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I've got a 24" 2.4 Ghz Core 2 Duo iMac. It's about 18 months old, though I can't specifically remember when I bought it. It has a Displayport Mini-DVI socket on the back, and currently I have that linked to a DVI adaptor driving a Philips 20" widescreen monitor in portrait mode (awesome for browsing).
I have another, identical Philips monitor and wondered if there was a way of connecting that to the iMac too. Is there such a thing as a DisplayPort Mini-DVI to dual-DVIs adaptor?
Can this iMac's graphics card even drive such a set-up? The graphics chipset in the iMac is reported as ATI Radeon HS2600, 256 MB.
The main iMac display is 1920x1200 and the Philips display is 1050x1680 (@60Hz, rotated 90 degrees). The third screen would be another 1050x1680 and ideally I'd have it portrait again, too.
EDIT: Please let this question stand - it's not a dupe. The current Mac laptops use 'Mini Displayport' connectors, which are not the same as DisplayPort Mini-DVI connectors.
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dupe: http://superuser.com/questions/19047/can-the-new-macbook-macbook-pro-support-dual-external-monitors
– fretje – 2009-08-06T14:28:45.5071It's NOT a dupe - the laptops have a different physical kind of connector to the iMac (which is a desktop). I should know, I also have a new MBP laptop here and not only does it have a completely different graphics chipset, it uses a 'Mini Displayport' adaptor, not a 'Displayport' adaptor. :-) – robsoft – 2009-08-06T19:04:52.097
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@robsoft Current 'Alu' iMacs use the exact same Mini DisplayPort as seen on the laptops. Previous ones used a mini-DVI port which required a mini-DVI to DVI/VGA/etc. adapter. Either way you require a mini to full size adapter before you could split the signal. See http://www.apple.com/imac/specs.html
– Chealion – 2009-08-06T19:51:37.4901@Chealion - thanks, you're right - I was confusing the issue. My iMac has a mini-DVI connector, not a Mini DisplayPort. Many thanks for correcting me - no wonder people couldn't understand my point. :-) – robsoft – 2009-08-06T20:42:23.610
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IF the connector is the same then your answer is here http://superuser.com/questions/14116/is-it-possible-to-connect-a-macbook-to-two-monitors
– Bruce McLeod – 2009-08-06T21:13:26.000@Bruce - thanks. It's not the same connector, but the question you linked to does include some useful info anyway. Thanks! – robsoft – 2009-08-07T07:01:01.863