Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
Joerg Heinrich wrote:
> Hi NG,
>
> i have an K8N-E (Bios 1006).
>
> Is it good to enable ACPI 2 (in Bios)???
>
> I use WinXP Home.
>
> Thanks for Helping
> Joerg
Presuming this is the S3 ACPI mode then yes. ACPI comprises of various
states of the CPU such as being full speed, throttled back, standby (S3) &
hibernate (S5). A modern OS such as XP has fairly reliable Power Management
& is usually worth enabling IMO.
S3 mode should be completely silent, ie, fans off, disc drives powered down,
some PCI cards in standby, others off & the CPU in sleep mode with the RAM's
content still being refreshed. When an event such as moving the mouse,
pressing a key or possibly even pressing the scan button on a scanner will
wake the PC. I have my A7N8X-E to enter Standby mode automatically after
20mins.
The big problem is that once an OS such as XP has already been installed,
more often than not enabling S3 in the bios afterwards doesn't work - the
fans won't power off so becomes rather pointless. Sometimes, a MS utility
called dumppo.exe (do a Google search) can fix this but by no means always.
The sure-fire way to get S3 working correctly is to clean install XP onto a
newly formatted partition (a repair install won't usually work. Why Asus
don't enable this as the default is beyond my understanding.
Related to S3 standby mode are many m/b jumper settings that allow pairs of
USB ports &/or the PS/2 keyboard mouse to remain powered from the 5VSB
supply that remains on during S3, unlike the main 5V supply that gets
switched off as does the 12V supply. One way to ease a clean install of XP
is to run FAST (Files & Settings Transfer Wizard) before reinstalling then
rerunning it on the clean installation to recover many of the OS settings &
even a few 3rd party app's settings as well. The same can be done for MS
Office settings.
Regards
The specs for ACPI-2 aren't that 
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