It's obvious I'm clueless about this stuff. I checked the PSUs on the link you provided and see the model numbers aren't anything close. So, if I understand correctly as long as it fits in the space and it's equal to or more wattage it doesn't matter if the numbers match? Is the ATX a designation that makes them work?
I'll definitely take your advice on the higher wattage. Thanks for taking the time.
I have an old HP A656X desktop that needs a new power supply. The current power supply is a bestec atx 250w 12Z Rev. D2. I'm trying to keep the cost as low as possible. I've seen power supplies that have that model # without the D2 part. Is that essential? It seems that I could get a new one for $18.00 free shipping without the D2 but with D2 it's a used model for the same price or about $25-30.00 new.