Dell OptiPlex 990 (Early 2011) - Manual (Page 63)

ME General Settings
The table below lists the default settings for the Intel Management Engine BIOS Extension (MEBx) on general settings page.
Password
Password admin
Change Intel ME Password
Change Intel ME Password blank
SET PRTC
Set PRTC blank
Power Control
Power Control
Intel ME ON in Host Sleep Mobile: ON is S0
Mobile: ON is S0, ME Wake in S3, S4-5 (AC only) *
Idle Time Out 1
*Default setting
**May cause Intel AMT partial unprovision
1 Intel ME Platform State Control is only changed for Management Engine (ME) troubleshooting.
2 Un-provision setting only seen if the box is provisioned.