I did not see any improvements in benchmarks on the machine in the sig below using 2.3's. If you see something on the list that looks like it might pertain to you, go for it. Also, I was one of those users who initially saw horrible performance on the 2.31's, and I had to do a complete rebuild of my OS load on Raid 0. All is well after the rebuild. 42K HD bench on Sandra before 2.31's, 20k after 2.31's, 42K after rebuild with 2.31's. Oddly enough, when I went back to the 1203's or 2.3's, the performance still lagged, so I had no choice but to rebuild.
Fix BIOS compatibility issue with Adaptec SCSI
Show capacity by 1G=1,000,000,000 Bytes
Fix BIOS bug "drive capacity incorrect after deleting a broken array"
A few users report a decrease in performance on the KG7-RAID
Reports of much slower performance under DOS (and hence Norton Ghost)
Version 2.3 (26 December 2001)
Add support for stripe size 128K-2M
Modify driver for HPT370/370A compatibilitty
Fix reading ATA/133 disk error when PCI clock is lower than 33MHz
Fix compatibility problem with Intel IAA driver under Windows ME
Fix BIOS compatibility issue with MSI845 mainboard
Some reports of problems with the v2.3 drivers (not the BIOS) under Windows98 - if you experience these use the 2.0.1203 drivers instead.
Version 2.3 also stops the System Restore feature from working under WindowsXP - if disable System Restore, reboot, then re-enable System Restore you can do one restore point, then it stops working again!*