It goes by few names but its this thing
http://accessories.us.dell.com/sna/products/Cables/productdetail.aspx?c=us&l=en&s=bsd&cs=04&sku=330-5521&dgc=BF&cid=7421&lid=197378&acd=10466193-1225267-u102106t1582920f0fp0c0s558
Anyway I got mine today and did a 3 hour gaming session test.
Pros:
- just plug in and it works
- no input lag introduced going form DP->DVI -> monitor
- no problem at all during testing (like strange black outs, freezing, BSOD etc..)
- can set to all resolution my monitor support
- No need to spend $400+ for a new monitor for DP connection
- unit is well built and high quality. (metal housing)
Cons:
- $$$$ expensive
- needs a USB port to power the thing.
- takes an extra second more than the other native DVI connected monitor during "black outs" (ex. when you are changing resolution or etc..). This is really not a problem and just a very minor nick pick, some other TV or monitor takes the same or longer to "black out" and switch resolution anyway. and it's not like you do it alot.
- extra dongle/box in the back of your pc
In summary this thing works and no problem that I can find. it just works and it introduce no input lag at all. (I'm a fast pace FPS twitch shooter player and I was actually worry about any extra input lag but there is none at all. ) I'm very happy with it.
Here's some pictures
How my case are like before:
After installation
Some input lag comparision (notice they are all the same :)
btw: pictures are taken with a Canon SD780is point and shoot camera (thats the only camera I have, but I lower exposer and did any setting I can to make shutter speed faster). Not sure how accurate it is compared to a DSLR but the fact that those pictures have teh same numbers shows there's no input lag :)