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What is real output of a 500w psu ?

Hiten Das
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What does the watt rating of a psu mean?

If it is rated for 500 watt, does it mean that it will give output of 500w and suck 600w from wall (80% efficient psu) ?

Or, it means that it will give output of 400w and will suck 500w from the wall (80% efficient psu) ?

 

One Yotuber made me confused.

Please help me!

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6 minutes ago, Hiten Das said:

What does the watt rating of a psu mean?

If it is rated for 500 watt, does it mean that it will give output of 500w and suck 600w from wall (80% efficient psu) ?

Or, it means that it will give output of 400w and will suck 500w from the wall (80% efficient psu) ?

 

One Yotuber made me confused.

Please help me!

 

To keep it simple, if a PSU is 85% efficient across all power loads, and it is rated for 500W continuous...

The power supply is able to output 500W, but it pulls ~580W from the wall socket to be able to do that.

 

The 80W is lost as heat, noise, etc...PSU waste.

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If it's 500W, it will be able to deliver 500W to the computer. (Unless it's some really cheap grey-metal type, then divide it by about 3 to get the actual rating). That means it will pull 600W from the wall if it's 80% efficient.

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The rating is output power.

Except cheap chinese PSUs that have ratings like 4x more than they can actually do.

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The rating is for what it can deliver to the internal components*.  It will draw more than that from the wall. 

 

*In theory.  In reality, fantastic units can survive delivering more than they claim, and crappy ones won't even get close to what they say.

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1 hour ago, Opencircuit74 said:

If it's 500W, it will be able to deliver 500W to the computer. (Unless it's some really cheap grey-metal type, then divide it by about 3 to get the actual rating).

You do know that the casing is not the main component of a PSU? Presence of coating on it is not a measure of PSU's quality.

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6 hours ago, Granular said:

You do know that the casing is not the main component of a PSU? Presence of coating on it is not a measure of PSU's quality.

He told this because, all good psu is made by big companies and the also take care about the look of the psu. that's why the paint the psu with attractive color. and, the psu which come under 10$ usually come without any color or paint on the psu case. sometimes not even the brand name is mentioned on the psu case.

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6 minutes ago, Hiten Das said:

He told this because, all good psu is made by big companies and the also take care about the look of the psu. that's why the paint the psu with attractive color. and, the psu which come under 10$ usually come without any color or paint on the psu case. sometimes not even the brand name is mentioned on the psu case.

All PSUs are made by big companies and then coating is put on those targeted at markets where looks matter.

Just because a PSU in a prebuilt or a server doesn't have powder coating on it, doesn't matter that it's crap.

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2 hours ago, Hiten Das said:

What does the watt rating of a psu mean?

That it can output 500W as PSU are mostly rated for continuous output power.

 

2 hours ago, Hiten Das said:

If it is rated for 500 watt, does it mean that it will give output of 500w and suck 600w from wall (80% efficient psu) ?

Or, it means that it will give output of 400w and will suck 500w from the wall (80% efficient psu) ?

the first, not the latter.

And some PSU Manufacturers are very clear about it...

 

2 hours ago, Hiten Das said:

One Yotuber made me confused.

Youtube is for entertainment, not Information.

"Hell is full of good meanings, but Heaven is full of good works"

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My Corsair AX860i for example seems to have the over current protection set to 110% of the rate power. So it can actually deliver over 900 W.

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5 hours ago, Tam3n said:

My Corsair AX860i for example seems to have the over current protection set to 110% of the rate power. So it can actually deliver over 900 W.

 

Ditto.

Some higher-end PSUs can actually output more power, but are rated a bit lower.

 

@Hiten Das

Big companies also make lower grade power supplies....

  • Corsair VS series
  • CoolerMaster ElitePower
  • EVGA N1 or W1 series

Just because it they painted black ...or whatever colour, does not 100% mean it is better.

Some server grade PSUs are just the unpainted grey metal, but are tough as nails, and are rated for 24/7 non-stop use.

 

 

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12 hours ago, Stefan Payne said:

 

Youtube is for entertainment, not Information.

 

Emm there are some good channels out there (gamers nexus, AHOC, hardware unboxed)

 

So it's ok to watch youtube, but not for power supplies.

 

 

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15 hours ago, Hiten Das said:

What does the watt rating of a psu mean?

If it is rated for 500 watt, does it mean that it will give output of 500w and suck 600w from wall (80% efficient psu) ?

Or, it means that it will give output of 400w and will suck 500w from the wall (80% efficient psu) ?

 

One Yotuber made me confused.

Please help me!

The third post on this category (80+) explains it very well,

Edited by Ryan_Vickers
removed stolen content
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32 minutes ago, 17030644 said:

The third post on this category (80+) explains it very well,

Please do not just copy-paste an entire article into your own post.  If you have something of someone else's to share, quote and/or link it only.

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3 hours ago, Ryan_Vickers said:

Please do not just copy-paste an entire article into your own post.  If you have something of someone else's to share, quote and/or link it only.

but then people don't even want to search where the info is, someone is always going to complain anyway

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3 hours ago, 17030644 said:

Emm there are some good channels out there (gamers nexus, AHOC, hardware unboxed)

 

So it's ok to watch youtube, but not for power supplies.

Exactly, wich is why I said that its for entertainment, not education.

There are some decent channels (L1 Tech), but for that you need to be competent to know that they are competent.

 

Without being competent, you can't distinguish the incompetent from the competent....

"Hell is full of good meanings, but Heaven is full of good works"

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11 hours ago, Tam3n said:

My Corsair AX860i for example seems to have the over current protection set to 110% of the rate power. So it can actually deliver over 900 W.

not reccommended though.

BTW imo AXi under 1200W is the same as HXi

 

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34 minutes ago, Stefan Payne said:

Exactly, wich is why I said that its for entertainment, not education.

There are some decent channels (L1 Tech), but for that you need to be competent to know that they are competent.

 

Without being competent, you can't distinguish the incompetent from the competent....

Yea but they are youtubers and they have more than 100k subs so their opinion is worth more than yours I know it stinks hard

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