Load on Power Supply

[Malick Barr]

I am going to buy a 650w gold power supply. But people keep telling me to get a 550w cause thats going to be enough. I would have power watts usage around 523w( by calculator without adding any extra watts,its basically the maximum watts being used by my components).

 

So, I wanted to know that is running a psu at about 100% load is a good thing (by getting a 550w psu) or getting a 650w psu for about 80% load.

 

My pc specs:

-)Dell T3500 Motherboard

-)Intel Xeon W3530 @2.8GHz(stock not OC)

-) Sapphire Rx 580 nitro+ 8GB Special Edition ( boost clock of 1430MHz)

-) 4*2GB DDR3 Ram

-)SATA 5.9K RPM 500GB Seagate HDD

-)2 2.0 USB

-)Gaming keyboard mouse

 

I have currently Cooler Master MWE gold 650w fully modular in mind.

 

[Juular]

This system ain't gonna consume more than 400W at peak, likely just about 150-200W under typical load, good 550W PSU are indeed would be enough.

[mariushm]

That calculator is very wrong

 

The RX 580 consumes up to around 250 watts when gaming. Should be around 225 watts at stock frequencies, maybe goes up to 250-275w with overclocking.

The Intel Xeon W3530 is unlikely to consume more than 100-120w.

A stick of ram consumes around 2-3 watts, so you're looking at around 10w for ram

The motherboard consumes maybe 20-30w

A mechanical hard drive consumes around 6-8w

A fan consumes around 2-3 watts.

 

So you're looking at most around 400w on 12v, which means any psu that can supply at least 400w on 12v will be enough. Pretty much any modern 500w power supply can supply 400w on 12v, but if you want to be safe, you can go with 550w.

 

 

 

[GoldenLag]

550w PSU is enough to run any modern single-GPU non-HEDT setup. 

 

you wont run into any issues providing it is a good 550w. something the efficiency sticker doesnt indicate