| Setting | Recommended State | Why it matters for UPS | | :--- | :--- | :--- | | | Enabled | Obviously. | | PCIe Device Power On | Enabled | Allows the NIC to trigger boot. | | Deep Sleep / ErP Ready | Disabled | CRITICAL. ErP (Energy-related Products) mode cuts +5VSB to the NIC to save 0.5W. This kills WoL after a UPS shutdown. | | AC Power Loss / Restore | Power On | THE MOST IMPORTANT SETTING. When the UPS restores power, the PC should turn on without needing a Magic Packet. | | S5 (Soft Off) State | OS Controlled | Ensures the NIC stays partially lit. |
Your NIC loses standby voltage. The Magic Packet evaporates into the void. You cannot wake the PC.
Download the "APC PowerChute Personal Edition" and the "WakeMeOnLan" (NirSoft) utility to test your Magic Packet delivery right now. apc ups wake on lan best
With the steps above, you can confidently shut down your home lab, fly across the country, and wake it remotely—safe in the knowledge that a power flicker won't leave you stranded in the dark.
Can't wake your server if the power glitched? Here is how to configure the "Holy Trinity" of remote access: APC UPS + Wake-on-LAN. | Setting | Recommended State | Why it
If you enable "AC Power Loss: Power On," you technically don't need WoL at all! When the APC UPS finishes recharging and re-energizes the outlets, the PC will boot as if you pressed the power button. This is the "Best" fail-safe for APC UPS users. Part 3: The Windows & NIC Driver Settings (The Hidden Kryptonite) Even with a perfect APC UPS and BIOS, Windows updates often kill WoL.
In this guide, we will uncover the to ensure your system wakes up—every single time. The Problem: Why Most Wake-on-LAN Setups Fail with UPS Before we dive into the "best" configuration, you need to understand a hardware reality: Standard Wake-on-LAN requires standby power. ErP (Energy-related Products) mode cuts +5VSB to the
Typically, a computer's Ethernet port stays alive via the +5VSB (Standby Voltage) rail from the power supply. When the UPS enters deep discharge or "sleep" mode (after a low-battery shutdown), it often cuts all outlet power to save the battery.