Slow Load Times

[pyroball]

I built 2 systems for a LAN last week and had soe interesting problems with one and not the other. Both Quake 4 and Call of Duty 2 have excruciating load times (between 5 and 10 minutes for one map) and the other loads in seconds. whats interesting about this is that the hardware in the slow loader is a 7900 GTO @ 700/1800, 2GB PC3200, AMD X2 4200+, and almost .72TB of storage space. The fast loader has a 7600GT @ 550/1400, 1GB PC3200, AMD FX-55 and 300GB. Both computers have Q4 updated to 1.3 and there's no software issues i can detect. Ive heard of dual core CPUs having issues liek this, but the problem persists after setting the program affinity to one or another core. Ive even tried using the dual core support in the game itself but id doesnt solve the problem. any ideas?

thanks,
Alan