I am using the onboard nforce controller. System specs:

x2 3800 @ 2.6ghz
evga nf41
1gb geil ultra @ 1:1
2x 74gig ADFD raid0
X-Fi Fatality
Benq 1640

Command queing on or off gives the same results. Stripe size I left at Optimal, which I believe is 64kb with the current bios. Will verify when I get home. The speed doesn't necessarily bother me, but the flat graph leads me to believe something is capping me. Any ideas?

Thanks,
Flak