Adaptec Slow Performance and the Power Domain Firmware Update

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I just purchased a PowerTower Pro with a RAID setup, and it is much faster than my other PowerTower Pros that I got a few months ago. When I go to the PowerDomain Control Panel and highlight the PowerDomain 2940W card, I see version 1.0 on the slower machines, but 2.0 on the fast one. When I highlight the board in the PowerDomain control panel and choose Set Target Options in the Board Menu, I cannot check the UltraSCSI box in the lower left on the slow machines, but on the fast one, it is already checked. What is happening?
If you are experiencing this issue you should download the PowerDomain firmware update from Adaptec's website, familiarize yourself thoroughly with the Read Me, and install the firmware update accordingly. The most recent version is 2.5, and can be obtained at ftp.adaptec.com/pub/BBS/PowerMac/.

Machines Affected: All
Published Date: Feb 20, 2012