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Energy saver, should I replace my PSU?

4u90cm
  • 73 months ago

So I've compiled this shopping list: http://de.pcpartpicker.com/user/4u90cm/saved/488n

The idea is to build an energy saving system into my ATX midi tower (space or beauty is not of the essence, money is).

I have an Enermax 550W PSU powering my current setup, which is of course ridiculously much for my new build with its estimated 126W maximum.

My question is, should I get a lower power PSU to save more energy, or will the difference be small/negligible? I read somewhere that an energy saving build needs an appropriate PSU because highpowered PSUs aren't really energy efficient in their lower wattage range or something to that effect.

If so, is e.g. the Pico PSU a good replacement? Can I even use it in my ATX midi tower (heard the Pico's cables are very short)?

Comments

  • 73 months ago
  • 1 point

"build needs an appropriate PSU because highpowered PSUs aren't really energy efficient in their lower wattage range or something to that effect."

As a rule of thumb PSUs peak in their efficiency at 50% load. 80+ certified PSUs will still be 80% or more efficient at 20%, 50% and 100% load.

[comment deleted]
  • 73 months ago
  • 1 point

Thanks for your replies!

My Enermax MODU 82+ is 80 Plus Bronze certified, so I don't think I'd shell out more than a hundred bucks for a SeaSonic which still has massive unnecessary overhead. On the other hand, my new setup at maximum load would be utilizing around 20% of either of these PSUs, running below 20% most of the time.

[comment deleted]
  • 73 months ago
  • 1 point

Yeah, I was getting that impression from googling off my fingertips in search of PSUs specifically made for low power usage.

Thanks again, I'll stick with my Enermax then.

[comment deleted]

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