DVI-D Dual link

[He111]

Not sure if anyone here will know but i've noticed the Koreans are selling a cheap 27" monitor 2560 x 1440 for $300 .. but it only has a single DVI-D dual link connection. My 2 x GTX 580 GPU cards have 2 x DVI-I and 1 mini HDMI connections...

Will this monitor work on my computer? do i need to buy a special cable 2 x DVI-I plugs join into 1 DVI-D dual plug?

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[Kodoss]

Your DVI-I connectors should be also dual link, or you wouldn'd be able for 2560x1600 with one DVI-I Cable.

Just buy a DVI-D Dual link cable put it on the monitor and into your DVI-I slot of your graphics card.
Don't try to put the DVI-I cable into DVI-D slot of the monitor. It will not work, because the ground pin by DVI-I is bigger than DVI-D Slot.

In Short:
DVI-D cable(pins) + DVI-I graphic card(slot) = OK
DVI-I cable(pins) + DVI-D monitor(slot) = false

PS: I also have a DVI-D cable on my HD6990(DVI-I) because the monitor has only DVI-D. Res: 1920x1200.

[He111]

Thanks! you seem to be the first person who knows what he's talking about .. but i've just re-read the advert, it mentions something about an add-board? (by pass monitor ?).. and mentions DVI dual port works only ? (see picture)

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[Kodoss]

If you look into Wikipedia and search for DVI, you might find this Pic.



There it shows:
DVI-I single and dual (those ones with the 4 pins on ground[big pin])
DVI-D Single and dual (those without 4pins on ground[big pin], groundpin is also smaller)

If you have a DVI-D cable with 8x3 small pins, then its dual (the one you need).
Just to make sure you understand what I ment: You need one DVI-D (dual link) cable. Not 2 cables and no additionally adapters.

Monitor-sLot: DVI-D (dual link slot) + Cable-pins: DVI-D (dual link pins) + VGA-slot: DVI-I (dual link slot) = OK
Any other cable won't work.

Or You by one of these adapters for your already existing DVI-I (dual link) cable, which nearly costs the same as the cable....

[He111]

yeh, ok -D and -I are red-herrings, the only thing you need to know is - Dual-Link .. and it works perfectly!

CLOD @ 2560 x 1440 on a 27" looks VERY impressive!

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[WTE_Galway]

Originally Posted by He111

yeh, ok -D and -I are red-herrings, the only thing you need to know is - Dual-Link .. and it works perfectly!

CLOD @ 2560 x 1440 on a 27" looks VERY impressive!

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Correct

The difference between the two is DVI-I incorporates DVI-D plus also an additional separate analog signal to make the connector backwards compatible with older standards like VGA. Note how the four analog connectors on the LHS of the DVI-I diagrams above are missing on the DVI-D diagrams.

Basically, unless you are using an old analog screen or similar analog device (and hence will need DVI-I plus a special analog dongle) there is no difference as the digital pin-outs are identical on both standards.