Computer shuts down when playing Skyrim

[Surgewolf]

Hi! So I've been having this problem recently where when ever I play Skyrim, my computer would shut down after about 45 minutes of playing. My computer would shut down as if i unplugged the power, just an INSTANT shut off. I've been playing Skyrim on my computer for about 2 years now and never had a problem. Also, I normally run the game at 45-60 fps at low/medium graphics (if that is of any help to whom would answer this question).

Here are my computer specs:
OS: Windows 7 Home Premium 64-bit
Model: p7-1234
Processor : AMD A6-3650 APU with Radeon(tm) HD Graphics (4CPUs), ~2.6GHz
Memory: 8192MB RAM
Graphics Card: NVIDIA GeForce GTX 550 Ti

Thanks for the help! And just let me know if need any more info about my computer specs.

 

[Dom_79]

Does your PC do this in any other circumstances?

A complete shutdown (like you pulled the plug) while doing something demanding (like running a game) can often point to an overheating or PSU issue. Monitor your CPU and GPU temps while gaming to prove/eliminate the temps as a possibility.

Also what is your make and model of PSU?

 

[Surgewolf]

Does your PC do this in any other circumstances?

A complete shutdown (like you pulled the plug) while doing something demanding (like running a game) can often point to an overheating or PSU issue. Monitor your CPU and GPU temps while gaming to prove/eliminate the temps as a possibility.

Also what is your make and model of PSU?

No my computer does not do this in any other circumstances, I also downloaded a program to moniter my temps and they seem to be fine, (never going over the max temp)
Also I'm not 100% sure how to check the make and model of my PSU, if you could tell me how that would be great, also thanks for the help. c: