My monitor resolution is set to 1920x1080, but when I run SC2, the highest resolution I can put it on is 1280x1024.... Why is that? O.o

Maybe this should go in the tech forum, but whatever...

What video (or graphics) card did you put in your new rig? Are it's drivers fully updated?

I've got an ATI Radeon HD 4380. I updated the drivers and I can set my desktop to 1920x1080, so I don't understand why SC2 is being odd.