7800go Drivers/Performance

Hello I'm using an Inspiron e1705 with a nVidia 7800go video card. The card acted fine for about 5 months then the frames per second started to decrease in all of my games. I searched for new drivers but the only drivers that exist for this graphics card are from January of 2006. Does anyone know of any forceware drivers or tweaked drivers that I can download to improve my FPS? Also the graphics card seems to be running hotter than it used to. I had it inspected and there is no dust build up or anything like that. As far as I can tell, the card is just spontaneously running hotter than when I got it a year ago. When my card started running hot, my battery died and I never have this laptop unplugged from the AC adapter except maybe 2 times a week for school. Does the graphics card heat and battery death have any connections to each other? Any help on this topic would be much appreciated. Thanks