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 Post subject: You may not need as much wattage as you think.
PostPosted: Tue Mar 20, 2018 8:09 am 
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Joined: Sat Sep 23, 2017 6:49 am
Posts: 110
Website wattage calculators err on the side of caution, to a somewhat extreme degree sometimes. Also, some enthusiasts make recommendations on the basis that the GPU (and GPU) would be overclocked to the highest possible maximum, when most people don't do that.

A build without a video card most likely does not need more than 250w. Even a system with a video card usually doesn't need or benefit from more than 500 watts. A system I built for a friend runs perfectly fine with a GTX 1080 Ti and a 550w power supply. 600+ watts is exaggerated; perhaps for SLI or cryptocurrency mining builds, but neither option is practical for most people.

Some people recommend larger capacities for future-proofing, but due to processors becoming more power efficient over time, it is likely that your more powerful upgrades in the future will be consuming less power - not more.


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 Post subject: Re: You may not need as much wattage as you think.
PostPosted: Wed Mar 21, 2018 2:30 pm 
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Joined: Mon Mar 17, 2008 1:49 pm
Posts: 1597
Location: UK
This is entirely true. Buying a power meter is not an expensive way of checking actual AC consumption to make an educated choice on PSU size.

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 Post subject: Re: You may not need as much wattage as you think.
PostPosted: Thu Mar 22, 2018 8:31 pm 
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Joined: Sat Sep 23, 2017 6:49 am
Posts: 110
Are power meters cheap enough to justify buying them just to test a power supply. In that case, if a builder is uncertain, maybe they should just spend $10-20 more on a power supply with 100 extra watts. Most power supplies today have at least 350-400 watts. If you don't use a video card, this is more than plenty (I doubt a test is even required). Maybe this is only a concern for those looking to overclock their processors to the max.


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 Post subject: Re: You may not need as much wattage as you think.
PostPosted: Fri Mar 23, 2018 6:57 am 
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Joined: Thu Oct 06, 2005 4:36 am
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Location: Monterey Bay, CA
You can get a Kill-a-Watt power meter for under $20. It's a useful tool for seeing what your PC is doing at idle and various loads. It's also a great tool to have around the house to see what appliances are consuming.

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