Is 8337 a good 3d mark06 score

It depends on how big you want your e-peen to be.

What matters to you more? A high 3D Mark score or playing games well?

it used to be most 8800 class cards could break 10k with a decent cpu pushing it. the e6300 is at stock clocks, no? might try to o.c. a bit for higher benchies. lephuronn is right though. download fraps and see what kind of frames per second your getting in your favorite game. 20=bad, 30 = playable, 60=plenty.