I had just upgraded from an AMD 6670 to a GTX 970 and loaded into a game of BF4 when my pc just turned off. Now when I try to turn it on, the fans and lights turn on for about half a second and then it all goes off again. When I reinstalled my old GPU it was all working again but as soon as my 970 is installed it refuses to turn on.
P.S. Im a bit of a noob as this is my first pc I have built.
Specs CPU: i5 3330 PSU: Corsair CX600m New GPU: MSI GTX 970 4gb Old GPU: AMD 6670 RAM: 8gb DDR3
Should be, but it might just be defective. Otherwise I can't think of much else that would make it randomly shut off,
If you can still return the 970, and you don't want to buy a new PSU if that turns out to be the issue you could always buy a 750ti, it's pretty power efficient for the performance.
Have you fully uninstalled the old drivers. With DDU to remove the registry entries too, even if the old drivers are gone there could be residual left overseas causing problems.