Intermittent system lock ups

[wilsonian]

Hello,

I have an issue with one of my systems. It intermittently lockups up and requires a system reload. It's done this for over 2 years now and I'm finally tired of it doing so. The specs are as follows:

AMD Phenom II X6 1055T
M4A89GTD PRO/USB3
4x 2GB Dominator DDR3 Memory
Asus R7260X-DC2OC-2GD5
IBM Deskstar 1TB

I've carried out the following tests:

Passes
24 hour memtest 86 tests on each stick of RAM plus another 24 hours with all sticks at once.
24 hour Prime95 Small FTTS tests

Fails
Prime95 Blend tests - this either just drops out or the system hangs.

With the Prime95 Blends failing it points more to the CPU but are there any logs I can check that could indicate the cause of the crash?

[wilsonian]

I'd like to add the following:

Windows 10 has been installed for around year
The system was overclocked by Scan Computers when I purchased it but has since dialed it back to stock speeds
The BIOS is version 3029

[wilsonian]

After reading up on a few sites as to what to check HTG recommended the windows reliatibity function - unfortunately it only shows that windows did not shut down correctly.

It's really getting on my nerves as I don't have any other spare AMD AM3 systems to swap parts around and as it's old gear would like to keep costs down as much as possible.

Is there anything else I could check for these system lock ups?