SteveRo: What motherboard are you using? I am trying to figure out why my results are so bad. I have the ARC-1880-ix-12 with 4GB of cache connected to 5 x C300 128GB in a RAID 0 config. I even used the same raid config you used. When I run AS SSD I get sequential reads of 1200MB read and 1400MB of write (sorry at work right now and dont have any screen shots) This is the second card I tried, I originally thought there was an issue with the first card but it appears to be clear there is something with my config that is causing a bottleneck of some sort. The odd thing is when I use my ARC-1231ml with 4GB of cache my read speeds are higher. I receive read speeds of nearly 1500MB of read and write speeds of 1400MB. Those speeds are probably normal because of the limitation of the 1231ml. I have also removed all cards from my system (except video and RAID) and I am not getting any improvements.
For testing I have also enabled JBOD and tested all 5 drives. They all bench out around 350mb so seperately they appear to be OK.
Any thoughts / suggestions you may have would be appreciated.

Thanks,

Randman76


EVGA X58 Classified 4-way SLI
Intel 980X (OC to 4.2 GHZ)
12GB DDR3 Corsair RAM (8-8-8-24)
(2) EVGA 480 GTX SLI
ASUS Xonar DX2
ARC-1880-ix-12
Antec 1200 PSU
5 x C300 Crucial (128GB)