LCD and Video Card Compatability

I have a ATI Radeon X300[/U]. I’m wondering if this video card could handle this [U][url=]22’’ Acer LCD.
[]My graphics card’s website does not list this LCD’s optimal resolution, but does list resolutions much higher. Does this imply that I can’t use this LCD?
]Does my graphic card support dual monitors? My current 17’’ monitor is using the blue connection. Will this new 22’’ one be using the white connection?