Works great for 2560x1440
596177
There are a number of mini display port to DVI adapters out there, but only a few that support Dual-Link DVI (i.e. they can support up to the full resolution of 2560x1600).  This one works fine for that.  The only issue I have had is that sometimes coming back from sleep the screen will be snowy.  A simple unplug/replug from the cable on the computer (display port) and it was fine again.  Not a big deal, and I've seen this problem reported for other similar adapter cables as well.  Overall worked well for me, and for a good price.
1816233
Works great on dual 30" monitor setup (2560 x 1600).  With the mouse settings at a normal (about 1/3 from the left), this gets across 5120 pixels of screen in 3.2 inches.  Precision is good for fine work, and you can always dial down with the top switch.  I knocked off one star for the scroll wheel being a bit stiffer than other mice.
2507681
I recently installed this device in my Lenovo W520 notebook to replace an earlier USB 2 version. This device is based on the Displaylink 3900 chipset, which is a better way to go than the competing Magic chipset.

12-6-14 I tried this adapter with a 2560 x 1440 monitor. It works! The DL-3900 Displaylink chipset is designed to support 2560 x 1600. The catch: If you want to drive two monitors, then the max resolution is 2048 x 1152 per monitor, no matter what. With only one monitor attached, 2560 x 1440 works, and I am guessing that so will 2560 x 1600, but I have no way to verify that.

Pluses:

1) Over USB 3.0, this device can handle 2 WUXGA (1920x1200) monitors with aplomb. I run nearly full screen i.e. 1920x1080 HD videos with no apparent lag.
2) Powered by USB 3.0 alone. No power adapter is required

Negatives:
1) Installation may be tricky - My machine has NVidia Optimus, which means automated switching between NVidia Quadro 1000m discrete, and Intel HD 3000 integrated video. To get the software to install properly, and avoid BSOD etc, it is important to disable Optimus in BIOS. Then I was able to reboot, install the Displaylink driver, reboot again with Optimus enabled, and all is well.

1b) Targus tech support is well meaning but clueless. Go to the Displaylink website forum for help.

2) There is a fixed, non-removable USB 3.0 cable. I think Targus should use an industry standard removable USB 3.0 cable to connect to the host

3) There are no screw holes for the DVI adapter. That being said, DVI does plug in fairly tight and securely

4) Although Displaylink 3900 supports up to 2560x1600 resolution, Targus chose to provide no Displayport or Dual-link DVI. Therefore, you are limited to WUXGA, or perhaps a little better.

Conclusion: This is a worthwhile product for notebook users looking to add 2 additional high-res external monitors.
1628018
I wanted the 16x10 aspect ratio, but honestly I should have gone with the 1440p units instead. Granted I have four of these on a mount so there is plenty of space to work, and I can have four applications full screen instead of fiddling with windows on two large 1440p units.

Colors are sharp, backlight is bright, backlight bleed is very low but doesn't bother me since all I do is work in terminals and web browsers all day.
4945983
Using to connect my 15" MPB Touchbar to a Dell P2715Q at 4k/60hz - works perfectly.
1808651
I purchased this 6 ft cable from NuImage, not Amazon direct. Cable works perfect for 13" MacBook Pro 2012 (Ivy Bridge CPU, Intel 4000 video). Display - AURIA EQ276W 27" IPS LED Monitor (purchased at Microcenter) with resolution 2560x1440. Image is perfect. MacBook Pro laptop goes to sleep and wakes up with this cable/monitor normally. Highly recommend this cable for 2560x1440 resolution.
2820785
The computer I bought this to use with is a self-built haswell system with a i7 4770k, 24GB ram, 2x Radeon hd6850 graphics cards, Asus z87 pro motherboard.

The 6 series cards seem to not natively support the 4k resolution, so my initial testing was with the on board graphics using the HDMI port built into the motherboard. This works perfectly in Windows 8, but I had issues where the best I could get in OSX was full resolution at 24hz, but reporting DVI1 instead of HDMI1 (still hooked up via HDMI). The text was horrible and the display had banding and color artifacts.

I found references to this display port to HDMI 1.4 adapter:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Accell-B086B-003B-2-UltraAV-DisplayPort-Adapter/dp/B00DOZHLAA/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Accell B086B 003B 2 UltraAV DisplayPort Adapter</a>&nbsp;and got it in today. This adapter allowed me to use my 6850 card's display port and seemed to be recognized more easily at full resolution than with the hd4600. Plus with the hd4600 I was having to use both on board and discreet graphics drivers, which seems to be a bit buggy still. I had issues where the computer would freeze when coming back from sleep and the Seiki would flicker some during those situations.

I found that using the discreet cards to provide a better experience and overall feel a little less laggy. They move this from a "maybe 30hz is too bad" to a "this is very usable" situation with the slight difference. Most people would probably not notice the difference unless they had used the less capable graphics solution beforehand.

The final winning factor for me was finally getting to use the Seiki in OSX 10.9 with the 6850, which features smoother window resizing and slightly smoother mouse movement than Windows 8. Plus, there is an application called smoothmouse, which seems to separate the slow refresh rate from the laggy mouse feeling. Before, the refresh rate not only looked slow, but the mouse also felt like it was lagging behind a bit. Smoothmouse seems to remove the majority of the lag. The mouse still has a "windowing" effect due to the slow refresh, but you feel much more in control over the location of the mouse pointer.

Summary:
OSX 10.9 + smooth mouse + decent video card really improve experience
Issues getting i7 hd4600 graphics working in Hackintosh setup, but fine in Windows 8
Accel Displayport to HDMI 1.4 active adapter help utilize pre-7 series AMD cards that support max of 1080p over HDMI
925932
This is my secondary monitor for my laptop and works great.  I was looking for something that is around 19" and gives better resolution than 1400 X 1050 on my laptop.
My main use of the unit is for VMs and text though I use it sometimes for graphics.

