I was about to start overclocking but just looked at HW monitor to see it's showing this: I guess the temp is fine - i know some get confused so i'm not fussed about the apparent 127C (although if someone could shed some light that would be cool). But what I'm worried about is that my -5V is always around -2V... Is this just HW monitor playing up? I don't think my BIOS displays this info to check so are there other utilities you'd recommend? Or have I just missed something and this is normal? thanks!
your computer would shutdown or throttle down at such temperature. Most likelly a miss read of sensor. Try a different temperature program. I recommend (although not free, but there is a trial version), Aida64 (link to download page: http://www.aida64.com/downloads/aida64extreme230exe)
Definitely got to be a dodgy sensor and/or an incorrect reading. TMPIN2 seems to be the CPU temp and as GoodBytes states above no modern CPU would stay switched on at those temps. From other threads on here hardware monitoring of PSU voltages is shaky at best. My +12v reads as ~8v on HW monitor but the machine is fine.
everest works really good too for monitoring.. I like it cause it gives you a lot of information like detailed memory timing- temps and voltage are correct too.. all I use for monitoring really
I get a similar temp reading of ~130 degrees as you, its a faulty reading as other programs read it as normal!