System regularly hangs?

[jefe9]

I have just completed a first self-build.

Used an existing mid-tower case, replaced old motherboard and CPU with microATX ASUS and intel i3 processor. Installed Ubuntu ... and it all works .. for hours (sometimes )

BUT ... it frequently and regularly hangs, for no discernible reason. ( I been a C++ programmer for 20 years so i know my way around the software side of things )

I suspect that the CPU or motherboard may be overheating ( but the reported temperatures in BIOS are circa 25 degrees C, and 29 degrees C respectively. which must surely be ok.

Is there any further way to diagnose temperatures (other than BIOS at bootup )? How can i tell if temperature sensors are faulty?

This repeated freezing / hanging of the system happens often, maybe 10 times in a day; other times I get a clear hour on system running with no problems.

Any advice appreciated.

Thanks

Jefe

 

[Hood]

Try Lm-sensors. Once you have temps on display, run a stress test such as stresslinux, you'll quickly know if it's a temp problem. Also could be a bad RAM module; had one of those a while back causing random reboots on a brand new Intel i5-2500K system I built for my cousin. Found it by booting system with one stick at a time; ran perfect on the good one, wouldn't boot with just the bad one, so it was an easy diagnosis. Also, if you are using the old power supply, I'd replace it with a good brand like Seasonic or Corsair, an old OEM power supply is usually junk to start with and gets worse with age.