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New PSU vs. Old PSU - Are they different sizes?

New PSU vs. Old PSU - Are they different sizes?

I want to get a new PSU soon, and I want to get this one. Problem is that I'm not sure if it will fit in my PC.
My PC is a HP a6500f and it comes with a stock 250W PSU. From l it said that its an ATX PSU (I think).

Asked by: Guest | Views: 154
Total answers/comments: 1
Guest [Entry]

"There is a surprising amount of variability in PSU sizes in my experience, even for the ""standard"" PSU formats. So be careful, measure, and look at the HxWxD measurements for the model you plan to buy!

ATX: 6x3.5x5.5"", HxWxD. Most common. Uses 4 mounting screws.
Mini-ATX: 5x3.5x5"", HxWxD. Rare size. Uses 4 mounting screws. Can be used in a regular ATX case, but often not the other way around.
MicroATX: 5x3x4"", HxWxD. Use 3 mounting screws. Not interchangeable with ATX or miniATX.
Flex ATX: Even smaller than Micro ATX. Various sizes according to case specs; often not interchangeable."