Computer shuts off randomly- is my psu faulty?

My computer has been randomly shutting off, and I'm totally at a loss as to why. At first I thought it might be the temperature, but it's been shutting off when the temperature is around 107-110F degrees, which is far below the maximum. I opened up the computer and cleaned out the dust anyways. I've downloaded the latest drivers for me graphics card, so I don't think that's it either. (Geforce gtx 750 ti) I also did a virus scan with Malwarebytes and nothing came up. 

I read somewhere that it could be my psu is failing, but I'm not really familiar with what all of these voltage numbers mean, and whether these are good or not. I took a screenshot of CPUID HWmonitor- can someone tell me if these numbers are good or bad? I'm currently using a Corsair CX500. I upgraded my graphics card and psu about a year ago, so I would be kind of surprised if my psu is already falling apart, but I don't know so that's why I'm asking here. 

Thanks!