If you are talking about a 9300, 65w is totally fine. If you look underneath your 9300, you should fine a place that says it is compatible with both the PA-10/12 adapters. The PA-12 adapter is a 65W adapter.
OK....just did a 2M test with my desktop and 700m. Here are the scores:
700m (PM 1.8GHz) - 2m2s
Desktop (P4 3.2GHz) - 1m41s
9300 (PM 2.0GHZ) - 1m33s
From my scores, it seems like the multiplier between the Pentium M's and P4's is approximately 1.7.