Extremely low output resolution
354156
This thing will only output 640x480 resolution on my system. This is utterly useless in any modern computer setup, as 720 and 1080 are the current standard for most monitors.
1362293
Garbage . Only shows resolution of 600x800 . Tried 2 different monitors same thing . When I connect those monitors to a different adapter no issues .
1537983
Have tried everything and cannot get my it to show picture quality above 480p.
I thought simply connecting my PS3 to the computer monitor would have been rather easy, but after trying for nearly an hour in the PS3's settings and the monitors setting, i just get the same message: "Input Signal out of Range- Change settings to 1600 x 900 60hz".
1858945
The screen display ratio is set at 16:9 and there appears to be no way to change it.  Therefore using it as a computer monitor results in a distorted (stretched) image, which is particularly annoying when editing photographs.
3672498
Worked at low resolutions but did not go to 1080p as advertised. I returned the item.
651296
2560x1440 to my monitor is crystal clear in conjunction with a Blue Rigger High Speed HDMI cable. Other options I tried didn't support full rez or introduced artifacts.
4828849
Im using this as computer monitor and its resolution is so bad. My computer recommends 1280720 for this one. If you planning to buy this as both monitor and tv, I'll not recommend you
2251458
I bought this device to make my Amazon Fire TV work with my DVI-in-only computer monitor.

It did NOT work! The monitor still has a lousy video resolution, despite of high-quality cables and a high-quality HDMI-to-DVI adapter. Trying to choose another video mode on the Fire TV still leads to the message "Resolution not supported".

When connecting another video source (like my notebook) instead of the Fire TV to the same configuration, high resolution is displayed on the monitor without problems (1920x1200).

Maybe this review prevents further disappointments like this.
1253033
Output is far too low for my auxiliary input. Even with volume maxed out on iphone, bluetooth, and stereo music was barely audible at driving speeds.
717219
Scaling is a real problem and the interface is fairly poor. The main screen has HUGE launcher buttons for a few not very useful functions. In the apps menu the icons are very large and poorly rendered - blurry with noticeable pixels as though they had been scaled up.

Video rendering has a similar problem. While the device claims to render 1080p, it in fact is up-sampling 720p. You can see this yourself by changing the output on hdmi to 720p - the output will look exactly the same. Actually changing the output resolution is worthwhile because it will eliminate the video tearing (black or red horizontal lines) that occur in 1080p.

I'll be experimenting with third party roms and doing a bunch more reading on xda to see what other capabilities this device has.
4106000
Does not output to 1080p.  I was only able to get a max of 480p using a Nintendo Switch to a 1440p monitor.  I tried testing it directly from my gtx 1080 in my pc to the same monitor and the highest resolution detected was a laughable 1024x768.  Needless to say it's on it's way back to Amazon and I will steer clear from StarTech products in the future.
1004747
In youtube u can find better tutorials. Some pictures are in very low resolution. Doesn t woth $30 bucks!!!!  Wouldnt buy
3296926
Poor Sound
Average Resolution
Small size but needs hdmi cable that ruins the practicality of the size.
1113121
I bought this for a Raspberry Pi computer, enticed by the advertised 640x480 resolution. Unfortunately, the actual device appears to have only 1/4 that, or 320x240 pixels. Text is super fuzzy with the default Raspberry Pi display settings, but it's still possible to use the command-line (assuming you don't need to accurately distinguish individual letters).

To get a setup where one image pixel is approximately one screen pixel, I edited the following settings into /boot/config.txt:

framebuffer_width=320
framebuffer_height=240
overscan_top=-16
overscan_bottom=-32
overscan_left=0
overscan_right=-16
sdtv_mode=2

Things are still fuzzy, since the pixels don't line up exactly, but at least text is clearly visible, and the image occupies roughly 100% of the screen area.
1992501
Arrived promptly well package and with no dead pixels.

I made the mistake of assuming I could connect this monitor to my HDMI/Displayport only computer using a HDMI to DVI dual link converter. I could never get it to work past the 1280x600 resolution in my linux setup. Hopefully someone can help. Never buying a DVI-D only monitor no matter how cheap it is.

The power supply is a big fat brick and the monitor makes a very slight buzzing sound. There are 7 buttons which unfortunately, four of them I have no clue how or what they are for since there is no english manual.
1776733
Unable to support over 800x600 resolution after two months. ATI Catalyst says DP cable has malfunctioned. I bought two cables, the other works, also tested it in my other DP port to verify no issues with port. Going to have to buy a different brand now.  I will admit that I regularly unplug and replug in this cable in order to force my graphics card to output sound through HDMI rather than the DP ports as they take priority. I would estimate I've unplugged it around twenty times at this point.
226737
I bought DP-400 model just because description said that it would would display at full resolution on 27" mac monitor. I was trying to display my HP notebook on to Imac as main monitor through a docking station.  This equipment will work at 1280x720, But it won't work at 2560x1440 which is the normal display resolution for Mac.  I worked with Atlona support for few days to resolve this issue.  I was finally  transferred to an expert on  DP-400. But that guys was not at all helpful.  He blamed everything on the PC - video card, driver etc.  I have upgraded all of them he mentioned.  FInally I had to return the product. What a waste of time!  I have spend so much time to make this work.  I can buy a 27'' inch monitor with little more money