Graphics Card Issue

[welding11]

Hi everyone, here is the situation I have upgraded my card from a gtx 460 to a Asus Nvidia GeForce 2GB GTX 670 DirectCU II Graphics Card. I can play games for a few hours if that and then either the game will lock up and I have to kill the process or my computer will lock up.

I thought it was an issue with the card so I have already took the step to return it and replace it. However just before I did I thought I would try it on my brothers computer and it seems to run everything fine. So I put my old card back in just to make sure and with this in everything is fine.

I will be getting the exact same card as a replacement so I thought I would make sure of a couple of things anyway.

As far as I am aware PCI express 3.0 cards are backwards compatible, is this correct?? Finally as I am not 100% sure on what power supply is efficient and I read around a bit and it seemed mine would be plenty for one card is my PSU powerful enough. Spec Below:

i5 2500k
asus p8z68-v
4gb memory(cant remeber make)
antec truepower 650w <- this is what I am concerned about if anything

Thanks

 

[RJC]

Your PSU is ample for your system and gpu, but it does not rule out if it's at fault though.

Can you test your system with another PSU?

 

[welding11]

I totally understand that. I should be able to get hold of a power supply. My pc was upgraded this year with all the parts above and has been running fine and it is used everyday which is why I assumed GPU issue.