suchuwato Posted November 1, 2005 Posted November 1, 2005 So, someone asked me today what PFC does, and I had to think about it for a bit. I came up with: P=I*V P=I*V*cosO So, when the phase is out (I against V) cosO is more, when it gets to 90* P=0 The PFC 'thingy' in the PSU corrects the phase so that it doesn't disturb the power system, in other works brings cosO back to 1. Does that make any sense at all? Share this post Link to post Share on other sites More sharing options...
lilkev715 Posted November 3, 2005 Posted November 3, 2005 PSU FAQ (scroll down to the last post) Share this post Link to post Share on other sites More sharing options...
suchuwato Posted November 3, 2005 Posted November 3, 2005 Ah, ok. So I was sorta right. Share this post Link to post Share on other sites More sharing options...
Ste Posted November 3, 2005 Posted November 3, 2005 PSU FAQ (scroll down to the last post) 571086[/snapback] gotta ask ya, I know alot of PSU's but im sure you know more, so u live up to ur avater. What are the most important things when looking for a power supply. brand name aside? Amps on 12V rail weight efficiency other features? Share this post Link to post Share on other sites More sharing options...
suchuwato Posted November 3, 2005 Posted November 3, 2005 More amps the better, the more rails the better. Heavier the better (usually) as it indicates 'higher quality' components. Dunno what you mean by efficiency -- cooling? Share this post Link to post Share on other sites More sharing options...
Ste Posted November 3, 2005 Posted November 3, 2005 More amps the better, the more rails the better.Heavier the better (usually) as it indicates 'higher quality' components. Dunno what you mean by efficiency -- cooling? 571171[/snapback] So basically its what i thought. The efficiecy, I usally see a box for it at least on PSU @ newegg, it says efficiency then like 60-80% i usally see, but what is bad and good ranges? Share this post Link to post Share on other sites More sharing options...
Celcius Posted November 3, 2005 Posted November 3, 2005 Here are more psu factors: noise level voltage accuracy modular or not braided vs sleeved vs regular cables max number of power outputs Share this post Link to post Share on other sites More sharing options...
Ste Posted November 3, 2005 Posted November 3, 2005 Here are more psu factors: noise level voltage accuracy modular or not braided vs sleeved vs regular cables max number of power outputs 571301[/snapback] Yes but that still doesn't help, what are good and bad ranges? And the only good Modular PSU's ive seen are not to cheap. Share this post Link to post Share on other sites More sharing options...
Celcius Posted November 4, 2005 Posted November 4, 2005 (edited) In terms of voltage accuracy, you want your rails to stay as close to their rating as possible. For example, you want your 12v rail to stay as close to 12v as possible; however, psu's aren't that accurate and the best like the antec neopower or pc power & cooling turbo deluxe have 12v rails @ 12.08v or 11.92v. 12.6v is the limit of the atx 2.0 spec and you'd never want a psu with voltages that inaccurate. So basically, you want your rails to be no more than .2v away from their ratings no matter what. (ex. 12.20v on the 12v rail) Some psu's like the OCZ powerstream have adjustable voltage pots so you can tweak your voltages. I hope this helps you. Edited November 4, 2005 by Celcius Share this post Link to post Share on other sites More sharing options...
suchuwato Posted November 4, 2005 Posted November 4, 2005 Also, stay clear of modular PSUs. You're paying more for something you don't need. Get a higher quality normal PSU if you have the money to spend. Share this post Link to post Share on other sites More sharing options...
Ste Posted November 4, 2005 Posted November 4, 2005 Also, stay clear of modular PSUs. You're paying more for something you don't need. Get a higher quality normal PSU if you have the money to spend. 571702[/snapback] http://www.3dvelocity.com/reviews/hiper_type-r/type-r.htm Except for the hiper line, we need to see how they preform though. Share this post Link to post Share on other sites More sharing options...
suchuwato Posted November 4, 2005 Posted November 4, 2005 Shame they are a bit iffy - they come in a really cool tub. Share this post Link to post Share on other sites More sharing options...
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