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I always just buy a psu that is in the middle zone of good enough and overkill. Just because I want the peace of mind for when my system is older, to take account for capacitor aging, as well other unexpected upgrades or something.

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hope you can help me out abit, im quite new to this Building thing and the PSU i have is just ok, my question is, is there a way for me to use my other PSU

its a sim and right now i aint clocking crasy but i need to know what i want of power do to be sure i dont get a shortege

atm im just running standard cooling and 3 x case fans

 

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I have always found - many will disagree - that a higher rated PSU will run cooler.

IE 850W supplying power for a 650W need.

With no overloads - much less power drain - PSU runs cooler.

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Sometimes cooler = quieter too depending on the unit  :)

 

And I agree with you, I'd much rather overkill and have my power supply only expecting to deliver 50-60% or it's rated capacity instead of 80-90% of it's rated capacity.  Plus there is the whole "future" proofing argument.  Honestly if you pick the right power supply now and get a great unit, it really can follow you through 2 or 3 new builds moving forward.

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