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[VEXICUS]

4 hours ago, seagate_surfer said:

It is a bit unnecessary but the efficiency peak of the PSUs is usually found when they work in the middle of their capacity. That is, if you need 650w but you get enough funds to buy a 1200w PSU then the performance of the PSU will be better than it reaches amounts of power close to its limits, again this something that not anyone would care but this is the reason why when you see the lights flickering a bit on almost anything, utility poles, etc... Because the power fluctuates but it is handled better when the power supply is not demanded to work at a %100, below some images for reference: 

 

This is a common myth that PSUs are most efficient at 50% load. There are PSUs that have peak efficiency at 30-40% load.

 

@Spotty can help you more with this.

[seagate_surfer]

Well, this is not so important, don't pay too much attention to this. The power supply basically converts the current that comes from our power outlet in our homes to a specific format that is what our PC needs to use, basically it is a continuous voltage that never changes direction and in fact it has to be as flat as possible because we need constant power in the components of our pc because as you know, variations of voltage within the components of the pc can cause malfunctions and that's why I said above that the current that arrives at us to our homes fluctuates so the main task of our power supply is to transform this current, flatten as much as possible those ripples so that the signal is as flat as possible and as continuous as possible so that our components have a constant feed without any fluctuation or at least with the minimum possible fluctuation. It is not that it is a myth necessarily, simply what this phrase means is that you try to avoid any power supply of an unknown brand exorbitantly cheap because it can, therefore, damage your pc. What I mean by all this is that it is not necessary to spend a million dollars on the power supply, nor that you need to buy a super high-end power supply because they will work the same, this data is only for technology lovers, enthusiasts who want to do a super-duper overclocking "unnecessarily" as a weekend experiment, people looking to make overclocking as perfect as possible, as fine as possible, if someone really want to do this we need a power source that has the least possible fluctuation and with a source that has the minimum possible fluctuation we would definitely get a better result in overclocking. But the real difference in PSUs is the durability and another sign to know if a power supply is good is the guarantee in years that they give you, a guarantee of five years promises that during the next five years that source will not fail you and if it fails you it is a factory problem, the more years of guarantee the more quality.