Can't get 3 screens to work together - Help!

miceormen · 21 Mar 2013 at 12:56

Hey guys

Per my previous thread: http://forums.overclockers.co.uk/showthread.php?t=18495890

I bought a Mini DP - HDMI adapter and plugged it into my Twin Frozr 7850..

So now my gfx card has the following sticking out the back:
HDMI -> 37" Samsung telly
DVI -> 23" Samsung Monitor
DP -> HDMI -> 24" Samsung Monitor

Plug everything in, Windows recognises all three.. CCC recognises all three.. But neither program allows me to make more than 2 work at the same time.

I want to be able to use my dual monitors as normal on my desk and have the desktop extended to the telly which is on a table by my bed, so I can move movies / windowed games to it as and when.

What do I do?

Cheers

oweneades · 21 Mar 2013 at 13:25

For the third monitor the adaptor needs to be active regardless of whether it is DP to HDMI or DP to DVI (same signal but no sound on the latter).

Assuming the monitor accepts DVI (the one you have the adaptor on) then this is what you need:

http://www.overclockers.co.uk/showproduct.php?prodid=GX-058-HS&groupid=1929&catid=1757

miceormen · 21 Mar 2013 at 13:34

Unfortunately the monitor is this one with only HDMI and VGA.

Its odd because once I disconnect the TV (HDMI -> HDMI) both monitors work.. So clearly the non-active DP - HDMI adapter is working... Why can't all three work together?

anthony566 · 21 Mar 2013 at 21:11

Are you running in crossfire ?

spoffle · 21 Mar 2013 at 21:15

miceormen said:
Unfortunately the monitor is this one with only HDMI and VGA.

Its odd because once I disconnect the TV (HDMI -> HDMI) both monitors work.. So clearly the non-active DP - HDMI adapter is working... Why can't all three work together?

I think it's something to do with the signal being re-routed. Whereas the active ones don't do this.

Armageus · 22 Mar 2013 at 09:52

Without using native displayport monitors or active adapters I think the best you can do from recent ATI cards is 2x Digital sources + 1 Analog. The only cards without this limitation as far as I know are the Sapphire Flexx cards (I have a 6850 Flex at work that runs 4x DVI's -2x DVI + 1x HDMI->DVI and 1xDP->DVI)

I would suggest:

DVI->VGA Adapter for the monitor that has analogue
Mini-DP to DVI Adapter for second monitor
TV connected via HDMI

miceormen · 22 Mar 2013 at 15:14

Ordered an active adapter yesterday, bit of luck one's turned up today so will see how it goes when I get back from work.

No, I'm not running crossfire, its just a single MSI Twin Frozr (II?) 7850 2gb.