The PC power supply is the component that will be supplying power to the rest of the computer parts. If you don't get a quality power supply unit with the correct wattage, you may not only end up spending money and electricity, but you could also end up damaging your computer parts.
1) Watts Determine: First, you have to determine how many Watts your system required, and don't forget to leave sufficient headroom for future upgrades. So choose your pc power supply accordingly. So, if your CPU system needs a 500 Watts Power supply at total capacity, it's not wise to get a 550W CPU power supply but, go for a 650W power supply as it will give you some overhead to work with, allowing for potential future upgrades.
To Calculate Your Computer SMPS Watts, You can use any online SMPS calculate. Use This Cooler master Power Supply Calculator "https://www.coolermaster.com/power-supply-calculator"
2) Power Efficiency of SMPS: Generic CPU power supplies are often very inefficient, and they waste a lot of electricity. Choose 80+ SMPS for PC" those power supplies don't waste a lot of electricity and more efficient as well depending on the efficiency level you will get a result in different energy savings.
a) 80 Plus White power supply is 80% power efficient.
b) 80 Plus Bronze power supply is 85% power efficient.
c) 80 Plus Silver power supply is 88% power efficient.
d) 80 Plus Gold is a power supply 90% power efficient.
e) 80 Plus Platinum is a power supply 92% power efficient.
f) 80 Plus Titanium is a power supply 94% power efficient.
A bronze 80 Plus power supply is what most people consider. But you can also go with a more efficient power supply.
3) Protection: A suitable power supply should have built-in protection, like Over Voltage Protection (OVP), which shuts down the SMPS if an excessive voltage is detected. Other safety functions like short circuit protection can be hugely helpful if you encounter power variations, not just to protect the computer SMPS itself. But also to keep your computer safe in potentially damaging power surges.
4) Form Factor: SMPS form factor is the physical size of the power supply unit & the large majority of the cabinet. Standard ATX power supplies should be fine.
PC Power Supply Ratings
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