Pentium 4, 5 volt rail indicates low Tags: CPUs Pentium HD Last response: February 3, 2013 3:51 PM in CPUs Share rgieitz February 3, 2013 2:10:03 PM Intel Pentium 4 mothrbard diagnostics indicate 5 volt rail is 2.86 volts. Digital volt meter on HD connector indicates correct 4.96 volts. MB CPU overheats and shuts down. At a loss on this. //RICH SENDS More about : pentium volt rail low twelve25 a b à CPUs February 3, 2013 3:51:39 PM It's a P4. Likely that the power supply is ancient as well and failing or that the MB is no longer passing power through properly. This stuff happens after 7+ years. Can't find your answer ? Ask ! Publish Related resources: Forum10.30v on +12 volt rail Forum12 volt rail seems weak? ForumHelp With A Low 3.3 Volt Rail ForumPSU w/ 18A on 12V rail for GTX 650? ForumLow 12 volt rail ForumAsus Probe Giving Alerts on 5 Volt Rail ForumStupid question about 12 volt rails. ForumPSU no - 5 volt rail , question ForumLow voltage on 12v rail ForumRadeon HD 5770 on 25 amp. on 12 volt rail ? Forumi have 2 ,12 volt rails do the amps combine or can i combine them? Forum+12 Volt Amp Rail Confusion Forum+12 Volt Rail Amp Rating ForumSingle rail dual rail question? Forumantec 550w w/ LOW + 5 v rail ForumFX-6200 vs FX-6300? More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !