Unstable system - what tools to test?

[craptakular]

I have built a spare computer for when I return to my parents to visit, However it seems to blue screen on world of tanks once every couple of days and I have had lockups and crash to desktops in Arma 2.

What tools can I use to test cpu, memory and gpu? I want to test them independantly to hopefully identify the culprit.

 

[craptakular]

Wazza how can I check volts?

CPu-z, GPU-z?

I haven't looked at all this jazz ina few years now.

 

[craptakular]

hehe think I may have found the potential problem, a few years back I must have overclocked the ram, I have turned the timings to the standard setting and selected the correct 1.65v for them.

I'll see how I go and report back!