433 points for a 7600 GT is normal.
Look at the comparative table:
http://www.ozone3d.net/benchmarks/fur/#comptable- 6600 GT: 267 points
- 7600 GS: 474 points
- 8600 GT: 526 points
These scores are more average values than exact ones but they show you if you graphics card is okay or not. For me, you system is ok.