MSI interrupt mode for the video card

OptionalNeeds administrator rightsReboot needed

The video card signals the processor with a message (MSI) instead of a shared interrupt line. Turned on only if the video card's driver itself declares MSI support.

Expected effect

Can slightly reduce latency and micro-stutters if the video card shares an interrupt line with other devices. Modern drivers often turn MSI on themselves — then NyxBoost shows it is already so.

Possible side effects

In rare cases HDMI audio disappears or artifacts appear after a restart: undo it and restart. NyxBoost offers a restore point before the change.

What exactly changes

Registry key	Value	Type	New value
`HKLM\SYSTEM\CurrentControlSet\Enum\PCI\VEN_10DE&DEV_2C02&SUBSYS_53101462&REV_A1\CAB96016142DB04800\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties`	`MSISupported`	DWord	`1`
`HKLM\SYSTEM\CurrentControlSet\Enum\PCI\VEN_1002&DEV_13C0&SUBSYS_7E571462&REV_C2\4&3055F162&0&0041\Device Parameters\Interrupt Management\MessageSignaledInterruptProperties`	`MSISupported`	DWord	`1`

How to undo it

Before a change NyxBoost saves the previous values; "Revert" brings them back and removes those that did not exist before.

In NyxBoost: Recovery → “Revert” next to this setting's entry.
Without the program: open the Registry Editor (regedit), go to the key from the table and put back the previous value — NyxBoost records it in its change history.

How NyxBoost checks the result

After applying, NyxBoost reads the values again and compares them with the expected ones. To see the real effect on your PC, use FPS Lab: it measures the same game before and after.

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