Intel D810E2CA3 Specification page 42

Intel Desktop Board D810E2CA3 Technical Product Specification
1.13.2.7 Wake from PS/2 Keyboard
PS/2 keyboard activity wakes the computer from an ACPI S1 or S3 state.
1.13.2.8 PME# Wakeup Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1 or
S3 state.
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