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How does PSU efficiency affect me and do I really need an 80 Plus Gold Power Supply?

W1zzard

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#26
good writeup

Will there ever be 100% efficient Power Supplies?
second law of thermodynamics says no. but you can get arbitrarily close to it.
 
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#27
I use this website for two reasons. To learn and to help others.

And anyone who helps teach me, I appreciate.

Edit: I also use this website for laughs. Some of you guys are really funny.
 
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#28
yep, TPU be the bomb compared to when i'm on guru3d. Just more of a community lol.

I've personally always wondered when computers wouldn't need PSU's, just be connected directly to the socket with like voltage chips to handle the different voltages. course dunno if that is possible lol
 

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#29
yep, TPU be the bomb compared to when i'm on guru3d. Just more of a community lol.

I've personally always wondered when computers wouldn't need PSU's, just be connected directly to the socket with like voltage chips to handle the different voltages. course dunno if that is possible lol
not with current technology, its not.


then again, in the future they wont bother with this crap - it'll be an internal PSU + battery, powered via wireless transmission (they already have cordless rechargers for various things, its just working on how much power can be transmitted safely, and how far)
 
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#30
never did understand how they transmitted power through the air lol. Speaking of what could become, i feel like its taking forever lol. Yea we now have NB's integrated to the CPU or the SB/NB combined, but still Computers havent really changed in the past 15yrs. I wonder what the next revolutionary change to Computers will be.
 

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#31
never did understand how they transmitted power through the air lol. Speaking of what could become, i feel like its taking forever lol. Yea we now have NB's integrated to the CPU or the SB/NB combined, but still Computers havent really changed in the past 15yrs. I wonder what the next revolutionary change to Computers will be.
same way they transfer TV signals, cell phone signals, 802.11b/g/n and cordless doorbells - with magic.
 
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#32
haha i suppose. Idk radio frequencies are one thing but the whole wireless charging thing, like the that ipod/pad/phone charger pad that you just set your devices on it, just cant' comprehend how the electricity would get through the air to its designation
 

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#33
haha i suppose. Idk radio frequencies are one thing but the whole wireless charging thing, like the that ipod/pad/phone charger pad that you just set your devices on it, just cant' comprehend how the electricity would get through the air to its designation
it doesnt. conversion process. electricity -> radio waves (or magnetic waves) -> electricity
 
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#34
haha i understand it, it just baffles me. we humans are amazing mofo's
 
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#35
Nice write up, very informative.


As for wireless electricity, if it does in fact use magnetic waves, I don't feel comfortable having any of my hdds within the vicinity.
 
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#36
psh HDD, u know that it'll cause cancer XD
 
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#37
not with current technology, its not.


then again, in the future they wont bother with this crap - it'll be an internal PSU + battery, powered via wireless transmission (they already have cordless rechargers for various things, its just working on how much power can be transmitted safely, and how far)
It's actually surprising how much we could do safely. Even over a hundred years ago tesla did something like it with what he called wireless resonant inductive coupling.
 

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#38
I changed up the charts a little, making them bar graphs.

Are they too confusing?

good writeup


second law of thermodynamics says no. but you can get arbitrarily close to it.
I'm still one that says nothing is impossible, or rather nothing is impossible until we believe it is impossible.:laugh:
 
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#39
psh HDD, u know that it'll cause cancer XD
Id rather have my hdd. Cancer just falls under everything else that exists in today's world.
 
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#40
It's actually surprising how much we could do safely. Even over a hundred years ago tesla did something like it with what he called wireless resonant inductive coupling.
I'm not sure what kind of effects tesla's method would have on other electronics at this point. There weren't really any complex electrical devices at the time. As for transmitted power in general it's a pretty terrible idea in radial form. We'd need a fusion reactor on every block to make the power waste feasible and extensive testing to prove we aren't frying ourselves and interfering with other technologies. Centralization is always the wrong approach for this type of thing. Redundancy and independence is the way to go.
 

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#41
Since I need some power, I pick any good brand PSU as long it says 80+. Right now Im still using silverstone 750, which some times ago this is the best PSU I can get with my budget. But still its very lovely since in my area the electricity unstable, even its drop, my system never fail. So I guess 80+ mark doesnt only mean the efficiency, but a "high end" mark to. What I mean is the PSU has some safety for the system. (Sorry cannt speak english much).
 

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#42
Generally, yes. PSUs with 80+ ratings tend to have better build quality than those that don't. However, you also have to consider that the 80+ rating is somewhat new to the PSU market, so if you bought a PSU before they were used, you could still have a very well build unit. A silverstone 750w should be very well built.
 
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#43
Remember that if you use a 240v grid, efficiency goes up around 2%; many Silver units would qualify for Gold on a 240v grid. This is because the 80plus tests are done on a 120v grid. Most of the world uses 220-240v.
 
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#44
Very nice write up. Simple and to the point. Unfortunately my Corsair HX1000 is DEAD. Literally would not power up my computer even at stock setting. Hope Corsair RMA is quick.
 
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#46
Awesome. Few people truly understand the power use to efficiency factors.


And a dollar is a dollar.
 

nesco1801

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#47
Its all about who has the biggest...

I mean LESSER carbon footprint.

God damn hippies. And every one of them is using 850W PSU to power his single 5770 rig. :nutkick:
 
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#48
Well, realistically i'd only need a 400W PSU for my system. But have decided for a 750W one and i'll probably not gonna replace it till it dies. Plus, since i've made it more silent with less air flow it's good that it's rated higher so you have some reserve as far as heat goes. Bigger and more powerful PSU's tend to have better heatsinks...
 

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#50
Its all about who has the biggest...

I mean LESSER carbon footprint.

God damn hippies. And every one of them is using 850W PSU to power his single 5770 rig. :nutkick:
overkill yes, but PSU's are more efficient when they arent at max load