GAMIT runs much slower in notebook than in desktop PC.

The desktop PC configuration:
AMD Athon 2500+ CPU (1.8GHz)
512M DDR-333
Maxtor Harddisk 7200RPM 40G
Windows XP Pro SP2
VMWare Workstation 5.0
Guest OS: FreeBSD 6.2 (256M RAM)
GAMIT/GLOBK V10.30

The notebook configuration:
Duro Core 1.66GHz*2
T5500
Toshiba 5400 RPM 80G
1G DDR-II 667
Windows XP Pro SP2
VMWare Workstation:
Guest OS: FreeBSD 6.2 (308M RAM)

It seems that it took more time for GAMIT to get a solution in notebook than in desktop PC. Should notebook be only used for word processing and entertainment? I had thought that notebook was a good choice for running GAMIT.