Does this support extending multiple displays or only allows for duplicating?
607724
Yes you can extend the display. I have mine set up with 2 external 23" monitors and the Ultrabook display for extension over 3 screens.
1243466
Yes, we have a user who drives three screens off this card, all as one large extended desktop. She does exactly this, with Outlook, Word, and a proprietary software each on different screens.
1391218
Duplicate screen worked from the box for me. Plug in, go to display, select which output.
887281
This is nothing more than a Booster/splitter. In other words, it will display the same thing on two different monitors or projectors. It could best be described as being "dumb" hardware. If you want unique images on each of the two external monitors you will need something like a USB to VGA adapter (which this is not). Good luck to you.
364845
There is not. It seems to broadcast to all outputs at one. The dual ports did not work on a Surface, so I can't say if they are two distinct displays or not.
1329437
It will extend, but the extended desktop will be duplicated (or quadruplicated in this case) in all four monitors. This doesn't create 4 screens that sequentially extend your desktop.
1359569
No this device takes 1 video output and makes it viewable on two different video screens. Like from a DVD player hdmi output to two TV's in a pool hall showing the same exact image.
77795
this cable will only duplicate the current screen & it is necessary to alter the control panel in windows in order to get both screens to work properly, I used this cable to put my PC screen on my both my digital TV & PC @ the same time
1952766
No, you would need something else to use two monitors at once. This is used for switching between two monitors that are used one at a time.
824463
Yes but it would only show like a second monitor....same image on the ones attached to this.
1459554
Yes, it can do this. I run Windows 7 and use this to stretch out my desktop, often running two windows, one in each screen. It requires two different types of cables to do so, so if you're deadset on dual HDMI ports, you should continue to look.
479863
Yup, answer below is correct. This will work for mini-displayport to 1 device whether DVI HDMI or regular DP. This does not support multi-device output.
192152
I'm not sure because I only use 3 monitors. There IS a selection to duplicate the display on monitors 1 AND 2, OR on monitors 1 AND 3. I don't know if you'd have the selection you want if 4 monitors were connected. I'd suggest that you email the manufacturer directly at support@visiontek.com and ask your question. Their website is at http://www.visiontek.com.
1267557
You can simply arrange two application windows. The monitor is wide enough to do this easily.
1020682
No sorry. This box lets you have a second identical monitor with the same image as the 1st
2203917
This depends on your graphics cards. Most can be cloned or extended to one other monitor.
594699
It will duplicate the main laptop. If you have a video card on your system that reads 2 separate monitors, then you will get two different displays using the splitter.