Metro 2033 Crashes

[martinjack317]

Whenever I play metro 2033, the original not redux, I can play the game fine with no lag whatsoever but after about 5-7 minutes of playing the game just cuts to black and my screen tells me I have no signal and half of the time I have to just turn my PC off and the other half my PC resets. My computer is fairly powerful so I have no idea why it is doing this and any help is appreciated.

*UPDATE*
My PC is an Alienware X51 R2 with an Intel i5-4440 CPU @ 3.19Ghz (4 CPUs) ~3.1GHz.
My GPU is a Nvidia Geforce GTX 970 and I have 8GB of RAM.
My Power Supply is a Dell 330W external PSU.
The only information I can find to identify my Motherboard is that it is a 'Alienware Baseboard'.

 

[Carnaxus]

Define "fairly powerful" for us with a full PC spec, please. Make and model of your CPU, GPU, motherboard, RAM including amount and how it's split up (2x4GB, 8x2GB, etc), and power supply.