Don't quote me on this but I think it's a Geforce 7300 or something close to it in the 7xxx series.
I bought and flashed a geforce 6200 256mb for my sawtooth. Not a great gaming card but I only really play a couple older games like Oni, Quake 3 and CC Generals. Main thing for me is it fully supports quartz extreme, core image, core video and core animation in Leo. Leo loves the 256 vram also. Just 2D gui often uses 180MB+