I have the NEC 3090. It is my understanding that the monitor looks and functions best when running at its native resolution, which is 2560x1600 pixels, at 101 pixels per inch. You have a monitor that displays almost the entire AdobeRGB gamut with excellent color rendition. It would be a shame to run it at a resolution less than its native resolution. You can buy a card such as the nVidia Geforce 9800GT with 500mb of video ram for under $100 that can easily run the NEC 3090 at full resolution and have enough video ram to take advantage of the new Photoshop's ability to use the video GPU.
In addition, the NEC does much better on a DVI-D cable, and I suspect you have to run it on DVI-I right now, which gives you an analog rather than digital signal.
I'm feeling a little "stupid" here. Maybe you can help me out ....
I am going to be purchasing a new MacPro computer in a couple of weeks to run this beast of a monitor. I had intended on buying the NVIDIA GeForce 8800 graphics card. Do you know if this will run the monitor at 2560x1600? Apple does not offer the NVIDIA 9800GT as an option. Would I be better off not upgrading to the 8800 when I order the computer, and buying the 9800 card?
What are you referring to when you talk about Photoshops ability to use the video GPU (what is GPU)?
I am running the monitor with one of the two cables that came with the unit -- the DVI-D (Duallink cable). So I am not using the analog cable.