Swap PSU fan out with a quiet one or no?

[archcycle]

I have an Ultra LSP550 550w PSU with a bottom mounted 135mm fan and a rubber gasket at the mounts. I'd like to mod it with a quiet fan but have some concerns about whether a silent fan would provide enough cooling. There's plenty of space in my full ATX to run a duct to the front of the case if fresh air is needed.

It's powering a pair of quad core xeon 2.5ghz with 16gb of memory and a radeon hd 6870 so there is going to be draw on it.

Or is this something that's not generally done and one is better off just buying a purpose built quiet PSU? I don't want to replace the whole PSU if not necessary.

[Lsv]

I have an Ultra LSP550 550w PSU with a bottom mounted 135mm fan and a rubber gasket at the mounts. I'd like to mod it with a quiet fan but have some concerns about whether a silent fan would provide enough cooling. There's plenty of space in my full ATX to run a duct to the front of the case if fresh air is needed.

It's powering a pair of quad core xeon 2.5ghz with 16gb of memory and a radeon hd 6870 so there is going to be draw on it.

Or is this something that's not generally done and one is better off just buying a purpose built quiet PSU? I don't want to replace the whole PSU if not necessary.

I wouldn't invest any more money into an Ultra PSU, they're made by Andyson and this one has 30A on the +12b, which puts it at 360~w on the +12v. No thx

If you have the cash pick up good quality PSU.