is it ok to use a 1000W psu for a 500W system?

[anuking92]

Hi Guys,

This is my build. Now, I have been building systems for a while but wondered whether its ok to use a 1000W psu for a 500W system?

https://pcpartpicker.com/user/AnuragTiwari/saved/#view=6HzgXL
Have a look here at the link if u want to.

 

Now the reason I have selected a 1000W EVGA PSU is because it the same price as a 750W corsair or something; Bottomline its cheap, from a reputed brand and is 80+ platinum.

 

So is it bad to go overkill on the PSU?
Will i get a hefty electricity bill because of this? what are the issues with a big psu?
Cheers!

[Jedicake]

The PSU overkill makes the PSU fan go so fast RPM that it begins to hover and eventually take off like a rocket in your system and ends up going to space.

 

Ok sorry lol

 

 

It is not bad to overkill on the PSU at all, electricity bill will be the same regardless of psu size, no issues whatsoever.

[Enderman]

its fine

it will work at peak efficiency near 50%

it will also be quieter

[knight_40k]

It's fine but you are wasting a bit power with such an overkill unit. It shouldn't cause much difference to your electricity bill, but that depends on what power costs in the country you live in. If USA/Canada, not a big deal.

[skylane]

Don't do it. It will set your house on fire....

 

Other than that you should be good to go. It will cost a little more in your electric bill because the sweet spot for most PSU is 50% of maximum rated watts - you'll get the best efficiency 

[Sav]

For such a system it may be too much, but more is always better so I don't see a problem with havin headroom for the future.

[gilm0re3]

The PSU overkill makes the PSU fan go so fast RPM that it begins to hover and eventually take off like a rocket in your system and ends up going to space.

 

Ok sorry lol

 

 

It is not bad to overkill on the PSU at all, electricity bill will be the same regardless of psu size, no issues whatsoever.

Incorrect. Because of the way that the efficiency curve works with a power supply, it will be more efficient closer to 50% load, which means that theoretically, to waist the least amount of electricity, you would want a power supply close to double the power draw expected. So if you have a 500 watt system, getting a 1000w psu is going to *theoretically* give you the greatest efficiency. It's impractical to go for a psu that far over your target wattage, but that's just the way that psu's work.

[CoolaxGaming]

Since when does EVGA make better PSUS then corsair?

[Duskie]

I have a HX1000i myself with a system that only draws around 600W, and efficiency is usually around 85-90%, so it'll be fine.

[GigaScratch]

Since when does EVGA make better PSUS then corsair?

Most of corsair's PSU's are not very good.

Here is a link to a guide for the best Power supplies.

 

[monster_mm]

Okay, I think some people think about power backwards. Which may give the OP the wrong impression regarding their question. "Is it okay to use?" The answer is yes.

 

Power isn't pushed. If you have a 1000watt power supply it's not pushing 1000watts of constant power to your components. 

A 1000watt power supply means that it can safely supply 1000watts if it's asked to.
 

The way electricity works is that it's pulled or drawn by the component(s) that require it. 

This goes the same for all electrical devices. This is why your 100watt light bulb doesn't explode when it's connected to a nuclear power plant that is supplying 4,000 megawatts.

In fact it will do damage when there is under supply of power.

 

In short, as long as all your components add up to use less watts than your power supply, it's 'okay' to use.

 

Using this calculator below will give you a good indication of your power draw. 
http://www.extreme.outervision.com/psucalculatorlite.jsp

 

 

However, there is a few things to consider when buying a PSU.

- Running a PSU at 100% of its rating will be like running as fast as you can on a treadmill. You can do it for a while, but eventually you will fail from fatigue. 
- A power supply will vary in energy efficiency at different wattages. In your specific case, it looks like your PSU is most efficient at 400-500w

 

I say it would be a great purchase. And future proofs you. A good PSU will last 10 years.

 

Source: http://www.techpowerup.com/reviews/EVGA/SuperNOVA_P2_1000/6.html

[Exploded117]

Do it for the #80+Titanium

 

I mainly recommend higher wattage PSUs regardless of the system wattage and because they're usually much better quality. But if you use a too high wattage than what your system draws then you have a %20 chance of becoming a billionaire.

[Guest]

Since when does EVGA make better PSUS then corsair?

Well neither of them make psu's as they use oem's. EVGA use SuperFlower and Seasonic though, who are two of the best around. I would take a high end EVGA unit over any Corsair unit any day of the week. That is not to say that all Corsair units are bad of course.