I picked up an HPZ800 off Ebay last week. 2xX5670's, 48Gb Ram and 2x160Gb Drives.

Plugged it in, installed my goto Centos7. All good, got boinc installed and running. Next day it locked up. Could not get it to reboot into linux. Re-installed Centos & again, up and running. Next day locked up again.

So, I disabled the RAID, re-installed Centos7 again yesterday, got boinc up and running and left a 'top' window open. Well today, it locked up again and very bizarrely, it shows up for 1 day and 0min. Exactly 1 day..I suspect the others were too but don't know for sure. Temperatures weren't too bad

top - 10:32:50 up 1 day, 0 min, 3 users, load average: 24.82, 24.80, 24.84
Tasks: 416 total, 2 running, 414 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.0 sy, 99.9 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 s
KiB Mem: 49277756 total, 3696072 used, 45581684 free, 2728 buffers
KiB Swap: 24780796 total, 0 used, 24780796 free. 1571584 cached Mem

Going to install a different distro, but this is very odd. Any ideas??