# Fixing System Clocks (SSDT-AWAC/RTC0) | Getting Started With ACPI

# # Fixing System Clocks (SSDT-AWAC/RTC0)

- What this SSDT does
- Methods to make this SSDT

## # What this SSDT does

The purpose of SSDT-AWAC/RTC0 is to fix the system clocks found on newer hardware, mainly found in the following:

- B360
- B365
- H310
- H370
- Z370 (Gigabyte and AsRock boards with newer BIOS versions)
- Z390
- B460
- Z490
- 400 series (Comet Lake, including Z490)
- 495 series (Icelake)
- X99
- X299

SSDT-AWAC tries to re-enable the old RTC clock that is compatible with macOS, while SSDT-RTC0 will instead create a "fake" RTC clock if there is no legacy one to enable.

## # Methods to make this SSDT

For the RTC fix, there are 3 methods you can choose from:

- Prebuilt
- SSDTTime
  - Does not support HEDT
- Manual
  - For most users
- Manual-HEDT
  - For X99 and X299 users