question about 3 monitor setup?

[Harrypott]

Running an ATI 5800 Series (5870 maybe?) with
24" Dell on DVI
23" Dell on DVI
23" Dell on display port (monitor has a display port)

It works perfectly but have to unplug the display port screen when I turn on the computer or the ATI card's fan goes nuts and doesn't get a display on any of them. I didn't get any usb cable thingo to get extra power with my card. Been running with three screens off it for some time now.

[Sajuuk]

....... just posted a huge post and i lost it. GFD reposting.


Simply cut down.
I'm using 2x ATI 6870s and 3x samsung 23" px2370s.
If you use an Nvidia card, you have to have a 2nd card to use 3+ displays.
If you use an ATI card, you have to have an ACTIVE display port adapter.
The ATI cards only pull enough power to power 2 of the hdmi or dvi ports. Attempting to use the third port will simply not work. Also, the active display port adapters come with a display port plug and a usb to draw additional power from the mother board. I suggest plugging that into any generic USB power adapter if you wish to have consistent power to your monitor without flickering.

Any further questions, let me know.

So I forgot about the active adapter, sorry. And just for lulz it's not a power issue that only allows use of either two dvi or one dvi/hdmi. I think it's a clock issue, I don't recall the details, but it's NOT A POWER ISSUE, if anything it's a limitation on DVI or some nonsense like that.

The OP has two monitors right now, he could add a third. To not need an active adapter he could just get a monitor with displayport on it. I think ATI has worked towards having less expensive validated displayport adapters.

OH LOOK, A LIST (from ati, yay!)

http://support.amd.com/us/eyefinity/...y-dongles.aspx

One of them ( a single link ) is only 30 dollars!
http://www.amazon.com/Accell-B087B-0...3847521&sr=1-1

I wish I could have read your huge post.

Running an ATI 5800 Series (5870 maybe?) with
24" Dell on DVI
23" Dell on DVI
23" Dell on display port (monitor has a display port)

It works perfectly but have to unplug the display port screen when I turn on the computer or the ATI card's fan goes nuts and doesn't get a display on any of them. I didn't get any usb cable thingo to get extra power with my card. Been running with three screens off it for some time now.

Sounds like an issue with your card, I have no fan issues.