Samsung S23A750D 3D LCD Display
by Chris Heinonen on December 17, 2011 2:45 PM ESTSamsung S23A750D Brightness and Contrast
The S23A can produce more light output than many monitors, with over 300 nits of light output possible. While in most cases I would say this kind of light output is a crazy amount that few people will use, the highly glossy screen on the Samsung might make this much light output useful if you have a lot of reflections around your work area from windows or overhead lights. Additionally, Active 3D glasses will cut the light output in more than half, as each eye only views the display half the time and they have tint to them, so ~25% of that light output would be 80 nits. It also manages 76 nits with the backlight brightness set to the minimum, so that gives you a very wide range to adjust the monitor to your preference.
The black output level on the Samsung falls right into the expected range for the monitor. I was a bit disappointed with this as Samsung has managed to get darker blacks out of their LED edgelit TVs, so I was hoping more of that technology would copy over to their monitors. As it is, it’s a little on the bright side for a monitor of this size.
Despite the brighter whites, the black levels rise as well and so the contrast ratios are a pedestrian 900:1 on average. That's neither spectacular nor disappointing; the contrast ratio is merely average for 2011. As usual, we test without dynamic contrast enabled, as the change in backlight intensity tends to be visible and distracting, though Samsung claims up to a 5 million to 1 contrast ratio with dynamic backlighting. (I'm not sure how they'd get there, considering the maximum white level divided by the minimum black level only results in a contrast of 3813:1; they would almost need to shut off the backlight entirely to get down to the necessary 0.000064 nits black level.)
The brightness uniformity of the S23A comes in as merely average as well. With the center at just over 200 nits, only one other area of the screen measured over 190 nits, and only one more was even over 180 nits, with the lower right of the screen measuring over 20% darker than the center.
The black uniformity was a little better, though the higher black level overall meant that none of the values were spectacular. The same lower-right area that was darker in the brightness measurements was also darkest in the black measurements, so the backlight just seems to not be as powerful in that area.
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JarredWalton - Monday, December 19, 2011 - link
So this is an oddity of HDMI. There are plenty of graphics cards that support HDMI 1.4a, which is the latest standard. For example, HDMI 1.3 category 2 supports up to 10.2Gb/s bandwidth, which should be enough for 120Hz at 1920x1080 (a 32-bit signal would require 7.96Gb/s). The problem is that HDMI uses HDCP, and I believe most (all?) consumer HDMI implementations use a chipset that can't do 1080p120.Starzty - Monday, December 19, 2011 - link
I can tell you from experience that every NVIDIA implementation I have used supported it. I have tested it on an 8600m, a 460, a 9800gt and a 460m. It only worked properly at the standard TV resolutions but it did work. While for video games the performance hit is significant enough that it doesn't matter, with a 27 inch screen I am thinking more about the applications in regard to 3d blu rays. I haven't tried AMD systems but I may give it a shot next time I am around one. I have tested it with a 3d viewsonic projector through HDMI and on a 3d tv which I cannot recall the brand of. The reviewer may have to wait for official 3dvision support to try an automated test through HDMI but you can tell the nvidia driver to push 120hz and it should go through.I know theoretically it should work but I thought you needed 1.4 do to 3d, I wasnt aware 1.3 supported it
JarredWalton - Monday, December 19, 2011 - link
Just to update on this, I chatted with Chris and he said with an HDMI connection to the LCD there was no way to send a 120Hz signal. This could be something on the AMD driver side of the equation, or it may be the HDMI chipset in the Samsung LCD just doesn't accept that. In terms of specifications, it's important to note that 1080p120 isn't mandatory or even listed as an optional resolution; anything sending 1080p120 over HDMI is using HDMI more as a carrier for a DVI signal.cheinonen - Monday, December 19, 2011 - link
HDMI technically has the bandwidth for 120Hz, but it's not in the standard for HDMI 1.4a. Neither the Windows settings nor the Catalyst Control Panel would allow a refresh rate of 120Hz to be selected without using DisplayPort for the interface. For 3D over HDMI, the required formats are:- 1080p24 Frame Packed (so 24p for each eye)
- 720p60 Frame Packed (for gaming, 60p each eye)
- 1080i60 side by side
- 720p60 top and bottom
- 1080p24 top and bottom
There is no 1080p60 frame packed there, which is what you would need to support a true 120Hz refresh rate at 1080p resolution. Some vendors might support this, but it's not in the standard, but it is fine with DisplayPort, so that's the route that Samsung went.
Death666Angel - Sunday, December 18, 2011 - link
I am not really interested in seeing reviews of 120Hz monitors as long as they are 1080. I own a 24" 1200 right now and would really like to see more reviews of 1440 monitors (Dell U2711, Fujitsu P27T-6, Samsung S27A850D, Hazro HZ27WB/C). Especially the Samsung has been making waves. Some complain about the backlight bleed, but other praise the great matte finish which does not add grainyness (like e-IPS 27" have). :-)dj christian - Thursday, December 22, 2011 - link
Yes agreed! And AT somehow forgets my login everytime. Running FF 9.IceDread - Monday, December 19, 2011 - link
Good review, I however lost all trust in samsung after the scandal with samsung 226bw.http://www.behardware.com/articles/667-1/samsung-2...
DanNeely - Monday, December 19, 2011 - link
Meh. At this point is there any major vendor who hasn't done a component lottery at some point?IceDread - Tuesday, December 20, 2011 - link
Well, which companies do you know about that has done it?If you keep purchasing products from a company with bad business ethics the industry will never improve.
justniz - Monday, December 19, 2011 - link
Terrible review.Why would a non-gamer without anappropriate GPU try and review a 3D Monitor?
Jeez at least start with the prerequisites filled.
Furthermore testing with AMD GPU was a bad choice anyway...Everyone knows AMD 3D software support is a poor second best to nVidia's.