Random freezes and lockups

sorcerer

Active Member
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Location
Preston, Lancs, UK
Got an HP tower in with random lockups and freezes. HDD testing alright with both GSmartControl and HDTune, RAM testing alright with Memtest86+ v5.01. Inside is clean and free from dust with cooling working and temperatures normal.

I've had it on the bench for two days now and just cannot replicate the problem - it's not locked on me once.

I'm now thinking possibly the PSU but given that it's not locked up on me yet, just swapping out for a known good PSU isn't going to work. Are there any programs (preferrably free) that can monitor and log to a graph over at least 24 hours the voltages on the 3.3, 5 and 12V rails?
 
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