What is the standard value of NoLPM?

Frozen Tweaks writes 0 when you switch the tweak off, which is the value it treats as the Windows standard. With the tweak on, NoLPM is 1.

Is "Disable AHCI Link Power Management" safe to switch on?

Worth it on a desktop with SATA drives. Skip it on battery. The main cost: Slightly higher idle power use, which matters on a laptop.

Is "Disable AHCI Link Power Management" free in Frozen Tweaks?

It is part of Frozen Pro and Elite. You can also make the change by hand with the values on this page.

Disable AHCI link power management (HIPM/DIPM) to stop SATA drive hitches

Frost LIVEPowerProUndo: YesUpdated Oct 8, 2026View as Markdown

Short answer

Updated Oct 8, 2026

Link power management lets a SATA drive and its controller put the cable link to sleep when idle. Waking it adds a delay to the next read. This tweak sets NoLPM, which keeps the link awake. In the registry it sets NoLPM to 1 under HKLM\SYSTEM\CurrentControlSet\Services\storahci\Parameters\Device.

In the app

Disable AHCI Link Power ManagementPRO

Registry

HKLMSYSTEM\CurrentControlSet\Services\storahci\Parameters\Device

NoLPM01

What the switch writes. Your current value may differ.

What it does

Link power management lets a SATA drive and its controller put the cable link to sleep when idle. Waking it adds a delay to the next read. This tweak sets NoLPM, which keeps the link awake.

In the app the switch is called "Disable AHCI Link Power Management", described there as: Prevents HIPM/DIPM sleep on SATA SSDs to avoid IO latency spikes.

When it helps, and when it hurts

When it helps

Short freezes when a game reads from a SATA SSD or hard disk that had gone idle.

When it hurts

Slightly higher idle power use, which matters on a laptop.
It does nothing for NVMe drives, which do not use SATA link power states.

What it writes

Exactly what the switch changes, read from the app's source. Switching it off is what the app writes when you turn the tweak off again.

Registry values the switch writes.
Key and value	With the tweak	Switching it off
HKLMSYSTEM\CurrentControlSet\Services\storahci\Parameters\DeviceNoLPM	1	0

From the app's source (storage_lpm_off.hpp), app 2.0.0, checked Oct 8, 2026.

The same change by hand

You do not need the app for this one. These commands make the changes from the table above. Run them in a Command Prompt opened as administrator, and make a restore point first.

Make the change · CMD

reg add "HKLM\SYSTEM\CurrentControlSet\Services\storahci\Parameters\Device" /v "NoLPM" /t REG_DWORD /d 1 /f

Put it back · CMD

reg add "HKLM\SYSTEM\CurrentControlSet\Services\storahci\Parameters\Device" /v "NoLPM" /t REG_DWORD /d 0 /f

See what it is set to now · CMD

reg query "HKLM\SYSTEM\CurrentControlSet\Services\storahci\Parameters\Device" /v "NoLPM"

How to undo it

In the app: Yes

Switching it off sets a standard Windows value, which may not be exactly how you had it.

Switch the tweak off in Frozen Tweaks. It writes NoLPM back to 0.

Changing several settings at once? The app's Make a restore point button, on every plan, makes a Windows restore point before you start.

Verdict

Worth it on a desktop with SATA drives. Skip it on battery.

Questions

What does the "Disable AHCI Link Power Management" tweak change in Windows?: In the registry it sets NoLPM to 1 under HKLM\SYSTEM\CurrentControlSet\Services\storahci\Parameters\Device.
What is the standard value of NoLPM?: Frozen Tweaks writes 0 when you switch the tweak off, which is the value it treats as the Windows standard. With the tweak on, NoLPM is 1.
Is "Disable AHCI Link Power Management" safe to switch on?: Worth it on a desktop with SATA drives. Skip it on battery. The main cost: Slightly higher idle power use, which matters on a laptop.
How do I undo it?: Switch the tweak off in Frozen Tweaks. Switching it off sets a standard Windows value, which may not be exactly how you had it.
Is "Disable AHCI Link Power Management" free in Frozen Tweaks?: It is part of Frozen Pro and Elite. You can also make the change by hand with the values on this page.

In the app