What does the "Disable PCIe ASPM" tweak change in Windows?

It runs powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0 and 2 more commands. The full list is in the table on this page, read from the app's source.

Is "Disable PCIe ASPM" safe to switch on?

Off is the right setting for a gaming desktop. On a laptop, use it plugged in. The main cost: Higher idle power use and more heat, which matters most on laptops.

Is "Disable PCIe ASPM" 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.

PCI Express Link State Power Management: off or on for gaming?

Frost LIVEPowerProUndo: YesUpdated Oct 8, 2026View as Markdown

Short answer

Updated Oct 8, 2026

Link State Power Management (ASPM) lets PCIe devices such as the graphics card and NVMe drives put their link into a low power state when idle. Leaving that state takes a moment. This tweak sets it to Off in the active power plan. It runs powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0 and 2 more commands.

In the app

Disable PCIe ASPMPRO

Command

powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 1powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0

What the switch writes. Your current value may differ. 2 more changes below.

What it does

In the app the switch is called "Disable PCIe ASPM", described there as: Sets Link State Power Management=Off to avoid PCIe L1/L1.2 latency spikes.

When it helps, and when it hurts

When it helps

Brief stutters when the graphics card or an NVMe drive wakes its link under changing load.

When it hurts

Higher idle power use and more heat, which matters most on laptops.
The High performance plan already sets this to Off, so there may be nothing to change.

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.

With the tweak · CMD

powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0
powercfg -setdcvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0
powercfg -S SCHEME_CURRENT

Switching it off · CMD

powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 1
powercfg -setdcvalueindex SCHEME_CURRENT SUB_PCIE ASPM 1
powercfg -S SCHEME_CURRENT

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

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 runs the commands shown under "Switching it off".

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

Off is the right setting for a gaming desktop. On a laptop, use it plugged in.

Questions

What does the "Disable PCIe ASPM" tweak change in Windows?: It runs powercfg -setacvalueindex SCHEME_CURRENT SUB_PCIE ASPM 0 and 2 more commands. The full list is in the table on this page, read from the app's source.
Is "Disable PCIe ASPM" safe to switch on?: Off is the right setting for a gaming desktop. On a laptop, use it plugged in. The main cost: Higher idle power use and more heat, which matters most on laptops.
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 PCIe ASPM" 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