== BIOS updates ==

The Supermicro website does not list older BIOSes. It also does not list what has changed within newer BIOS releases, though Supermicro's support is fairly forthcoming with the information.

A list of BIOSes I have collected, and their changelogs:

=== 1.1b ===

[[attachment:DCE7256_1.1b.zip|Download v1.1b]]. MD5: 03e4a13d37188f1c31ff0c8ad980f594

 1. Fix a FAN control malfunction problem after AC loss.
 2. Enable workstation, quiet, super quiet fan control mode for 4-pin fan only for revision 3.1 board.
 3. Change revision to 1.1b.
 4. Pass BIOS CHECK 4.0.0

=== 1.1c (10/28/2008) ===

[[attachment:DCEA288_1.1c.zip|Download v1.1c]]. MD5: c5d7703c59013ecb719aedbf72b4c838

 1. Change FAN control by using FANOUT1 and FANOU2 instead of FANOUT2 and FANOUT3 according to hardware
 2. Change revision to 1.1C

== BIOS options ==

Some important BIOS options I use:

 * Memory settings
  * '''MTRR''': Continuous
  * '''Node interleaving''': Disabled (enables NUMA, effectively reducing latency for certain memory accesses)
  * '''Software memory hole''': Enabled (remaps PCI DMA address space away from 4 GB, which effectively makes more RAM available to the OS)
  * '''Hardware memory hole''': Enabled