It's always a good idea to figure out what your energy usage is with your build, especially if you have a lot of components.
Power Supply Calculator - PSU Calculator | OuterVision
Power Supply Calculator - Select computer parts and our online PSU calculator will calculate the required power supply wattage and amperage for your PC.outervision.com
Everything connected has a power cost, and you do get the situation where people have a PSU that will meet there needs 90% of the time, but crap out when they try and run something that really ramps up their system. A good PSU is a worthwhile investment.
Also cheap power supplies can have voltage fluctuations.
Agree that a good PSU is an excellent investment. I got a nice SeaSonic 1050W PSU in 2012, still going strong through countless builds and modifications.
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