Power Supplies - Page 2 - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > System Upgrades
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 01-27-2007, 11:40 PM   #11 (permalink)
gone
 
Join Date: Jan 2007
Posts: 2,051
Send a message via AIM to Gabb
Default

Er if the main poster is right then how come the An and Tech benchmark said 2 geforce 8s in Sli peaked out at 520 Wattage...I mean...that makes it seem like a 550 watts is not overkill at all, in fact not enough.

http://www.anandtech.com/video/showdoc.aspx?i=2870&p=18
__________________

Gabb is offline  
Old 01-29-2007, 01:02 AM   #12 (permalink)
Lord Techie
 
Nitestick's Avatar
 
Join Date: May 2005
Location: смерти для спаме
Posts: 8,473
Default

before you post so arrogantly you may want to consider the fact that that is total system power consumption, and no doubt taken as a measurement from the wall. that means that the inefficiency of the power supply wasn't factored in. hypothetically we'll say it's 80% efficient (which may even be a bit generous) that makes the actual total system power usage something like 416w. now the fact is that oh so many people have power supplies well in excess of what they need. next time don't go out to prove someone wrong just because you can't handle manufacturers' marketing being wrong......
__________________

Nitestick is offline  
Old 01-31-2007, 09:39 PM   #13 (permalink)
Monster Techie
 
Join Date: Feb 2005
Posts: 1,946
Default

Quote:
Originally posted by TriEclipse
Just another addition to the thread.

Why Watts Don't Mean Jack.

The wattage of a PSU is a lame way to measure the actual output of a PSU. The total wattage given is the sum of all of the rails on a PSU added up (+3.3V, +5V, +12V1, +12V2, -12V, +5VSB). The way PSU companies will trick you, is by bumping up the Amps on the red rails. These rails are relatively minor, and don't really provide power to any of the major components of your system. However, they still count towards the total power output of the PSU, and this can skewer the numbers. The blue rails, are the important ones. The +12v rails are the ones that provide most of the power to the major parts in your system. The more Amps on this rail, the more power will be supplied to your system.

Example; 400W Forton PSU and 580W Hiper. Both are excellent PSU makers. Look at this;

Forton - +3.3V@22A, +5V@21A, +12V1@18A, +12V2@16A, -12V@0.3A, +5VSB@2A.

Hiper - +3.3V@30A, +5V@36A,+12V1@20A, +12V2@18A,-12V@0.8A, +5VSB@2.5A.

The 580W Hiper PSU has 4Amps more on it's +12v rails than the Forton does. Is 4Amps worth the difference of 180W? Don't make me laugh. So that would mean that this Forton that has been "labeled" 400W is near equal in power to a 580W PSU. Wattage doesn't mean jack.
Great thread. Nice to have you on board with an understanding of electricity....this is good reading too:

http://www.silentpcreview.com/forums...ic.php?t=23916
__________________
LIAN LI PC-7B PLUS II
OCZ MODSTREAM 520W
P4 3.2
2GB KINGSTON
EVGA 6800GS PCI-E
ASUS P5GD1
WD CAVIAR X2
LG DVD BURNER X2
vaderpro is offline  
Old 02-01-2007, 07:53 AM   #14 (permalink)
Techie Beyond Description
 
veg1992's Avatar
 
Join Date: Dec 2006
Posts: 19,993
Default

u should make a new thread called y power wattages mean jack, that would be a great sticky
__________________
I do not accept help requests and/or deleted threads/complaints by PM, Profile or IM/Email. Just ask on the forums! Also, I do have Lockerz invites if you want them, feel free to PM me your email if you want one :0

If I help you, or you just like what I said, rep me by clicking the
or under my avatar; it helps me know that my advice actually helped you.


.. But things don't go according to plan! My Actual Rig, 2009:
veg1992 is offline  
Old 02-02-2007, 12:09 AM   #15 (permalink)
Ultra Techie
 
Join Date: Jul 2006
Posts: 869
Default

Quote:
Originally posted by vernong1992
u should make a new thread called y power wattages mean jack, that would be a great sticky
There's already so many good stickies in the Hardware sections of this forum, heaven forbid I add even more to the clutter. Besides, no guarantee that it would be stickied, so putting it inside a present sticky seemed best. Now if only I could get most people to read past the first post.

