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Thread: FAQ: Power Supplies Explained (Part 1)

  1. #11
    Variable Bitrate
    Join Date
    May 2005
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    San Clemente, CA
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    242
    Another calculator:
    http://www.extreme.outervision.com/

    Quote Originally Posted by PCPower & Cooling
    Component..................Requirement............ .Line(s) Used
    AGP Video Card..............30 – 50W.................+3.3V
    Average PCI Card............5 – 10W....................+5V
    10/100 NIC.......................4W...................... +3.3V
    Floppy Drive.....................5W...................... ..+5V
    CD-ROM.......................10 – 25W...............+5V and +12V
    DVD-ROM.....................10 – 25W...............+5V and +12V
    CD-RW.........................10 – 25W...............+5V and +12V
    7200rpm IDE Hard Drive....5 – 20W...............+5V and +12V
    Case/CPU Fans..............3W (each).................+12V
    Motherboard (w/o CPU or RAM).25 – 40W......+3.3V and +5V
    RAM............................8W per 128MB............+3.3V OR +5v*
    Pentium III Processor.........38W......................+5V
    Pentium 4 Processor..........70W......................+12V
    AMD Athlon Processor........70W......................+12V
    CarPC link above seems to be closest to actual, but most of the calculators underestimate RAM wattage. Compare to PC Power & Cooling's old estimate of 8w per 128MB and you can imagine this could cause some problems. They are easily the most respected PSU manufacturer, because of their powerful, honestly rated power supplies.

    Of course, they want to sell you wattage, so do your own test. Try holding onto your RAM for 5 seconds after using it for awhile and tell me it is only putting out 7-10w...

    It may not pay in money to be conservative in system power estimation, but it will certainly pay in time.
    Audio: 4 * Rainbow Audio Germs + Infinity Basslink / Case: iStarUSA S3 / CPU: C2D P8700 / MB: Jetway NC64-LF / SC: ASUS Xonar Essence STX / RAM: Crucial 2x1GB 1066MHz / HD: MTRON 2.5" 30GB / DVD: Panasonic UJ-815B / PSU: Opus 180w / LCD: Xenarc 700TSV

  2. #12
    FLAC
    Join Date
    Oct 2005
    Location
    Hou. TX
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    1,481
    I could never see the whole eXtreme PSU Calculator CPU list because their text was so large it blocked the wattages so I hacked it a little and got the text file and then tediously seperated all the CPU's. You can then choose the CPU you want in their program and it will show the speed and voltage. Then you can click the overclock option and downclock or undervolt the CPU to see the new lower wattage. Pretty cool. As eXtreme updates the list, I will try to also. My list is from Dec.
    Here is the list:

    Update: It doesn't look like the wattages are displayed next to the processors any more. Use my list to see that info.

    Also keep in mind that AMD list's the max wattage and Intel lists the "typical" or average wattage. Even then AMD's spec'ed max is usually higher than the chip really is. So expect the AMP to be a little less than what is rated and Intel to be a little higher than rated. This is just based on a lot of tests I've read and is pretty general. The bottom line is that AMD and Intel don't really want people to know the actual wattages.
    Attached Files Attached Files

  3. #13
    Newbie
    Join Date
    Oct 2006
    Posts
    26

    FAQ: How much power will I need? Power calculator links!

    POWER CALCULATOR LINKS

    I'm tired of googling this over and over so I'm making some links-

    http://www.journeysystems.com/power_...calculator.php
    little outdated but good for desktop components and older bits.

    http://www.extreme.outervision.com/psucalculator.jsp
    good one for gaming/high zoot systems. Have fun buying four power supplies at 190 bucks a pop for that raid sli gaming system you're intending.

    http://www.mini-box.com/site/resourc...simulator.html
    great for Via Epia and other mini-itx boards

    Please feel free to add any you prefer or that I've missed.

  4. #14
    Variable Bitrate rijndael's Avatar
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    I hate to link to another forum, but i found this about 2 months ago and thought that people who still have questions could benefit from reading this

    http://forumz.tomshardware.com/hardw...ict198276.html

    Mod: feel free to delete my post if you feel i've broken the forum rules.

    Rij

    Edit: another PSU calculator that has updated CPU's (C2D and such) and graphics cards (if you use other than onboard graphics in your car).

    http://www.extreme.outervision.com/p...ulatorlite.jsp
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  5. #15
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    Quote Originally Posted by JasonWW View Post
    Are there any lists of CPU power consumption that includes the current desktop and mobile processors?
    http://users.erols.com/chare/elec.htm

    btw bugbyte and others - I'm working on a new FAQ for the forums.

    I'm going to be going through the FAQ emporium and pulling information from here (copy and paste articles and making a few minor changes to update them mostly).

    If you have work you don't want in there, just let me know.

    This is the first article I'm starting on.
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

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