There is a case fan, as well as obviously the fan on the PSU, heatsink
& gfx card. I downloaded a program to monitor the temperatures a while
ago. I could only watch two temperature readings, one rose gradually
depending on how much heavy the processor was worked, but the other one
fluctuated greatly. The reading would jump up and down a good 10
degrees every five or ten seconds, I don't know whether or not this is
significant.

I will monitor them again in the BIOS and take note of the temperatures
and voltage fluctuations.

Thank you for the responses so far, what would you recommend?