24 " monitor with HD 4870 graphics card

For Christmas, I think I would change my monitor from 22-inch to a 24-inch because I play a lot of game (cod 4, Crysis, BioShock, Far Cry 2, DMC 4 and I want to have a bigger screen for a better display quality.

I have a hd 4870, so I wanted to know if the resolution with a 24 "(1920x1200) will be good for my games?
I count on your answers and your advice

That is my config:
Asus P5Q Pro
Core 2 Quad Q6600 o/c 2.7ghz
4 gb ram G skill Extreme PC 6400
Saphire hd4870 o/c limit of the catalyst control center
2 DD (Barracuda 320 and WD 500 GB)
OCZ StealthXStream - 600W
Antec Nine Hundred

Thank you all.

For a monitor from 22" to 24 ", the FPS will drop because the screen resolution is more important, but given the perf of the HD4870, I think that you do not have to worry.

thank you for your response

but the fact that the resolution is greater, it suffers less antialiasing or what?

To reason mathematically, in theory:
1640 * 920 = 1'764'000 pixels on the screen
1920 * 1200 = 2'304'000 pixels on the screen
Using a small calculation of the con (a product crosses it seems to me), we can say that your screen will be ~ 25% larger (the number of points), and it will logically fall your performance by 25%. In short, in my opinion, in 4870 and 24 "is a rather viable.