BIOS 45 has a change in the ACPI table which will cause a re-enumeration of onboard and add-in devices. Systems upgrading the system BIOS prior to BIOS 45 or later, will see a re-enumeration of onboard and add-in devices under the following operating systems: Microsoft* Windows* 2003 R2 SP2, Microsft* Windows 2008 SP2, Microsoft* Windows 2008 R2, VMWare* ESX* 3.5, VMWare ESXi* 3.5, VMWare 4.0, and VMWare ESXi 4.0.

	Technical Advisory 949 [PDF]
	File Name: TA0949_DEVICES RE-ENUMERATE AFTER BIOS UPDATE.pdf Size: 24,181 bytes Date: April 2010

This applies to:

Intel® Server Board S5500HCV Intel® Server Board S5500WB Intel® Server Board S5520HC Intel® Server Board S5520HCT Intel® Server Board S5520UR Intel® Server System SC5650BCDP Intel® Server System SC5650HCBRP Intel® Server System SR1600UR Intel® Server System SR1625UR Intel® Server System SR1690WB Intel® Server System SR2600UR Intel® Server System SR2612UR Intel® Server System SR2625UR Intel® Workstation Board S5520SC Intel® Workstation System SC5650SCWS