Overview of order no.'s and current releases of the BIOS:

Order Number	Software- release	Upgrade with ...	Use with Basis Image
6ES7677-1DD00-0BA0 6ES7677-1DD00-0BB0 6ES7677-1DD00-0BF0 6ES7677-1DD00-0BG0 6ES7677-1DD00-0BH0 6ES7677-1FD00-0FB0		.
	V2.9.1	Recommended for upgrading: Update V2.9.1 Description Please contact your local Siemens partner or our Customer Support to obtain this BIOS version. In conjunction with the BIOS update we furthermore recommend to check the version of the graphics driver. For more information please read entry ID 47380448	07/2009
	V2.8.0	For backup only: Update V2.8.0 Description Please contact your local Siemens partner or our Customer Support to obtain this BIOS version.	07/2009
	V2.7.0	For backup only: Update V2.7.0 Description Please contact your local Siemens partner or our Customer Support to obtain this BIOS version.	07/2009
	V2.6.0	For backup only: Update V2.6.0 Description Please contact your local Siemens partner or our Customer Support to obtain this BIOS version.	07/2009
	V2.5.0	For backup only: Update V2.5.0 Description Please contact your local Siemens partner or our Customer Support to obtain this BIOS version.	07/2009

Update V2.9.1

The following change has been implemented:

• Update of the Memory Reference Code

Update V2.8.0

The following changes have been implemented:

• PCI Optimization (necessary for WinAC 2010)
• Intel Microcode Update v54

Update V2.7.0

The following change has been implemented:

• Update DTS (Digital Thermal Sensor)

Update V2.6.0

The following change has been implemented:

• Update of the power management
  

Update V2.5.0

The following new functions are supported:

• Support of non-shared interrupts
• Optimization of the startup time