No problems at all.
If you have regular PCI slots then you can use either 1 4-port card or 2 2-port cards.
One thing to keep in mind is ATI cards are not as compatible as others. nVidia cards often will work with Matrox but not always.
So if you can, try to stay with same manufacturer or same type of cards in whole system.
Like I said for MS Vista, video cards are trickier. But with XP, less so.
As for which ones to buy...
New...
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130289
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130466
Used...
http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=matrox+g450&_sacat=See-All-Categories
You can get a couple of used Matrox g450 2-port fanless cards for $10-15 each. The only thing about them is they won't allow you to tilt your monitor in "profile" mode, other they're the cheapest way for pci slots and good for trading.
Another option would be a used Matrox g200 pci for $30-40
I initially was buying cards with fans but have grown tired of the noise so wouldn't recommend them for trading.
The nVidia NVS series are good but a more pricey option.
If you have regular PCI slots then you can use either 1 4-port card or 2 2-port cards.
One thing to keep in mind is ATI cards are not as compatible as others. nVidia cards often will work with Matrox but not always.
So if you can, try to stay with same manufacturer or same type of cards in whole system.
Like I said for MS Vista, video cards are trickier. But with XP, less so.
As for which ones to buy...
New...
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130289
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130466
Used...
http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=matrox+g450&_sacat=See-All-Categories
You can get a couple of used Matrox g450 2-port fanless cards for $10-15 each. The only thing about them is they won't allow you to tilt your monitor in "profile" mode, other they're the cheapest way for pci slots and good for trading.
Another option would be a used Matrox g200 pci for $30-40
I initially was buying cards with fans but have grown tired of the noise so wouldn't recommend them for trading.
The nVidia NVS series are good but a more pricey option.
Quote from thinkingfield:
good advice for the fans, the power fan already bothers me!
i have several open regular PCI slots, do you have any performance problems working with the 4 monitors across 2 cards in PCI slots?