Dual monitor: converting from single monitor - which video card?

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Z Man

I have three or four Dell systems I need to convert from single monitor to
dual monitors. These are standard businesses systems running Excel and Word
in an financial office environment, so we don't need a high performance
solution. All the systems currently are running 17" CRT monitors, and I plan
on purchasing 19" LCD monitors, which I can get in the mid-$200's.

Management is very sensitive to computer expenditures. What is my least
expense method of enabling dual LCD monitors? Should I replace the onboard
video with a video card that supports two monitors? Should I add a second
video card? Or, is there an adapter that will let me use two monitors with
my current video card? I expect to purchase LCD monitors should have both
analog and DVI inputs. Thanks for any advise or thoughts on this issue.
 
Can't answer the question without knowing WHICH Dell computers. Depends on
what card slots they have. Let us know more. You cannot run two monitors
off a single port in the existing machines, but a cheap card will work.

Tom
 
You can get two cards or a single card designed to support two
monitors. I would strongly urge the later and here is why.


Most computers have a high speed slot for video - either AGP or PCI
express. They have one slot not two. You can get PCI video cards but
they are on a much slower bus and very slow. The AGP bus is either
2x/4x/8x faster and PCI Express is a 16X faster bus.

You also then have the challenge of two video drivers - in theory XP
should handle this ok, but in practise, I can't help but think it slows
things down.

If you are running Dells that do not have a dedicated video adapter
slot (AGP or PCI Express) then don't go there. There are dual monitor
PCI cards (rare to find these days) but it will just be too slow.


James
 
You can get two cards or a single card designed to support two
monitors. I would strongly urge the later and here is why.


Most computers have a high speed slot for video - either AGP or PCI
express. They have one slot not two. You can get PCI video cards but
they are on a much slower bus and very slow. The AGP bus is either
2x/4x/8x faster and PCI Express is a 16X faster bus.

You also then have the challenge of two video drivers - in theory XP
should handle this ok, but in practise, I can't help but think it slows
things down.

If you are running Dells that do not have a dedicated video adapter
slot (AGP or PCI Express) then don't go there. There are dual monitor
PCI cards (rare to find these days) but it will just be too slow.


James
Click to expand...

Yes. Been ages since I had a single head card, by co-incidence. In fact,
since I left sluggish PCI cards with no directX support, I never have. I
never chose two heads on purpose, but it seems to be so very common. My
first AGP card was in 1999, a Matrox G-400 with two heads. My Ti4200 had
two DVI capable, and my current, albeit also ageing 9600 PRO also has two
DVI capable. I would have thought, and this seems to be what you are
saying, that the integration of two heads on one card brings the advantage
of controlling two desktops and/or and extended desktop with one driver,
and/or utility (Hydravsion, for example). And the full power of the AGP
slot. But I don't know if it stresses the card?? I sometimes feel my
Radeon gets too hot using the one output. I'm tempted soon to look at a
second, for fun, but don't know if it'll meltdown if I don't ramp up the
system cooling. I suppose if you game hard on one output you shut down
the secondary? Something like that. If AGP 8x has more bandwidth than the
card can use, does that compensate for carrying two streams from the
driver? The mind boggles.


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James said:
If you are running Dells that do not have a dedicated video adapter
slot (AGP or PCI Express) then don't go there. There are dual monitor
PCI cards (rare to find these days) but it will just be too slow.
Click to expand...

That's nonsense. PCI is still more than fast enough for everything 2D
and even moderate 3D work. Of course if gaming is a concern PCI is out
of the run but for "real" work PCI is still a valid option.

That's btw the reason why there still are professional PCI cards like
the new PNY Quadro NVS 280 PCI (which replaced the Quadro NVS 200 PCI):

<http://www.pny.com/products/quadro/nvs/280Nvspci.asp>

For everything 2D there is absolutely _no_ performance difference
between PCI and AGP.

Benjamin
 
ok for what you want/need its easy to answer.

disable the built in videa card and go with pci or agp matrox card like the
G450 or any of the other matrox cards with 2 or 4 display suport.

you cant use the built in video and a agp card at same time so to make it
easy on your self and avoid problems just disable it.

like you said you dont need a high end card just something to use for office
app's so pick a card like a G450 with 32meg or more ram, they will have the
best looking 2d display.
 
That's nonsense. PCI is still more than fast enough for everything 2D
and even moderate 3D work. Of course if gaming is a concern PCI is out
of the run but for "real" work PCI is still a valid option.
Click to expand...

Gaming is "real" work. It takes more brains to figure out how to beat
a strat game than how to use bold typeface in MS Office. ;-)
 
ok for what you want/need its easy to answer.

disable the built in videa card and go with pci or agp matrox card like the
G450 or any of the other matrox cards with 2 or 4 display suport.

you cant use the built in video and a agp card at same time so to make it
easy on your self and avoid problems just disable it.

like you said you dont need a high end card just something to use for office
app's so pick a card like a G450 with 32meg or more ram, they will have the
best looking 2d display.
Click to expand...
I'll second that.
I use two systems with dual monitors, and I tried a number of dualhead
cards - but nothing beats the Matrox for simplicity and reliability in
the office.

I'd consider the 450 to be the bottom line - I've had problem with the
400 under XP.
It's also a passively cooled card, so there's no extra fan noise to
consider.

I doubt you'll need anything more for 2d work.

Regards,
 
Stephen Howard said:
I'll second that.
I use two systems with dual monitors, and I tried a number of dualhead
cards - but nothing beats the Matrox for simplicity and reliability in
the office.

I'd consider the 450 to be the bottom line - I've had problem with the
400 under XP.
It's also a passively cooled card, so there's no extra fan noise to
consider.

I doubt you'll need anything more for 2d work.
Click to expand...


I'm sure the G450 is suitable for my purposes, and I checked on Ebay and
found that it is inexpensive. It is also available in both PCI and AGP
versions. My Dell systems probably don't have AGP. However, the Matrox cards
seem to have just VGA, and not DVI. Would I be better of getting a card with
VGA and DVI, or perhaps dual DVI?
 
I'm sure the G450 is suitable for my purposes, and I checked on Ebay and
found that it is inexpensive. It is also available in both PCI and AGP
versions. My Dell systems probably don't have AGP. However, the Matrox cards
seem to have just VGA, and not DVI. Would I be better of getting a card with
VGA and DVI, or perhaps dual DVI?
Click to expand...

DVI outputs might be the best bet - more likely to remain compatible
in the long term, and you can buy adapters that convert a DVI out into
a VGA out ( I don't know that you can convert a VGA out to a DVI ).
That said, plenty of monitors still come with a vga input as well as a
DVI - and as you mentioned the monitors you were thinking of buying
have dual inputs you could save a few bob in the short-term by
sticking with VGA.

I think later versions of the G550 have DVI outputs - if you check out
the Matrox site there's a useful comparison chart that lists each
card's features.

I should point out that, for best results, it's as well to use
monitors that run at the same ( or very close ) screen resolutions.
The Matrox card allows scaling ( where two monitors use different
screen resolutions ) or zooming ( where the mouse cursor controls what
part of the cloned screen you see ), but in practice I find this to be
a less than satisfactory arrangement.

Regards,
 
Answeing my own question, which was a silly one, there are of course two
ramdacs on such cards, effectively two cards on one board, although the
vram is shared. DUH!

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