Is my power supply too big?

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justinitito

Aug 23, 2018
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0
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Hi everyone,

I have a Corsair RM1000i but I'm worried that it's WAY too much for my system.

Gigabyte Z370 Aorus Gaming 7 Motherboard
Gigabyte Aorus GeForce GTX 1080 Ti Waterforce WB Xtreme Edition
Intel Core i7-8700k 6 Core 4.7 GHz
4x Corsair HD140 RGB Fans
Small EKWB Pump
2x 256GB SSDs
2x 8GB Corsair Vengeance RAM
Standard Wireless PCIe Card
3 short RGB light strips

I'm a little worries, just wanted to ask to make sure, please be specific if possible.

Thanks!
 
Solution
volkgren


Power supplies are most efficient at 50% load. So, technically yes. There would be a slightly larger power draw on a system that only uses 250W with a 1000W power supply than the same 250W system with a 500W power supply. But, the amounts of difference are usually very small.

For instance, your PSU has a 91.1% efficiency at 500W load; and 90.3% efficiency at 200W load. So that's just under 1% less efficiency, and that only matter when your under load. Idle the efficiency is also lower, but the power used is lower too. So, overall the wasted energy is not very much.

Efficiency reference -...
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volkgren

volkgren

Judicious
Aug 13, 2017
5,827
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Power supplies are most efficient at 50% load. So, technically yes. There would be a slightly larger power draw on a system that only uses 250W with a 1000W power supply than the same 250W system with a 500W power supply. But, the amounts of difference are usually very small.

For instance, your PSU has a 91.1% efficiency at 500W load; and 90.3% efficiency at 200W load. So that's just under 1% less efficiency, and that only matter when your under load. Idle the efficiency is also lower, but the power used is lower too. So, overall the wasted energy is not very much.

Efficiency reference - http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story3&reid=449

*No, it doesn't really affect component life if the unit is good enough to last Lower load on the power supply means the power supply will last longer. Efficiency refers to wasted energy in the conversion process. 91% efficiency means 9% of the electricity is lost in the form of heat. It's not usually a concern when the power supply is larger than needed, but only when it's smaller than needed.


**.08% of 250W is 2W. So you would be using 2W more while under load with the 1000W unit as apposed to a 500W unit with the same efficiency at 50% load.

***Sorry for so many edits; but after saying all that I suppose in theory a smaller unit that produces less heat with .08% better efficiency would last longer. But, I think that would just be a theory especially since 550W units typically have different components in them that may not be as durable as the higher wattage models.
 
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