graphics card for large monitor

[BigBiceps]

I have an Intel 82810 graphics controller.
http://support.intel.com/support/gra.../CS-009122.htm

How do I know if I can get 1600 x 1200 for poker if I get a new monitor? I don't understand what it is talking about when it says "some monitors and/or systems may not support the full range of supported resolutions and refresh rates". I understand about the monitor part, but what could not be supported with my system. It is somewhat old, but will it work? 900 mhz, 128 MB ram, 20 GB HD.

Either the Dell 2100 fp, or something like this one below from costco.

http://www.costco.com/Browse/Product...rodid=10042639

[BigBiceps]

Also note,

It is the Intel 810 chipset.
Intel® DirectAGP 3D (810 shared)

And it is on board not a seperate slot if that matters.

Thanks, if anyone can help.