Nvidia 400 - Manual (Page 31)

Installation
Page 3-15
3-8 ACPI S3 (Suspend To RAM) Function
This mainboard supports the STR (Suspend To RAM) power management
scheme by maintaining the appropriate power states in the DDR SDRAM
interface signals. The power source to the DDR SDRAM is kept active during
STR (ACPI S3). Advanced Configuration Power Interface (ACPI) provides many
Energy Saving Features for operating systems that support Instant ON and
QuickStart
TM function.
1. To enable STR functionality to save system power :
a. Install ACPI certified add-on cards (such as AGP, LAN, and modem cards).
b. In BIOS, under Power Management Setup (refer to Section 4), select “ACPI
Suspend Type: S3(STR)”.
c. When in Windows, open the Control Panel Power Management application,
and click the Advanced tab. In the Power buttons section, select “Stand By”
from the drop-down lists.
2. To activate the STR function:
a. Click the START button and choose Shut Down.
b. In the Shut Down Windows dialog box, select the Stand By option to enter
STR mode.
    
The following are the differences between STR power saving mode and Sus-
pend (Power On Suspend) mode:
a. STR is the most advanced Power Management mode.
b. STR cuts all the power supplied to peripherals except to memory - max. power
saving.
c. STR saves and keeps all on-screen data including any executed applications
to DDR SDRAM.
d. In STR mode, you must push the power button (connected to the onboard PW-
On of CFP pin) to wake up your system to the last display.