Dell power supplies are made to fit Dells best, so it's easiest to replace like with like. But if you can get one nearly the same size and make it fit in the hole, you'll find the non-Dell ones are a lot quieter. My daughter did that last year on her computer up at college. She ordered one from NewEgg, after researching the Dell part. "It didn't quite fit so I cut the case," she told me. Good girl! Forcing it isn't the answer, but modifying the case is sometimes the best remedy.

SRS