Recently bought this monitor and when I try to set it to its 1440x900 native resolution the text is very difficult to read in that it is grainy. I have to set it to a lower resolution but in doing so the text isn't quite crisp. Do I need a new graphics card? My current one is a Radeon X300 with 128 MB. Thanks in advance. BTW, I have updated the drivers for my current card but it didn't seem to help.