freeze - Ubuntu 16.04 seemingly random freezing on AMD system

Hello all

I've got an HTPC / file server set up at home.
Hardware specs:

• AMD A6


• Asus f2a85-m motherboard


• 4GB of corsair DDR3 ram

Software:

• Ubuntu 16.04



• kernel 4.7.2


• Kodi

Since the install of Ubuntu my system randomly freezes.
No input responce , no HDD activity, nothing.
A hard reset is needed.

What I've doen so far:

• reinstall ubuntu


• Switched hard drives (SSD or HDD makes no difference)


• Ran Memtest for a full pass-> no errors


• tailed logs: syslog, kern, kodi log -> nothing to be seen.

I'm out of ideas so far. I can not resproduce the freezes in any way. They seem completely random. (they sometimes occur after 5 hours, or after 1 min after boot)
The only thing I can see is that tke last log line befor crash seems to be:

Oct  9 21:00:02 Bonox-Media dhclient[982]: DHCPACK of 192.168.0.184 from 192.168.0.1
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1085]   address 192.168.0.184
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1088]   plen 24 (255.255.255.0)
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1092]   gateway 192.168.0.1
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   server identifier 192.168.0.1
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   lease time 3600
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   hostname 'Bonox-Media'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   nameserver '195.130.131.2'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   nameserver '195.130.130.2'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   domain name 'home'

Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1094] dhcp4 (enp3s0): state changed bound -> b                                                                                                                          ound
Oct  9 21:00:02 Bonox-Media dbus[681]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher                                                                                                                          ' unit='dbus-org.freedesktop.nm-dispatcher.service'
Oct  9 21:00:02 Bonox-Media dhclient[982]: bound to 192.168.0.184 -- renewal in 1648 seconds.
Oct  9 21:00:02 Bonox-Media systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct  9 21:00:02 Bonox-Media dbus[681]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Oct  9 21:00:02 Bonox-Media systemd[1]: Started Network Manager Script Dispatcher Service.
Oct  9 21:00:02 Bonox-Media nm-dispatcher: req:1 'dhcp4-change' [enp3s0]: new request (1 scripts)
Oct  9 21:00:02 Bonox-Media nm-dispatcher: req:1 'dhcp4-change' [enp3s0]: start running ordered scripts...

Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5697]   server identifier 192.168.0.1

Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5698]   lease time 3600
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5698]   hostname 'Bonox-Media'
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5699]   nameserver '195.130.131.2'
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5699]   nameserver '195.130.130.2'
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5699]   domain name 'home'
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5699] dhcp4 (enp3s0): state changed unknown -> bound
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5731] policy: set 'Wired connection 1' (enp3s0) as default for IPv4 routing and DNS
Oct  9 20:35:48 Bonox-Media NetworkManager[706]:   [1476038148.5735] dns-mgr: Writing DNS information to /sbin/resolvconf
Oct  9 20:35:50 Bonox-Media NetworkManager[706]:   [1476038150.2423] manager: startup complete
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1085]   address 192.168.0.184

Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1088]   plen 24 (255.255.255.0)
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1092]   gateway 192.168.0.1
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   server identifier 192.168.0.1
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   lease time 3600
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   hostname 'Bonox-Media'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   nameserver '195.130.131.2'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   nameserver '195.130.130.2'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1093]   domain name 'home'
Oct  9 21:00:02 Bonox-Media NetworkManager[706]:   [1476039602.1094] dhcp4 (enp3s0): state changed bound -> bound

I can not really see if this is the last thing happening for the crash. But is is the last line and has been for a multiple of occurences.

Any ideas to further narrow the problem would be grately appreciated.

Thank you!

EDIT: To clarify: I had the same issue before upgrading to kernel 4.7.2.
EDIT UPDATE:

After one month of further searching for a solution, I've not found one.
Logs continue to reveal nothing.

I'm pretty much convinced it is a hardware issue since I've tried Mint and the issue persists.