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Does a higher watt PSU increase my electric bill? - Page 3

post #21 of 29
Quote:
Originally Posted by xd_1771;12389632 
Actually since PSUs are usually more efficient at lower loads (and if PSU is more efficient or as efficient as current one to begin with), it might reduce power bill but ONLY A BIT.

Some are, some aren't. I think mine and your units are like 79% efficient at a 50% load, and like 81% at an 80% load, or something like that. It's been forever since I looked them up, since my unit and yours are very nearly the same. I could be off on this figure. But my point being, it depends on the PSU.

But the point stands (and I think your caps above means you agree with me here)...that its pointless to blow extra money on a PSU, that you're not going to use. Especially if its only going to be saving you say 1% efficiency. We're talking about PENNIES per day difference.
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post #22 of 29
Quote:
Originally Posted by pioneerisloud;12389586 
1) No you're not. If you really think you need to be at 50% load to be efficient, you're wrong. Why does everybody seem to think this? confused.gifProof here. So please stop spreading false information.

2) How can you POSSIBLY be blindly making a PSU recommendation, when you have absolutely NO IDEA what his intended build is? Seriously...

+

For my PSU, there are many professional reviews that show its efficiency curve.
I read 300~310W from Kill-a-watt at load.
That's right within the heart of the X-750 efficiency curve.
With that understanding,..I have room for upgrades, without concern.

For the OP, I went off his sig to help him answer his basic question.

Edit: The $119 shipped, for my unit from the egg, wasn't money wasted.
Edited by kink - 2/14/11 at 7:45pm
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post #23 of 29
If you're worried about your power bill then don't add that SLI setup. That will jump your power consumption.
    
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post #24 of 29
Quote:
Originally Posted by kink;12389732 
+

For my PSU, there are many professional reviews that show its efficiency curve.
I read 300~310W from Kill-a-watt at load.
That's right within the heart of the X-750 efficiency curve.
With that understanding,..I have room for upgrades, without concern.

For the OP, I went off his sig to help him answer his basic question.

Edit: The $119 shipped, for my unit from the egg, wasn't money wasted.

So you would rather spend $120 on a unit..that you will NEVER see the full potential of with that rig, when a $30 Seasonic 380w based unit would have sufficed? Don't give me efficiency curve excuses either. That's an older rig (I'd say 2-3 years at least). You would have saved at MOST $10-30 or so due to efficiency over those years. Compared to saving a good $90 by buying the proper unit for your needs. That $90 could then have bought you a better CPU or GPU or something. Yeah...makes a lot of sense. rolleyes.gif

You have a GREAT PSU. Don't get me wrong on that. But its completely and utterly a waste of money for your rig. I'm sorry to be blunt, but I don't like false rumors being spread. I showed you the proof in a previous post. If you don't like it, oh well.
Quote:
Originally Posted by Ekemeister;12389774 
If you're worried about your power bill then don't add that SLI setup. That will jump your power consumption.

This. Saving a few pennies everyday at most, isn't going to help out much (by trying to get the highest possible efficiency you can). If you're that worried about power consumption, then you should be backing the overclock down some, or losing some GPU horsepower.
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post #25 of 29
You've saved me the trouble of a rant in this thread, pioneer. smile.gif
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post #26 of 29
Usually a PSU has an efficiency curve which peaks somewhere around 50% load, but regardless of efficiency, you get a PSU based on what you're running, not the other way around. Find your average power usage for the setup, and maybe 1.1-1.5x that should do it perfectly, unless you want big room for expansion. I nabbed the deal on that X650 on Saturday, but it's not an overpowered waste. My CM600W failed, and I will be getting a new GPU in the future, if not maybe two. Efficiency is not your only reason to get a power supply, although it is useful to minimize power draw under certain loads relative to other power supplies on the same setup.

TBH, pioneer is putting up the best points here. smile.gif
 
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post #27 of 29
Quote:
Originally Posted by Nick0matic;12390275 
Usually a PSU has an efficiency curve which peaks somewhere around 50% load, but regardless of efficiency, you get a PSU based on what you're running, not the other way around. Find your average power usage for the setup, and maybe 1.1-1.5x that should do it perfectly, unless you want big room for expansion. I nabbed the deal on that X650 on Saturday, but it's not an overpowered waste. My CM600W failed, and I will be getting a new GPU in the future, if not maybe two. Efficiency is not your only reason to get a power supply, although it is useful to minimize power draw under certain loads relative to other power supplies on the same setup.

TBH, pioneer is putting up the best points here. smile.gif

Considering that you're planning on immediate GPU upgrades (and with an 8400GS, I don't blame you tongue.gif)...then you might have just picked a perfect unit smile.gif.

But you buy a PSU based off need, not efficiency or "future upgrades".

I mean honestly...how often do MOST of us upgrade to the point of needing a bigger PSU? I could have gotten the TPN 550 for my sig rig, and never have to worry about it. Only reason I have the 650 was because of a free upgrade from an RMA of my old TruePower Trio 650w that I paid $40 for, used....years ago.
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post #28 of 29
I think the psu only draw what it needs, i have a 750 and it draws about 500 using a meter.
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post #29 of 29
Quote:
Originally Posted by razr7;12390398 
I think the psu only draw what it needs, i have a 750 and it draws about 500 using a meter.

That's 500w....from THE WALL wink.gif. Factor in efficiency to that as well. Say your PSU is 80% efficient at that wattage (just pulling an easy number). That means you're only using 400w worth of DC power.

Considering you're on a Toughpower, those aren't all that efficient. I'd wager and say your setup is actually drawing around 320-350w or so at MOST, during a full system (Prime95 + Furmark at the same time) load.

EDIT:
But yes, you are correct. PSU's will only draw what the load requires them to draw.
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