Re: 6800nu agp to 6800gs agp?
have you done any research at all? you are talking about spending over $200 on an incremental speed boost. going to the 7800 not only gives you a substantial speed boost but lets you utilise things like transparent aliasing. it also runs cooler than the 6800core.
i assume by apps you mean games. i noticed a difference between my 6800gt @ ultra(wich is now in my wifes comp) & the 7800gs. do not know if you will(though you should) because there are to many variables involved.
imo, anybody that is willing to spend over $220 on an agp card & does not wait to come up with another $70 to buy the 7800gs is really missing the boat.