Matrox M series, or you can try the Kensington Dual Adapter, which allws up to six. Never had six on it, but have seen them with three at trade events.

Initially, people would use two monitors on a single card and then output DV through a camera or other converter to a video monitor. That'd give you three screens total, one of which was a standard def monitor.

Later, Vegas added support for sending the preview to a secondary screen attached directly to your system's graphics card, which I assumed was intended to let users see full screen HD preview on an LCD monitor. Kind of a poor man's HD preview since the rich man would be outputting over SDI to an HD studio display.

XP and Vista both provide support for more than one graphics card in a system but the driver model for Vista requires that all the graphics cards use the same driver. So you could use mismatched nvidia cards, or mismatched ATI cards, but you can't use an ATI and an NVIDIA card because that would require two different drivers.

Some graphics cards have enough grunt to output a really high resolution screen that can then be split into two screens with an adapter. I'm assuming that's what the Kensington Dual Adapter does (without looking it up). A few of our edit stations at work split out into dual screens this way. Such cards are described as Dual Link cards, which is not the same as having dual DVI connectors on a card. A dual link DVI connector is a single connector with (nearly) the maximum possible number of pins. See http://en.wikipedia.org/wiki/Audio_and_video_interfaces_and_connectors#DVI_Connector

Rob Mack

>How do you guys connect three monitors to yur PC?

I have one Matrox Milennium P750 to which I have connected two monitors, and one Matrox Milennium P650 Low-profile PCI to which the third monitor is connected.
All monitors are 1600 x 1200 Eizo, and this system, has been running flawlessly for more than three years now. BTW, I have one lanscape oriented monitor in the middle, and the left and right monitor in portrait mode. I am very satisfied with this setup.
I do not run Vegas on this PC, but since you ask, this is how I did it.

ingvarai

Windows will run as many displays as you can plug in adapters. But, I strongly recommend that the adapters all be from the same manufacturer, same model if possible. This way windows will only need one driver.