1440x900 eMachines E19T6W

[TiToBoii]

I got this brand new monitor for x-mas and its good. But when i play games the visuals look like the AA is turned off and it look choppy as hell. Before I had an old monitor, the big fats ones, and it goes up to 1280x1024 and for some reason that looked really smooth and a lot better looking that my new monitor.

every game is like this, Cod 4 Cod WaW, L4D, All Source games Company of Heroes. All up to highest resolution all AA turned up everythings on high setting with high AA still looks like crap and choppy visuals.

can i fix this?
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Manufacturer: Gateway
Processor: Intel(R) Core(TM)2 Duo CPU E4700 @ 2.60GHz (2 CPUs), ~2.6GHz
Memory: 4.0GB RAM
Hard Drive: 151 GB
Video Card: NVIDIA GeForce 9800 GTX/9800 GTX+
Monitor: eMachines E19T6W HD-Ready Monitor
Sound Card: Speakers (Realtek High Definition Audio)
Speakers/Headphones: Logitech Universal 3-in-1 Headset MadCatz USB Headset / 5.1 Z Surround Sound Speakers
Keyboard: USB Root Hub
Mouse: USB Root Hub

Operating System: Windows Vistaâ„¢ Home Basic (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.080917-1612)