Could it be a PSU issue?

560ti draws 20 more watts than the 250. Also PSU's power capacity diminishes over time, especially for a low quality PSU. So I think you might be correct.

Having build all my own PCs for the past 15 years, I can say the number one culprit that causes system issues is the PSU. Thats why I don't buy cheap PSUs anymore.

I suggest you look for a better quality PSU. single 12V rail with 80bronze rating for better consistency.

you would be able to desire to appear at potential intake as an entire. What does your processor require, what number no longer uncomplicated drives do you have, what number disk drives, sound card, peripherals, cooling, lights? all of them use potential out of your PSU. it fairly is a reasonably beefy video card. and you're no longer giving it sufficient potential with that very small PSU. you would be able to desire to get a much better PSU a minimum of 600 watts. you are able to by no skill have too lots potential. maximum PSU's are self regulating. in the experience that your video card is pci-e make confident your new PSU is in simple terms too. And get a solid PSU with dissimilar 12v rails to allow for extra valuable potential distribution and for working video playing cards in SLI. you attempt to potential a video card it is rated at 350 watts and that's what the producer recommends you employ. it might artwork for particularly with a small psu yet you will finally end up burning up your potential furnish, or unfavourable yet another area of your laptop that's no longer getting sufficient potential.

yeah sounds like the PSU. cheap components will diminish quickly.

PSU but please remember Quality is it all my 500W Coolermaster pro can run a GTX580 no prob so get a good ONE!