2x AGP better than 4x?

hi guys/gals

Just reporting a small oddety with my SIS 315 64mb 3d card:

3dmark 2001 se results:
2x AGP: 1673
4x AGP: 1663

both were done with a freshly booted system

Maybe it’s the sucky SIS drivers?

The results do not stay constant. Also turn on fast wright it will hels bost the stats that is what is aded to 4x