Hi,

So I'm away from my computer at the moment, but I have a alienware x51 R2. I believe it came with a gtx 760 4gb gpu and the default psu I believe was a 330 watt power supply, which I'm confused about since I thought the minimum requirement was a 500 watt psu?

Anyways after about 6 months or so I've noticed that sometimes my games just shut off while playing, not the computer but the game itself. I've noticed this while playing gta 5 and fallout 4. Sometimes when I try to launch fallout 4 and won't even launch and attempt to do so then stop. This seems to be random, sometimes I can play for 2 minutes up to several hours before it shuts off. I've also had it happen a couple of times were computer restarts completely (this only happens rarely). I'm playing my games from Steam. I'm wondering what is causing this. fallout 4 runs pretty slow on my computer. I have a i7 version of the r2. I have 16 gb ram.

I was wanting to upgrade my gpu anyways, but am not sure if this is the cause of the issue. I ask what gpu would you recommend upgrading to, and if I need to power a new power supply to 500 watts. Is there a list of compatible gpu or psu for this machine? I don't want to buy something that won't work. I have a *** in EE, but have very limited knowledge of computer engineering. I'm also running my computer on a SSD.

Thanks for any help or suggestions. I would like to try and figure out why games completely shut off while playing, and why my computer restarts sometimes. I've gotten a message a couple of times saying that graphics. Sometimes I get the "

"Display driver stopped responding and has recovered" for windows 8 error message pop up while playing games

I'm running windows 10. Thanks for any help or suggestions on what i can to do to upgrade gpu and what might be causing me this problem.

Thanks for any help