I decided on going dual HD5770's. Just curious now how to compare what I have now to the new ones I should have next week. I have 3dmark tests saved and may run a few more to get a good baseline before the new cards get here.
1) download Fraps
2) get a game(s) that does not rely on a broadband connection, single player FPS / RTS (Far Cry2 works great)
3) set game levels to a taxing setting (less then 20FPS)
40 set Fraps to capture min/max/avg for 120 seconds, run a constant benchmark 3x in a game
once you install the 5770s do the same thing, then compare
3dmark is really nothing more then a pissing contest, ATI/Nvidia constantly improve their drivers to up 3Dmark scores but if you are a gamer then you want to know "how well will it run my game" and not every card will run a game the same way.
Your 9800GT can beat a 4850 in some games that over whelming prefer Nvidia cards even if the 4850 has a much higher 3dmark score. Of course, the 4850 is the better all around card.