You'll neva walk alone! said:
intel 845 mainboard with 512mb ram,
CPU: Intel HT
old one
thanks
You need a video card with two connectors. They're called
"dual head", but it may not say that in the advertisement.
You want the connector type on the card faceplate, to be useful with
the monitor. The monitor may have a VGA 15 pin, or it may
have a DVI-D or DVI-I connector on it (digital input). When you buy a
video card, make sure you can connect the monitor. (Note that
some video cards, come with a DVI-I to VGA adapter plug, which
converts a DVI-I connector to 15 pin VGA.)
http://en.wikipedia.org/wiki/Dvi
The 845 supports an AGP video card slot. Some cheap
boards, may use the 845 chip, but not actually have
an AGP slot connector soldered to the motherboard.
Let's say there is an AGP slot. You look up here, to see
what type of video card to use.
http://www.playtool.com/pages/agpcompat/agp.html
845 is "AGP 1.5V Motherboard". If you look in the
"Practical Motherboard And Card Compatibility" table,
that will work with everything except a "3.3V only"
video card. So it has broad compatibility.
AGP cards are listed here. Note that some don't even have
two big connectors on them, so they're "off the table" right
away. Some have one VGA and one DVI-I, which is OK if you have
two VGA monitors, or one VGA and one DVI-D.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048+1069609639&Subcategory=48
Example of a card. This card has two DVI-I connectors. You'd
need two DVI-I to VGA adapters, if you wanted to drive two
VGA 15 pin monitors. The box includes only one DVI-I to VGA
adapter.
http://c1.neweggimages.com/NeweggImage/productimage/14-121-222-04.jpg
The card is keyed for "1.5V only", and the 845 is also set up
for 1.5V only. Note the slot cut and its location, on the AGP
connector. This should fit into your AGP slot, without the key
bumping into the connector.
http://c1.neweggimages.com/NeweggImage/productimage/14-121-222-03.jpg
These are the bundled adapters. The DVI-I to VGA is the one
I'd want to see included in the package. Only one is included,
so I'd have to shop for a second one, if using two VGA monitors.
http://c1.neweggimages.com/NeweggImage/productimage/14-121-222-08.jpg
If you're going out today, and buying two LCD monitors, the
cheapest monitors have no VGA connector, and only have the
DVI-D connector. In which case, the DVI-I to VGA adapter
dongle is not a consideration. How important the dongles are,
depends on the mix of monitors.
To see what it is like, to see up dual monitors, see a doc like this.
See figure 5.12 on PDF page 88, for "dual view", "span", and
"clone".
ftp://download.nvidia.com/Windows/Quadro_Certified/91.36/91.36_Forceware_nView_Users_Guide.pdf
HTH,
Paul