Xfinity XB3 Hardware Mod: Disable WiFi, Save 2 Watts
2025-03-30
A user modded their Xfinity XB3 modem to save power. The XB3, provided with Comcast's cheaper Xfinity NOW service, consumes 14.9 watts. By disassembling the modem and grounding the EN pin on the TPS54328 voltage regulator, the user disabled WiFi, reducing power consumption to 12.5 watts – a 2-watt saving. While the admin page is briefly inaccessible after booting, network functionality remains unaffected.