psu efficiency

[utopianexile]

so im trying to conserve power becuase it is very limited. what will give me the most efficiency? for example using a 550w psu for a rig that only requires 350w or using the exact wattage that the pc needs. or will only the bronze rating make a difference?  

[Fasauceome]

Platinum efficiency PSU, and find the efficiency curve of a given unit so that your load wattage is at the most efficient point. Reduce the voltage of the components you use so that they draw less power.

[dgsddfgdfhgs]

1 minute ago, utopianexile said:

for example using a 550w psu for a rig that only requires 350w or using the exact wattage that the pc needs. or will only the bronze rating make a difference?  

80 bronze only guarantee 80 efficient on 20%~100% load, but very often at 50% will reach 90%

look for some 80 bronze psu, which clams it is 90% efficient at 50% load.

if your PC use 400w load, get 800W of that PSU

[LukeSavenije]

31 minutes ago, fasauceome said:

Platinum efficiency PSU, and find the efficiency curve of a given unit so that your load wattage is at the most efficient point. Reduce the voltage of the components you use so that they draw less power.

titanium*

 

but that's going to hurt your wallet if you want a good one

 

i would just get something around the wattage you ACTUALLY need and take the best unit for your money, without worrying about effecientcy

[Spotty]

22 minutes ago, dgsddfgdfhgs said:

if your PC use 400w load, get 800W of that PSU

God fucking dammit. This moronic shit again.
I can't even be bothered, someone else take this one please.

What are your system specs? What will you be using your PC for? How many hours a day will it be on? What model is your current PSU?
Chances are efficiency of the unit between say an 80+Bronze and 80+Gold won't make any appreciable difference to your power bill, at least not that would justify the upfront cost of buying a more expensive PSU.
Considering in another thread a few weeks ago you said you have an AMD RX550 and do light gaming, I can guarantee that the system isn't using 350W. More like less than 150W while the system is under load. So you should be looking at 450w (or 400W) units, since anything below that tends to be junk. Be Quiet Pure Power 11 400W is an affordable 80+ gold rated unit. Bitfenix Formula 450W is another affordable 80+ Gold unit. Even if those are outside of your budget I honestly think you'd be fine with 80+ Bronze, like a Corsair CX450.

[Stefan Payne]

1 hour ago, utopianexile said:

so im trying to conserve power becuase it is very limited. what will give me the most efficiency? for example using a 550w psu for a rig that only requires 350w or using the exact wattage that the pc needs. or will only the bronze rating make a difference?  

For low loads, the Cooler Master V-550 (the old one, with 4 Drive Connectors).

 

And since there are no good, high quality 350W PSU on the market, that's not an option.

Decent ones start at 400 or 450W, more often though 550W.

So with that, the Cooler Master is one of the best choices for low load efficiency.

[Stefan Payne]

1 hour ago, dgsddfgdfhgs said:

if your PC use 400w load, get 800W of that PSU

There is no reason to do that.

Also we had a discussion about efficiency recently.

With more modern Designs, its bullshit to claim "Peak Efficiency"; and more bullshit to claim 50%.

 

The Truth is that many modern PSU reach a high efficiency that's inside the precision of the measurement equipment (around 0,5% or less) between 30-60% load, some even 70%.

 

So the "50%" thing is just a fairy tale based on 3 measuring points.

[seon123]

10 hours ago, dgsddfgdfhgs said:

80 bronze only guarantee 80 efficient on 20%~100% load,

Spoiler

Here's the actual requirement. 

Spoiler

 

10 hours ago, dgsddfgdfhgs said:

but very often at 50% will reach 90%

Feel free to look at the testing results over here, to get an idea of how wrong you are

https://www.plugloadsolutions.com/80PlusPowerSupplies.aspx

10 hours ago, dgsddfgdfhgs said:

look for some 80 bronze psu, which clams it is 90% efficient at 50% load.

No 80+ Bronze rated PSU claims that. If someone wants an efficient PSU, they should get an efficient PSU, not a high wattage one. 

What's more efficient? An 80+ Titanium rated PSU at 100% load, or an 80+ rated PSU at 50% load? Check the link and the requirements to find out. 

10 hours ago, dgsddfgdfhgs said:

if your PC use 400w load, get 800W of that PSU

Could you find me an example of an 800W 80+ Bronze rated PSU that claims to be 90% efficient at 50% load?

[Guest]

12 hours ago, utopianexile said:

so im trying to conserve power becuase it is very limited. what will give me the most efficiency? for example using a 550w psu for a rig that only requires 350w or using the exact wattage that the pc needs. or will only the bronze rating make a difference?  

Just want to make sure you're aware that a PSU only puts out as much power as what's demanded of it.

 

FYI:  The most efficient PSUs are going to be PSUs that are made to meet the new Intel 1.4x design guide.  These are minimum Gold rated PSUs that have 70% efficiency down to 2% load.