I've been tasked with trying to make the 6000 Pro Microtower work with 3/4 monitors. The machine itself has VGA and DisplayPort outputs from the motherboard. I've installed a Radeon 4500 HD Video card, which has the ability to power 2 displays. I was thinking with the on-board outputs, I should be able to at least power an additional 1-2. I've tried different on-board drivers, but no luck.
Has anyone tried something like this with any of the HP machines?
I don't know the 6000 specifically, but on almost every HP I've seen, when you install a discrete graphics card, the on-board disables itself and can't be used. So you have to get a video card that support 3+, or get multiple cards (be mindful to get cards that play nice with each other).
Just get an Nvidia Quadro NVS card, the 420 or 450, it's a single card, works a treat and is designed for exactly this kind of thing.