MacPro RAID SLOW?

I keep reading Disk Whack test results online using Aja's System Tester with setups just like mine and my results are pitifully slow. I have 2 Seagate 750 GB 7200rpm drives setup in a Raid 0 stripe and an Apple Raid Card. With NOTHING on the drive I'm getting roughly a write speed of 78MB/s and a read speed of about 90 MB/s. Everywhere else I've seen this config tested using all the same parameters I'm seeing results more than double that. I called Apple support and got nowhere. Any ideas would be GREATLY appreciated. I'm thinking of going with a CalDigit Raid Card and drives but I still want to know what's up with this config first.

I get almost identical readings on the RAID at 60% capacity and at 0% capacity. 78 write and 90 read.
Here is my Raid Utility setup. Maybe someone can spot an issue in here:
Mac Pro RAID Card:
PCI Slot: Slot-4
Hardware Version: 1.00
Firmware Version: M-2.0.3.3
Expansion ROM Version: 0018
Shutdown Status: Normal shutdown
Battery Info:
Firmware Revision: 1.0d19
First Installed: 3/8/08 12:19 AM
Last Date Conditioned: 10/22/08 1:41 PM
State: Working battery
Fault: Normal battery operation
Status:
Charging: Yes
Conditioning: No
Connected: Yes
Discharging: No
Sufficient Charge: Yes
Drives:
Bay 1:
Product ID: ST3750640AS P
Serial Number: 5QD1PT1P
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-1
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
Bay 2:
Product ID: ST3750640AS P
Serial Number: 5QD1P9X5
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-2
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
Bay 3:
Product ID: ST3750640AS P
Serial Number: 5QD1P96S
Firmware Revision: 3.BTH
Type: SATA
SMART Status: Verified
Capacity: 698.64 GB
RAID Sets: R0-2
Status:
Assigned: Yes
Failed: No
Foreign: No
Missing: No
Reliable: Yes
Roaming: No
Spare: No
RAID Sets:
R0-1:
RAID Level: Enhanced JBOD
Capacity: 698.45 GB
Available Capacity: 0 bytes
Drives: Bay 1
Volumes: Vol-R0-1
Status: Viable (Good)
R0-2:
RAID Level: 0
Capacity: 1.36 TB
Available Capacity: 0 bytes
Drives: Bay 2, Bay 3
Volumes: R2V1, Vol-R0-2
Status: Viable (Good)
Volumes:
R2V1:
BSD Name: disk3
Capacity: 698.57 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-2
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes
Vol-R0-1:
BSD Name: disk1
Capacity: 698.45 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-1
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes
Vol-R0-2:
BSD Name: disk2
Capacity: 698.45 GB
Read Command Size: 2 MB
Read Ahead Margin: 16 MB
RAID Set: R0-2
Status:
Degraded: No
Inited: Yes
In Transition: No
Viable: Yes

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