NEC EA244UHD Review
by Chris Heinonen on August 7, 2014 2:30 PM ESTColor Gamut, Input Lag, and Power Use
Measuring the color gamut using our calibrated profiles, the NEC EA244UHD in sRGB emulation mode encompasses 67.2% of the AdobeRGB gamut. This is a little low but not by much. We also can’t fix it since SpectraView II only lets us calibrate to Native gamut. In the AdobeRGB mode we see 92.9% coverage, which is also lower than expected.
Input lag is measured using the Leo Bodnar lag tester over HDMI. I agree that DisplayPort testing would be better, but with no CRT that can do 3840x2160 resolution to pair with it there is not much to be done about it. The EA244UHD lets you disable scaling, so we can measure if that plays any factor. It turns out that it doesn’t make any change as the lag is 28ms with scaling enabled or disabled. This is almost 2 frames at 60Hz so it probably isn’t suitable for hard core gamers, but it likely wasn’t going to be anyway.
Power use is pretty high but might be typical of UltraHD panels. At maximum backlight the disaply uses 76 watts of power on a white screen and 25 watts at minimum power. This is much higher than other 24” monitors but we haven’t seen any other UHD 24” monitors for comparison yet. You can find monitors that use less power, but not with this resolution.
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willis936 - Thursday, August 7, 2014 - link
I think a better solution than the chroma subsampling to achieve 4k60 today would be to use two connectors and stitch the picture together at a high level. It would take bigger buffers on the display and some additional circuitry but there's no reason a display driver couldn't pull this off with existing hardware. 4k60 is already the high end so I don't see why corners need to be cut, especially when displays like this tick all of the feature boxes and come with a bajillion different connectors.NECDisplaySolutions - Friday, August 8, 2014 - link
Hello. This can be done on the EA244UHD with the Picture by Picture modes, either 2, 3 or 4 way. A 4-way Full HD configuration over HDMI and DVI would give you 60 Hz support. Or you could just use 1 DisplayPort cable.marcosears - Thursday, October 9, 2014 - link
This is a nice try from NEC, but it just doesn't meet the standards of some of the really good monitors on the market today. /Marco from http://www.consumertop.com/best-monitor-guide/fpsdean - Friday, October 9, 2015 - link
LOL! TN panels are garbage! Watch what garbage you post -- none of those monitors are even good.gevorg - Thursday, August 7, 2014 - link
Does it use PWM? If yes, at what brightness levels?http://www.tftcentral.co.uk/articles/content/pulse...
kepstin - Thursday, August 7, 2014 - link
This is an LED-backlit model, so it almost certainly uses PWM for backlight control. I'd be interested to know what frequency it runs at.xenol - Friday, August 8, 2014 - link
Not every LED backlight uses PWM.NECDisplaySolutions - Friday, August 8, 2014 - link
Hello. The PWM frequency on this monitor is 23kHz. You can see all of the product specifications for the EA244UHD here: http://www.necdisplay.com/p/desktop-monitors/ea244...Ahriman4891 - Thursday, August 7, 2014 - link
PWM frequency is 23kHz, mentioned in this press release: http://cinescopophilia.com/nec-4k-24-inch-multisyn... and confirmed by a NEC rep on hardforum.NECDisplaySolutions - Friday, August 8, 2014 - link
You are correct. The PWM frequency on this monitor is 23kHz. You can see all of the product specifications for the NEC EA244UHD monitor here: http://www.necdisplay.com/p/desktop-monitors/ea244...