Why does my RAID seem slow??? HELP

Im debating whether keeping this RAID or not.
This is the RAID of 180GXP's that benches at 101MB/sec Sustained rate..I just made a post about.

When I load a few games...it comes to a CRAWL compared to loading it off a single drive
Example:
Max Payne - it gets to bout 75% loaded then takes 5 minutes to load the rest!?!?! on a single drive this game loads maps in seconds.
Everquest - its slower loading the game when u tell it to cache textures then it was on my single drive...

I have the RAID partitioned just like my 120JB was..
c: (OS and utilities) is 29GB
z: (SWAP) 800MB FAT32
f: (Games) 50GB

Now, I noticed that the cached read score in PCMARK2002 was horrible, its around 25-35MB/sec...
If thats the case and this RAID is reading cached stuff, is there any way to disable the cacheing? or something....

Thanks

What OS are you running.
Also try to update your drivers, I had that problem till I did once.