I honestly don't mind the stand as on my black monitor riser I can barely see it anyway. My one gripe- my display port cable hangs from the input and there is nowhere to hide it. Ugh. Awesome purchase anyway. Oh, and I don't care about HDR, especially at this price.Reply
Just curious, what calibration settings did you use? In the article it says multiple times, we highly recommend using our calibration settings. But I'm unsure what those settings actually are? Besides the chart that shows settings for red, green, and blue, and brightness levels I don't see any additional settings for black levels, sharpness, etc. Did i miss somewhere in the article where it outlines all calibration settings? Thanks for your help!maestro0428 said:I bought this monitor to replace my triple screen set up. Much better picture visually, even without calibration. After calibration, this screen is one of the best I have owned out of dozens. I honestly don't mind the stand as on my black monitor riser I can barely see it anyway. My one gripe- my display port cable hangs from the input and there is nowhere to hide it. Ugh. Awesome purchase anyway. Oh, and I don't care about HDR, especially at this price.
I don't think they listed all of the settings. I adjusted the best I could according to my room lighting manually. If you are really worried about the color, I wouldn't, even before I adjusted it, I didn't see any issues at all, get a color meter.Reply
If you are just gaming and watching content, adjust to your personal liking in your room. If you are a serious photo pro, you may want to spend more.