C'mon.. can you honestly state that a Dell psu actually outputs the 250W that it is rated for??? It is very well known that OEM's use the very least output quality on their psu's. Do not attempt to prove otherwise. Dell states 250w but that is most likely a 70% psu, which means your looking at about 175w actual output. Regardless of warranty (and not the pc but the GPU) your still running a risk. If your new 1050ti pukes you know that the OEM will ask for specs, and if you tell them you were running it on a 250w Dell psu... kiss that RMA goodbye.