This is what I have received in mail and hope this information will help other people out there wondering at SuperM's infinite wisdom of keeping users in the dark. I will postpone the actual upgrade till all other unfinished business could be settled because the upgrade has already caused one premature RMA.
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BIOS Rev 1.2a Update: CBXPC198.ROM Date:12-19-2008 ver. 1.2a
1. Add menu item "CPU Overheat Alarm". (All X7 & C2 Phoenix BIOS Project)
2. Fix system can't boot with IEEE 1394 card. (All X7 & C2 Phoenix BIOS Project)
3. Support BIOS editor change BIOS default BOOT order. (All X7 & C2 Phoenix BIOS Project)
4. Support BIOS editor can set default supervisor password. (All X7 & C2 Phoenix BIOS Project)
5. Add BIOS revision in setup menu. (All X7 & C2 Phoenix BIOS Project)
6. Add DMI event log to log system error event and IPMI event log. (All X7 & C2 Phoenix BIOS Project)
7. Microcode updated. (All X7 & C2 Phoenix BIOS Project)
8. Fix system can't boot from Compact Flash card via IDE or IDE-to-SATA adapter.
9. Fix AHCI mode SATA hard drive detection issue.
10. Enable hard drive S.M.A.R.T. feature.
11. Set add-on slot PCI bus master default to enable.
12. Only display warning message for keyboard error. (C2SBX/C2SBX+)
13. Fix USB keyboard hang up on USB 2.0 HUB issue.
14. Add setup item to enable/disable EHCI controller.
15. Fix S3 resume issue.
16. Enhance 1600MHz XMP/non-XMP memory support. (All X48 chipset)
17. Fix BIOS display incorrect memory size in POST screen.
18. Add PCMCIA (CARDBUS) device support.
