ATI 6870/6850 Finally working in target display mode

Discussion in 'iMac' started by henrikrox, Nov 6, 2010.

  1. henrikrox macrumors 65816

    henrikrox

    Joined:
    Feb 3, 2010
    #1
    Got my dual 6870 radeon on friday.

    i hooked them up with crossfire (dual x16)

    and voila, finally the comp can be connected to the imac screen without adapters or anything like that. just a single cable.

    just a heads up, cause i remember there was some pain with the 5000 series radeon cards.

    Looks great. And saved me 1000 dollars on a screen ( :
     
  2. definitive macrumors 68000

    definitive

    Joined:
    Aug 4, 2008
    #2
    so what is the point of doing that? i'd imagine it would be cheaper to just buy a ips screen instead of a $1000-2500 imac to serve as a monitor..
     
  3. Spanky Deluxe macrumors 601

    Spanky Deluxe

    Joined:
    Mar 17, 2005
    Location:
    London, UK
    #3
    I think you're missing the point here. He's already got an iMac and is using it normally but also has a PC that he wants to use with it. If he couldn't use the iMac screen with his {I'm guessing gaming] PC then he would have to have bought a separate screen and a screen of the same quality would have cost $999.
     
  4. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #4
    Good to know! Thanks! How is the performance with 6870 CF? Can you do some benchmarks?
     
  5. Rodus macrumors 6502a

    Rodus

    Joined:
    Oct 25, 2008
    Location:
    Midlands, UK
    #5
    Doesn't the 27" Imac only use 720 when used as an external display? If so then you have a lot of graphics power to run at a very low res.
     
  6. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #6
    That's with mDP to HDMI adapters. When using (m)DP to mDP, it's the native 2560x1440.
     
  7. DLary macrumors member

    Joined:
    Oct 21, 2005
    #7
    The 6870 also sends sound to the iMac so you can use the internal speakers.
     
  8. iMacN00b macrumors member

    Joined:
    Sep 9, 2010
    #8
    Hei,

    Have you done some Benchmarking yet? It would be interesting to see if the 6870 in CrossFire is able to do a good job at native resolution.

    The price is pretty good (komplett.no) but I am bit worried about performance at the resolution of the 27"

    Anyway, congrats with the purchase!
     

Share This Page