If you installed Windows XP before enabling suspend to ram in your BIOS, your computer may be limited to the S1 system power state, instead of the deeper S3 system power state.

To resolve this problem:

1. Download the undocumented Microsoft dumppo.exe utility and save it in a folder that is in your PATH.

2. Open a CMD.EXE window.

3. To determine your Min sleep state and Max sleep state, type dumppo.exe admin and press Enter. You will receive a display similar to:

Admin policy overrides                              Min sleep state......: S1                              Max sleep state......: S4 - hibernate                              Min video timeout....: 0                              Max video timeout....: -1                              Min spindown timeout.: 0                              Max spindown timeout.: -1
4. To set the Min sleep state to S3 and the Max sleep state to S4, type dumppo.exe admin minsleep=s3 maxsleep=s4 and press Enter.

NOTE: Dumppo.exe configures the PolicyOverrides Value Name, a REG_BINARY data type, at HKEY_LOCAL_MACHINE\system\currentcontrolset\control\session manager\power.
After typing dumppo.exe admin minsleep=s3 maxsleep=s4, my PolicyOverrides contained 040000000500000000000000FFFFFFFF00000000FFFFFFFF.

NOTE: See tip 8351 » How can I enable the S3 system power state for standby when USB devices are armed for wake?

NOTE: See tip 8313 » ENERGY STAR's free EZ GPO tool allows a network administrator to centrally control power management settings using GPOs.

NOTE: See tip 8369 » POWERCFG.EXE is a command-line tool that allows an administrator to control the power settings of a Windows XP SP2 system.

NOTE: See tip 10679 » How can I use Powercfg.exe to create a Group Policy object for power schemes in Windows XP?