Gives 1680X 1050 max resolution at 60HZ refresh and well worth the money that you spend on it.  It is not the glossy / ultra bright vivid color screen type, though you can use it at high brightness using the pre-sets or custom calibration.
3552196
I've had my Mac Mini since early 2013, and I always had it hooked up to my displays (which were 1920x1080) using the HDMI port.  Last weekend, I got a new Dell monitor with a 2560x1440 resolution, and my Mini wouldn't drive that high of a resolution over HDMI.  In theory it should (I think, from the specs), but I couldn't get it to work.  Using an external Thunderbolt dock with a 4k HDMI output, it worked perfect over HDMI...but then I was powering up the external dock and had one more piece of equipment sitting around.  That, and if I hadn't had that dock already, it would have cost quite a bit to buy one.

After reading online that a mini DisplayPort connection should work, I decided to give this cable a try.  After all, they're under $15.  And...it works perfectly!  Full resolution, and the image came up right away.  I see no issues with it so far at all.

I can't speak to higher resolutions (either the 2560x1600 or 3840x2160 mentioned in the description), but it definitely supports 2560x1440.

On a related note if you're shopping for a 2560x1440 monitor and have a Mac, my brother Joe got a 2560x1440 monitor on the same day that I did, and his Mac Mini worked perfectly fine over HDMI right away, but he has a newer model from (I think) 2014.  Maybe if I had messed around more with the setting, I could have gotten it to work, but nothing that I tried worked for me until I used either that Thunderbolt dock or this much (much) less expensive cable.

Build quality is quite good, too.  The cable is what I'd call typical diameter, and it's easy to route and get connected.  I recommend it.
3146774
Works flawlessly.  If you're trying to format a 16:9 source to fit a 4:3 display you'll need to be sure your device can pull that off.
1285626
I had to get this item when I bought two monitors that only had displayport inputs. I am a gamer and just also recently bought a EVGA FTW 980. Problem is it only comes with on displayport adapter. There are tons of products that can convert displayport to hdmi, but little to none that can do hdmi to displayport. The only other product that seems to work, can only handle 1980 x 1440. My two new monitors are both 2k (2550 x 1440). This product advertised that it can handle 4k resolutions at 30 Hz.

Well I can truthfully say it works, at 2k resolutions. The monitors, Acer XB27oHU (with G-Synch), can go GTG in 4 ms (well advertised anyway), so I was worried about increased latency. Glad to say in Grand Theft Auto 5 I don't notice any delay. This product, though pricey delivers.
181275
I bought this to replace a  Fresco Logic based USB3 to HDMI adapter that flashed on and off all the time. Apparently that's a problem for almost all the USB3 to HDMI adapters based on that chipset/drivers. This unit is based on the DisplayLink chipset. So far no problems with flashing screens. My setup is an Acer Laptop w/Core i5 6200U with both the Intel HD520 graphics and a nVidia GeForce 940M, The laptop HDMI output running 1 of the matched LG 24", the laptop VGA output running a 27" Viewsonic and this USb3 to HDMI running the other of the matched LG's. All monitors are running in 1920x1080 (108op) resolution. My purpose for three monitors isn't gaming or video/graphics. I use the screen real estate to keep many windows open at once. Even so, the color on the two LG's match pretty well. I can throw a 1080p video up on any of the three screens with out a problem with smearing, stutter or artifacting. Also, compared to the Fresco Logic piece installation and configuring was a piece of cake. The only problem was that none of the included drivers worked with Windows 10. I had to go to the Display Logic download site and get newer drivers there first. The DisplayLink software integrates well with the OS and you can control the USB3 to HDMI adapter in the OS config tool just like you do with the VGA and HDMI outputs. For $24 it was well worth the money.
3045425
With the 2 mini Displayports on my rMBP 13" 2015, I connected 1 of them to Crossover monitor (2560x1440) and the other to my Samsung 40JU7500, and I have no problem getting 60hz at 3840x2160 on the Samsung. Great adapter, well worth the wait!
605492
Works Great! No dead Pixels!  Very easy to adjust with the included "puck".  You will have to use a dual link DVI cable to reach 2560x1440 resolution (one is included), just make sure your system can support it.  I use this in my Office for work, so I can't comment on how it does in games.  At 2560x1440, you have plenty of onscreen real estate to open up multiple docs or windows.  It also sits up high where it is ergonomically correct unlike those low, squatty monitors that give you a neck ache after a while.  My eyes really appreciate the low Blue light feature after an 8-10 hour day in front of it.  For you "C" class folks, it has excellent styling and will look good on your desk.

 Highly recommended!
4634902
I bought two of these to work with my early 2014 MacBook Pro and two Dell monitors. They work perfectly and support the 2560x1440 resolution on my 27" monitor. The plugs fit well side by side on the MBP and don't touch the plugs in the adjacent power or USB slots.
1555904
Great addition to my HTPC.
With the included mounting hardware I was able to easily fit/mount it into my low profile case.
Did the job as far as screen resolution with my Sony 70' TV/monitor.
With the original built in video on motherboard I was not able to see the full screen, it would cut off top and sides.
This video card with the software you can scale the resolution.
Looks GREAT!
1962310
I bought this last Christmas for my screen-space-starved wife and her MBA 3,2.  Hooked up to two Samsung 1600x1200 monitors (3200 wide -- pretty nice).  It has worked well for her except for a recent glitch in the unit where the monitors would disconnect.  I found a firmware patch which sounded like it would work (Matrox seems to have a pretty good support site), installed it and the problem seems to have gone away.  Fingers crossed.