Compatible Video Card?

My 6-year old Gateway 700x WinXP Pro desktop has an nVidia GeForce2 MX
400 (original) video card, running an 18" Gateway LCD monitor at 1280 x
1024 resolution. I just picked up a Samsung 19" wide screen LCD monitor
at a great price. I see that the Samsung monitor is designed to run at
1440 x 900 resolution. I notice when I click on Display Properties/Settings,
my Nvidia video card shows the highest resolution available is 1280 x 1024.
Is this going to be a problem for my 6-year old video card?

I do have a new nVidia G-Force FX 128MB DDR card that I picked up a couple
of years ago. Available resolutions include 1280 x 1024 and 1600 x 1200.
Would this be a better match?

Thanks!
Scott