1st, let me say that this is the fastest ANYTHING has ever been delivered to me by woot.
I figured out what's going on with mine. I was set to 1920x1280 over a VGA cable.
You can pass it 1920x1080 (P) and (I) over HDMI, but there is all kinds of artifacts. I think you can see the pixels, but they are not pretty, and a lot off them are hidden around the edge.
My NVIDIA control panel has two sets of resolutions for it, "HD-SD" and "PC". It's max size under PC is 1280x1024. I believe that is what the LCD panel is. The rest is smoke, mirrors and re-sampling.
I'm OK with that, as I bought it a TV, but don't have everything set up for it yet, so PC was the quickest check.
It is the best 1280x1024 monitor I've ever had. :P
Oh, and the packing sucks. There is one layer of regular cardboard around it, with styrafoam blocks on the corners and a really thin styrene foam bag around it. It was packed to be handled in bulk by people who here shipping monitors, then put on a shelf. It was not packed to be pieced out and run through the "don't care if it's fragile" quicky delivery company.