Quote:
Originally posted by Gabb
Er if the main poster is right then how come the An and Tech benchmark said 2 geforce 8s in Sli peaked out at 520 Wattage...I mean...that makes it seem like a 550 watts is not overkill at all, in fact not enough.

http://www.anandtech.com/video/showdoc.aspx?i=2870&p=18
Saw that. And yeah, its almost guaranteed that the measurement is out of the wall. And I just made a post about why Wattage doesn't mean anything, and you still use it to justify your argument?

As for being overkill or not; I said that certain 550W PSUs like the Antec True Power Trio were only overkill for a single 8800GTX. It should be just enough for two 8800GTXs. Nvidia recommends 30A for a single 8800GTX, 42A for two should be just inside that recommendation.
__________________
TriEclipse is offline  
Old 02-06-2007, 06:30 PM   #16 (permalink)
Vinsanity
 
BiGyLiLuPdAmIdL's Avatar
 
Join Date: Aug 2005
Location: West Coast Cali
Posts: 1,234
Send a message via AIM to BiGyLiLuPdAmIdL
Default

Is this power supply pretty good for the price? I don't really know much about rails and volts and psu specs, but is this one pretty good for a sub $30 PSU? I mean its 580watts lol.

http://www.newegg.com/Product/Produc...82E16817709011
__________________
New build in progress, but this is what I got for now:
-AMD x2 5200+
-Asus M3A78-EM AM2+
-Buffalo 2x1gb ddr2 800
-Hitachi 250gb Sata HDD
-Antec Minuet Case w/ 350w psu
-Windows 7 Home Premium 64 bit
BiGyLiLuPdAmIdL is offline  
Old 02-06-2007, 11:11 PM   #17 (permalink)
Ultra Techie
 
Join Date: Jul 2006
Posts: 869
Default

Quote:
Originally posted by BiGyLiLuPdAmIdL
Is this power supply pretty good for the price? I don't really know much about rails and volts and psu specs, but is this one pretty good for a sub $30 PSU? I mean its 580watts lol.

http://www.newegg.com/Product/Produc...82E16817709011
Either the meaning of this thread was completely lost on you, or you didn't read it. Read it again, specifically the "Why Watts Don't Mean Jack" section.
__________________
TriEclipse is offline  
Old 02-07-2007, 04:03 AM   #18 (permalink)
Monster Techie
 
Join Date: Feb 2005
Posts: 1,946
Default

Yah, I was gonna say something...but I thought I'd let you do it...^
__________________
LIAN LI PC-7B PLUS II
OCZ MODSTREAM 520W
P4 3.2
2GB KINGSTON
EVGA 6800GS PCI-E
ASUS P5GD1
WD CAVIAR X2
LG DVD BURNER X2
vaderpro is offline  
Old 02-07-2007, 11:31 AM   #19 (permalink)
Banned
 
Join Date: May 2005
Posts: 7,915
Send a message via Yahoo to talldude123
Default

Quote:
Originally posted by BiGyLiLuPdAmIdL
Is this power supply pretty good for the price? I don't really know much about rails and volts and psu specs, but is this one pretty good for a sub $30 PSU? I mean its 580watts lol.

http://www.newegg.com/Product/Produc...82E16817709011

Read the reviews. They're saying that the PSU is actually only 210 watts.
talldude123 is offline  
Old 02-07-2007, 11:35 AM   #20 (permalink)
Ste
Do not Stare at my Avatar
 
Ste's Avatar
 
Join Date: Aug 2005
Location: Upon Gleaning Infinity
Posts: 9,577
Send a message via MSN to Ste
Default

Quote:
Originally posted by BiGyLiLuPdAmIdL
Is this power supply pretty good for the price? I don't really know much about rails and volts and psu specs, but is this one pretty good for a sub $30 PSU? I mean its 580watts lol.

http://www.newegg.com/Product/Produc...82E16817709011
No....
__________________

Ste is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.