nephilim666
I'm not familiar with the PAM utility you referred to, the Promise site explicitly says that they do not provide support for Promise on-board SATA contolllers.
In Device Manager, my Drives show up as SCSI devices... Promise 2+0 Stripe/RAID0 SCSI Disk, does yours show the same?
I'm not sure if the PAM utility is a reliable tool for benchmarking your RAID setup... try downloading SiSoftware Sandra 2003
http://www.sisoftware.net/ and then running the file system benchmark test.
I get a value of around 48000 when I run the File System benchmark with my RAID array and yours should perform in that general area as well.