Hence my psu being as old as it is and still going strong. So adding up all the wattage requirements of your pc components if you buy a psu that is higher than your requirements (eg if you have 500w of power draw a 1000w psu would be ideal) then the efficiency of your psu is greater and costs are reduced and heat is reduced meaning longer lifespan. A higher rated supply will be able to handle generated and ambiant heat better thus if you run your psu below the load in which it would require the fan to kick in to cool it you would be prolonging the life span of your supply. You could run a psu at 99% load (as to not blow it) it would function fine, your cost efficiency would be decent (it only really matters when you get down to brass tacks with high unit cost areas and you are trying to squeeze every penny) but the heat generated would be obscene. The main cause of component failure is heat and so the higher the load the more heat you generate. An 80+ white rated psu will be 80% efficient across the load range with an 80+ platinum coming in at around 95% at 50% load & 90% at 100% load. Please go to the relevant subreddits and support forums, for example: Build help and build shares posts go in their respective megathreads No referral / affiliate links, personal voting / campaigning / funding, or selling posts Welcome to /r/Plex, a subreddit dedicated to Plex, the media server/client solution for enjoying your media! Plex Community Discord Rules Latest Regular Threads: No Stupid Q&A: Tool Tuesday: Build Help: Share Your Build: Submit Troubleshooting Post Files not showing up correctly?
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