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
Download v1.1b. MD5: 03e4a13d37188f1c31ff0c8ad980f594
- Fix a FAN control malfunction problem after AC loss.
- Enable workstation, quiet, super quiet fan control mode for 4-pin fan only for revision 3.1 board.
- Change revision to 1.1b.
- Pass BIOS CHECK 4.0.0
1.1c (10/28/2008)
Download v1.1c. MD5: c5d7703c59013ecb719aedbf72b4c838
- Change FAN control by using FANOUT1 and FANOU2 instead of FANOUT2 and FANOUT3 according to hardware
- 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
