Please register or login. There are 0 registered and 1312 anonymous users currently online. Current bandwidth usage: 326.30 kbit/s October 26 - 04:06pm EDT 
Hardware Analysis
      
Forums Product Prices
  Contents 
 
 

  Latest Topics 
 

More >>
 

    
 
 

  You Are Here: 
 
/ Forums / Power Supply Units /
 

  "How Much Power is Enough?" - by Legion Hardware 
 
 Author 
 Date Written 
 Tools 
G. G. Apr 25, 2007, 01:42pm EDT Report Abuse


---------------------------------------------------------------------------------------------------------------------

-
Want to enjoy fewer advertisements and more features? Click here to become a Hardware Analysis registered user.
Mike L. Apr 25, 2007, 02:35pm EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
That is pretty interesting actually. But without some sort of a background in electronics and the right tools, how are you supposed to come up with a figure on how much your system uses, or needs?

___________________________________________
I am what you would call depressingly comfortable...
G. G. Apr 25, 2007, 09:06pm EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
You and I dont have to.... that is why you have review sites like Legion Hardware and others... that do it for you. You just take the information and throw it in the bucket.... stir it with a big spoon.... add some seasoning to your like'n and simmer for a little bit .... in the end you make it what you want it to be....


as the article said.... quad core 2, 4 x 1gb dimms, 4 x 320gb hdds, 2 x 8800GTX in SLi, Striker mb, 6 x 120mm fans, and a water cooling setup...... All at max load of 530watts.... (hopefully they used some type of measuring tool to come up with this max watts)... And they have been successfully been running this rig with a quality 550W psu... Most of us would think that you would need a min of a 750W or more to run this type of rig.

If this test of theirs is true..... then the most important thing of all is to keep "Quality" at the most important item on the list when it comes to this component. And as they mentioned.... scruttenize (sp?) the spec's of a given psu against the claim ratings.

---------------------------------------------------------------------------------------------------------------------

-
shuja rahman Apr 26, 2007, 09:15am EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
Yup thats the truth,,,,,Quality is the first thing when buying something for UR SYSTEM...
Hey dude, if its true, so this means that my system can easily handle 8800GTS, E6600, simple mobo, 1 gig ram, 120GB HD on 650W Asus......

Intel Core2Duo E6420
Intel S975Xbx2
Kingston 1x2 gig ram
120 G.B Sata 2
625 PSU
XFX 7800GT
Beavis Khan Apr 26, 2007, 12:55pm EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
I look at this the same way I look at tires. Sure, I could get by with a tire with an "M" speed rating, as I rarely if ever exceed 81mph, by why not add a little margin for safety, especially when the cost is minimal?

I'd definitely be interested to know more about their measurement methods, too. Easy enough to measure AC usage at the wall (via a Kill-a-watt or similar device), but not sure how they'd get precise measurements in the PC. I guess you'd also have to take into account available amperage vs load on each rail, too.

____
"For every complex problem, there is a solution that is simple, neat, and wrong."

- H.L. Mencken
Mike L. Apr 26, 2007, 04:11pm EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
If I'm not mistaken, wouldn't you have to measure it in some sort of way, after it passes through the PSU? As in, not before, in regards to how much power it's drawing from the wall socket.

___________________________________________
I am what you would call depressingly comfortable...
B Jun 08, 2007, 12:52pm EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
Good read.

john albrich Jun 09, 2007, 08:09am EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
Mike L said:
...But without some sort of a background in electronics and the right tools, how are you supposed to come up with a figure on how much your system uses, or needs?

A first order approximation can be made using online power estimating tools like these.

http://www.extreme.outervision.com/psucalculator.jsp
http://www.jscustompcs.com/power_supply/

Unfortunately, extreme.outervision changed their online tool so you now have to pay a repeating "access fee" to get the detailed "Pro" version (just like certain other kinds of websites) and as they are an ad-driven site, that was a pretty crappy move IMO.

The "Pro" version attempts to estimate power requirements by power rail (which can be misleading because of the design options available to mobo engineers) and it handles multiple graphics cards. But, just keep remembering these are estimating tools.

The journeysystems estimator tool is being revamped at the moment (and has been for awhile) and what is available is simpler than the outervision tool.

Adam Kolak Jun 09, 2007, 09:04am EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
A 550W PSU might power it, but I would feel much safer to have some headroom and get a 700W PSU instead. Even if it never uses the 700W PSU to its maximum power output, at least it isn't putting so much stress on the PSU like it might be on a 550W PSU.

Adam Kolak
Moderator, Hardware Analysis
adam@hardwareanalysis.com
DFI LP P35-T2RS | Xeon Quad @ 3.2Ghz | 4GB DDR2-1000 | 8800GT 512MB | See Profile
john albrich Jun 10, 2007, 01:43am EDT Report Abuse
>> Re: "How Much Power is Enough?" - by Legion Hardware
Adam K. said:
...if it never uses the 700W PSU to its maximum power output, at least it isn't putting so much stress on the PSU like it might be on a 550W PSU.

It also lets the PSU run cooler, which means increased reliability, and in general the outputs should be more stable as there is more headroom for peak power demands from the computer.




 

    
 
 

  Topic Tools 
 
RSS UpdatesRSS Updates
 

  Related Articles 
 
 

  Newsletter 
 
A weekly newsletter featuring an editorial and a roundup of the latest articles, news and other interesting topics.

Please enter your email address below and click Subscribe.