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DVI-I vs DVI-D?

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DVI-D is a DVI connector that is meant for digital signals only while DVI-I is a connector that allows both digital and analog signals.

so is one necessarily better than the other?
 
DVI-A has analog signals.
DVI-D has digital signals.
DVI-I has both.

The DVI ports on the back of old Mac minis were DVI-I: you could attach a DVI-I-to-VGA adapter.
The DVI ports on mDP-to-DVI adapters are only DVI-D: VGA adapters don't work.

If you're using digital, there's no difference: just regard DVI-I ports and DVI-D as the same.
Motherboard DVI ports even if they're DVI-I are typically only supported as DVI-D on CustoMacs.

The next question is for when you need to support large monitors (e.g. more than 1920 pixels on the long edge) as single-link DVI-D tops out at 1920x1200. If your graphics card supports dual-link DVI-D then it runs a second set of signals down some extra wires to support 27" and 30" monitors of up to 2560 pixels across, just as DisplayPort can.

http://en.wikipedia.org/wiki/Digital_Visual_Interface
 
DVI-A has analog signals.
DVI-D has digital signals.
DVI-I has both.

The DVI ports on the back of old Mac minis were DVI-I: you could attach a DVI-I-to-VGA adapter.
The DVI ports on mDP-to-DVI adapters are only DVI-D: VGA adapters don't work.

If you're using digital, there's no difference: just regard DVI-I ports and DVI-D as the same.
Motherboard DVI ports even if they're DVI-I are typically only supported as DVI-D on CustoMacs.

The next question is for when you need to support large monitors (e.g. more than 1920 pixels on the long edge) as single-link DVI-D tops out at 1920x1200. If your graphics card supports dual-link DVI-D then it runs a second set of signals down some extra wires to support 27" and 30" monitors of up to 2560 pixels across, just as DisplayPort can.

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Thanks. So what wire would be most beneficial DVI cable to get the most out of a EVGA graphics card and a 27' LG monitor? Would I need a dual link dvi d? Still kind of confused. I'm planning to upgrade to this EVGA graphics card and want to get the most out of my new LG monitor. thanks.

EVGA 01G-P3-2616-KR GeForce GT 610 1GB
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130788

LG E2742V-BN Black 27"
http://www.newegg.com/Product/Product.aspx?Item=N82E16824005286
 
That 27" monitor is only 1920x1080 pixels, so only needs a single-link connection. If you ended up with a dual-link cable it would work just the same as a single-link cable.
You just need plain DVI-D. Any DVI-D, DVI-I, or dual-link DVI cable would work.
 
Sure that cable would work.
Does the monitor not come with a DVI cable included? Many models do.

Only came with a VGA. One last question.

Would you know if the

EVGA 01G-P3-2616-KR GeForce GT 610 1GB
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130788

is 100% Compatible with 10.7 and 10.8? Also will it work right out of the box? Or would I need a couple tweaks to get it to work with my
GIGABYTE GA-H55M-S2H MB? Thanks again. I appreciate all your help
 
I don't know, as I've managed to get by with the HD4000 IGP in my builds which is apparently faster than that card. I've only been observing other people using cards.
But if anyone's used a GT 610 card successfully I would expect that one would work the same.
 
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