[Leaplist] Monitors for the School

[Bryan J. Smith]

o  TOP POST PORTION ...

Remember, there are three (3) types of DVI:  
- DVI-A:  Analog-only
- DVI-D:  Digital-only
- DVI-I:  DVI-A + DVI-D

Ref:  http://en.wikipedia.org/wiki/Digital_Visual_Interface#Connector  


o  BOTTOM POST PORTION ...

Derek Konigsberg wrote:  
> I'm still not sure why DVI input has been considered a
> "premium feature" on LCDs (lower-end ones anyways) for
> so long.  After all, if you think about it, shouldn't
> it require *more* electronics internally to support 
> VGA input for an inherently digital display?

DVI-D, yes.  DVI-I, no.  DVI-I has both the flat panel
interface/micro-electronics as well as the legacy RAMDAC
and analogy micro-electronics -- the "cost" of both DVI-D
and DVI-A.

So DVI-D may be cheaper, and DVI-A may be the same cost as
mini-DB15 VGA, but DVI-I costs more than just VGA because
it's both DVI-D and DVI-A.

Hank Lambert wrote:
> I think they look great. Down the road if they get
> newer computers that have DVI only outputs, these
> monitors could be connected with DVI to VGA
> adapters. I believe that would work just fine for
> their use.

*IF* they have DVI-I connectors.

I'm now starting to see mainboards with just DVI-D only.
It used to be mainboards had either DVI-I or possibly
one mini-DB15 VGA plus DVI-D (RAMDAC connected to VGA).

But now we're starting to see vendors cut out DVI-A
support from their former DVI-I offerings, and ship only
a DVI-D output.

Also, while it's easy and inexpensive to create a DVI-D
output PCIe card for chipset GPU, it's much more expensive
to create a DVI-I or VGA PCIe card.  One might argue it's
cost ineffective.

o  DEFAULT CASE:  

As long as the desktops have a PCIe slot that can override
the chipset CPU, you'll always be able to find a $10 PCIe
card with a mini-DB15 or DVI-I (with the DVI-A) output.


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