My HP PC currently supports a 1280 x 1024 screen resolution. The Samsung 24" LCD monitor I ordered is 1920 x 1200. Do I need a new video card? The tech lady here at work says no, my PC will update/sync itself with the monitor. For some reason I dont believe her at all. Can someone please confirm if I need to buy anything to support the 1920 x 1200? Thanks!