Windows 7: AHCI Link Power Management - Enable HIPM and DIPM

Shawn, this is very interesting tip of yours.

After install the Add_AHCI_Link_Power_Management_Option.reg file, it appears my default state is HIPM in the Advanced Power Settings management both battery & wired powered because looks i'm on a Intel RST limited system configuration that will not allow me to directly link HIPM + DIPM together.

Therefore in the default registry key "iaStor", DIPM & LPM are already set to 1= Enabled for my computer. LPMSTATE is also set in iaStor Key to 0= Partial.

That's mean i'm on "Partial" state and not "Slumber".
"Partial" transistion looks the most common state for best performances when Idle for HDD/SSD & Optical drives.

It is not clear for me if my system will turn automatic from "Slumber" transition (HIPM + DIPM) to "Partial" transition (HIPM).

[correcting]:It is not fully supported till after the S-ATA AHCI ICH9M Intel's chipset. (actually mine).

I do not know if i do force both state HIPM+DIPM for a long idle period, if it will be very efficient and will return it to Partial enough fast.

Otherwise most more recent Intel's chipset should do it.

So, set on "Active" should not slow down activities on the Hard Drive & Optical Drive consumption....during idle

Might read at closer look the link from Intel...

Thanks i'm studying it!!!

dear brink, hello again...

So... i use ssd and hdd. I put the hdd on a drive caddy replacing my DVDbay. the drive caddy was SATA-SATA caddy.
However, when i check my SSD toolbox, the controller showed as 2 IDE and 1 SATA. below is the pic



1) How do I check whether my HDD on the DVDBay using SATA connection or not? and how to check whether my HDD supports DIPM or not?
AHCI has been enabled from BIOS.

2) What happened if my HDD is actually using IDE Connection and not supporting DIPM?


thank you very much,

KP

Hello KP,

Please fill out your system specs so we will know what you have to better help.

System Info - See Your System Specs

Q1) Check your motherboard to see if the drive is connected to a SATA or IDE port

Q2) Then it just will not work for that drive, and will for any that do support it.

Done filling out the system specs.

I've turned on the DIPM on from my Intel SSD toolbox System Tuner, and my laptop still works just fine. That Screenshot was from Intel Toolbox as well though. So.... how do i know whether the DIPM works or not? Does it show an error or signs when it doesnt work?

I know how to replace DVDbay and put HDD caddy in on a notebook, I'm not, however, good enough to take apart the laptop to see whether the HDD caddy drive is connected to SATA or IDE port

it's a SATA-SATA caddy according to the seller (it has no packaging, just the caddy), so im not sure.
here's the SS i got from a website .

I don't know whether my HDD drive support DIPM or not, it's model is Seagate Momentus 750 gib

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if the SS of the caddy connection is too small i'll post the original size image later on, but it's too big i guess

Your laptop uses SATA connections, so you're good to go to set this how you like.