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Half of PC Electricity Wasted - Page 4

post #31 of 41
Quote:
Originally Posted by Sideburns View Post
that's pretty intense..but I'm willing to be the efficiency is higher than 50%..I mean...come on...lol. That's REALLY bad.
Well...your PSU is about 77-87% efficient BUT tons of crappy ones like ones that ship with cases and probably dells are more in line with 60% efficient.
post #32 of 41
I am surprised that all server PSUs aren't 80%+ efficient yet. Higher efficiency means less heat... which means less HVAC costs and prolonged component life due to decrease temps in the cramped cases. Also, I believe that the power consumption costs of a server will be end up more than initial costs after just 3-5yrs.
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post #33 of 41
Quote:
Originally Posted by Sideburns View Post
that's pretty intense..but I'm willing to be the efficiency is higher than 50%..I mean...come on...lol. That's REALLY bad.
Dell?

Need i say more?

That plant a tree thing is useless *not only because you pay for it* when they sell you a PSU with <50% efficiency lol!
post #34 of 41
I'm done with this PSU efficiency thing. I'm going back to coal power.
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post #35 of 41
Taken from an issue of CPU, Computer Power User, May 2007. Article By Joshua Gulick

"Efficiency is another subject of PC power supplies that has caused confusion. Most quality power supplies shipping today should be roughly 80% efficient. This means approximately 80% of the power drawn from the electrical outlet is retained by the PSU and channeled to the individual rails within the PC. For example, if an 80% efficient PSU is supplying 500W, it's actually drawing 625W from the outlet. The missing 20% is usually lost as radiated heat.
The fact that power supply's components generate heat means we will never see a 100% efficient PSU. In fact good power supplies have only recently hit the 80% efficiency mark.
...
Historically, many manufacturers' PSUs' real-world efficiency has been far below the published rating. The operating temperature range or testing conditions used to produce these ratings would never exist in a typical PC. As a result, these so-called high-capacity power supplies would fail even under moderate loads.
...
"The PSU industry is one of the most cheating ones, with very weak regulatory supervision," Theissen says. "this is the main reason for the confusion among end users on which PSU they really need.""

It's a great artcile if anyone is interested in more.
16 pages total with reviews of 19 different PSUs
    
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post #36 of 41
FSP Group, sporting > 85% efficiency, baby!
    
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post #37 of 41
If the conversion between AC<->DC is so wasteful, why not simply let some of the components(that are able to) run directly on AC? At least all hd-motors, fans etc could run on AC, but guess they draw that little energy the savings would be negliable.
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post #38 of 41
Quote:
Originally Posted by Sideburns View Post
that's pretty intense..but I'm willing to be the efficiency is higher than 50%..I mean...come on...lol. That's REALLY bad.
I agree. That means that mommy's celly is pulling more juice then my rig.
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post #39 of 41
Quote:
I hate it when people say "You should spend an extra $500 to upgrade something to save you $20 a year." They have their reasoning wrong. You're not spending the money to benefit you, you're spending the money to benefit your children and grandchildren, etc.
now i dont realy see any one saving money getting the better 500$ PSU but just think in the future when computers need more and more power.I remeber i got a gatway in 1999 and it was the top if the line PC then with a P3 and 30GB hard drive.It only had a 250 watt PSU,Now only 8 years latter high end PCs come with 750 watt or more,Just think in a nother 5-8 years when some one makes a threas asking if a 2000+ watt PSU is good or if they should go with the 3000+ watt,I know that that is a little out there but if we make the change to better PSUs now then the tech has more time to take hold and some day in 10-15 years may be we could see a 100% PSU,I mean just a couple years a go 1 GHz was a lot but look know we have CPUs that can do 8GHz.
    
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post #40 of 41
Quote:
Originally Posted by jonny1989 View Post
now i dont realy see any one saving money getting the better 500$ PSU but just think in the future when computers need more and more power.I remeber i got a gatway in 1999 and it was the top if the line PC then with a P3 and 30GB hard drive.It only had a 250 watt PSU,Now only 8 years latter high end PCs come with 750 watt or more,Just think in a nother 5-8 years when some one makes a threas asking if a 2000+ watt PSU is good or if they should go with the 3000+ watt,I know that that is a little out there but if we make the change to better PSUs now then the tech has more time to take hold and some day in 10-15 years may be we could see a 100% PSU,I mean just a couple years a go 1 GHz was a lot but look know we have CPUs that can do 8GHz.
Alright, $500 was a little excessive of an estimate, but... w/e.

Anyway, we do buy 750W PSU's, but how many users actually use more than 500? (Answer: Anyone runing Dual DX10 cards or one X2900). As GPU and CPU manufacturers test the availability of smaller and smaller fabrication processes (i read some where that 20 nm is being tested), power usage will drop on the power intensiver parts. I wouldn't be suprised if in 5-8 years we are using less power than we are now, as hopefully consumers will make their voices heard and require smaller fabrication processes for less power.

Plus, with smaller fab processes, there'll be a higher potential for OC
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