ACPI Suspend type S1 or S3 , which one is better ?

♦ S1 (Sleep). The CPU is stopped; The RAM is regenerated; the system functions in reduced power.

♦ S3 (Standby) The CPU does not have any power; The RAM regenerates at minimum; the power supply unit is in mode of reduced power. This mode is also called “Save to RAM”.




When you quoted set the standby mode under window OS to S1 or S3" I think you were referring to changing the mode in the actual windows os. I think that you have to have S3 set up in your bios first so that windows can accomplish this. I have three settings in my bios S1/S3, S1 and S3. I am thinking that if I chose S1/S3 windows would actually use your os setting for S3 (or S1 if you changed it back). Many bios (that I have used) come with S1 as the default setting. I changed my bios to reflect S3 only. And make sure you let bios know you have an os that uses plug and play. Otherwise your bios sets up the devices in your system. This may impact on your using Windows to set up your S1 or S3 configuration.

At any rate I always change my bios to S3 and I have had no problems. I used to have a problem with my usb mouse kicking me out of standby but lately that hasn't been the case. I guess they fixed something.