Pci Ven8086 Ampdev8c22 Ampsubsys309f17aa Amprev04 Patched -

The hardware ID PCI\VEN_8086&DEV_8C22&SUBSYS_309F17AA&REV_04 identifies the Intel 8 Series/C220 Series SMBus Controller

Often, when clean-installing Windows on Intel platforms, the SMBus controller yields a yellow exclamation mark in the Device Manager. pci ven8086 ampdev8c22 ampsubsys309f17aa amprev04 patched

2. The Code (INF Structure):

You might see:

4.2 Risks (Especially with Unofficial Patches)

• Increased Power Draw: Disabling ALPM or DEVSLP can add 0.5W - 1.5W to system idle power, reducing battery life by approximately 30-60 minutes on a Haswell laptop.
• Voided Support: Applying a non-vendor patch (e.g., a custom ACPI DSDT override) can brick the SATA controller’s non-volatile memory if done incorrectly, requiring a CMOS reset or worse, an SPI flash reprogramming.
• Incomplete Fix: Some community patches only mask the symptom. For example, patching the driver to ignore the REV_04 status might cause silent data corruption if the hardware has an actual DMA (Direct Memory Access) bug.

This hardware ID corresponds to the Intel(R) 8 Series/C220 Series SMBus Controller - 8C22 Increased Power Draw : Disabling ALPM or DEVSLP can add 0

00:1f.2 SATA controller [0106]: Intel Corporation 8 Series/C220 Series SATA AHCI Controller [8086:8c22] (rev 04)
        Subsystem: Lenovo Device [17aa:309f]
        Kernel driver in use: ahci
        Kernel modules: ahci