I just bought a machine with a ATI Radeon HD 5770 GDDR5. My plan is to run 3 Dell ST2410 24-inch monitors on it. I now need select a displayport -> DVI dongle to run the third monitor. I have spent the past day reading up on these and cannot find consistent information. In particular I have read:
In addition, ATI has a list of "ATI Eyefinity Validated Dongles" at http://support.amd.com/us/eyefinity/Pages/eyefinity-don... however (1) there are reported issues (the same as with the other dongles with some of these -- in particular even the expensive USB powered adapters have reported issues) and (2) I can't find any of these adapters avalible for sale anywhere (despite the buy now links on the page). In particular the page that google is aware of that references Accell B087B-001B is the amd list! Note that the numbering on this is a bit off from the amazon product listed above.
Since these issues have now been around for several months, I was hopeful that people could give more definitive advice. If you are using a particular adapter please share what it is, what your setup is and any problems you are having.
If you are running 3 DVI monitors you need an Active Dongle, which is one that has a USB adapter to power it, or an external system (housing, etc), the ones that look like a little adpater that's about an inch or two long, won't work for 3 DVI.
You can use a passive adapter for a single VGA output, but you need to read the threads about setting them up properly, and they are finicky.
No, because it needs a timing signal (associated with the TMDS) for the independent DVI. For 3 DVI you need an active adapter, only if you use VGA (which runs off of the RAMDACs) would you be able to use a passive adapter, and even then configuration is tricky.
BTW, why didn't you post this in your own thread where I already mentioned this?
Kinda deprives that thread of the additional information, especially after that other post being picked as the 'best answer', which is just going to cause more headaches.