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  1. #1
    Joined
    Apr 2003
    Location
    Boston
    Posts
    592

    quick question about power supply!

    hello people,

    I have an Antec 300W PS..

    Ok, this is what I have connected to it:

    3 80mm Fans
    1 10,000rpm Raptor HD
    1 7,500rpm HD
    1 DVD RW/R burner
    2 Leds for my front computer panel
    1 ASUS 9800 pro card
    1 Floppy Drive
    1 Asus Mother Board

    and it has been running fine so far.. I have ASUS probe, where it detects flunctuations in the different voltage lines, and everything seems stable.

    Do you guys think it can handle one more 80mm fan? if not, what is the worst thing that can happen? could I hurt my components, or potentially damage a HD?

    I wish i knew at what percentage of its capacity Im currently at.

    I gotta say, ANTEC makes quality PS, Ive had it for 4 going on 5 years.. been thru 3 different computers iterations.

    anyways, love to hear your educated comments.

    thanks,

    JT
    Desktop:
    Cooler Master Wave Master Black Case
    Barton 2500XP Stock
    ASUS A7N8X Dlx Rev2.0 BIOS1007
    CORSAIR 3200XMSLL 2x256 TWINX DIMMS + 1x512MB 333MHZ Running DUAL
    Thermalright 800SLKu w/Thermaltake SFII + ASII
    ASUS 9800pro 256MB VIVO (4.3 Cats)
    Antec 300W
    37 Gig Raptor Drive
    160 Gig Toshiba Drive
    Lite-on Double Layer DVD-R/RW CD-R/RW
    19" Viewsonic PF790 Flat Display
    Klipsch 4.1 Surround Speakers
    ACT Labs RS Wheel, Pedals + Shifter
    Logitech MX510

    Laptop:
    IBM t42, 14.1" SXGA, 64MB 9600, Centrino 1.7Ghz, 768MB mem, 40Gig Drv, Win XP pro

  2. #2
    Joined
    Feb 2003
    Location
    Massachusetts - U.S.A.
    Posts
    2,004

    Re: quick question about power supply!

    This guide should give you a pretty good idea just how much your stressing your current PSU:

    http://www.firingsquad.com/guides/power_supply/

    Regards, Szandor
    Truth has always been in abundance. Its only due to the lack of its demand that we question its existence. - D. Bast

    Dance like no one is watching - Sing like no one is listening - Live each day as if it were your last. - Old Irish Saying

    H.S.T. - Happy Trails Dr. Gonzo!

  3. #3
    Joined
    Nov 2001
    Posts
    1,294

    Re: quick question about power supply!

    Quote Originally Posted by troostj
    I have an Antec 300W PS..

    3 80mm Fans
    1 10,000rpm Raptor HD
    1 7,500rpm HD
    1 DVD RW/R burner
    2 Leds for my front computer panel
    1 ASUS 9800 pro card
    1 Floppy Drive
    1 Asus Mother Board

    Do you guys think it can handle one more 80mm fan? if not, what is the worst thing that can happen? could I hurt my components, or potentially damage a HD?

    I wish i knew at what percentage of its capacity Im currently at.

    I gotta say, ANTEC makes quality PS, Ive had it for 4 going on 5 years.. been thru 3 different computers iterations.
    JT
    Which 300W Antec PSU do you have? I know of at least 4 different models: 303X, 303XP, & SL300S which has evolved with two different models. An important consideration is the +12V rail rating: the 303X had only 10 amps as I recall while the 303XP and early versions of the SL300S had 15 amps. The current (new) SL300S that I recently bought is rated for 19 amps on the 12V rail.

    With your present hardware, I'd have to assume that you probably have the 303XP or SL300S because I'm pretty sure the old 303X would not be able to run all your hardware. That being said, I'd think you would be able to power an additional 2 or 3 watts for an 80mm fan. But if you start getting random reboots or get kicked out of 3D games back to desktop, chances are your PSU needs to be upgraded with that inventory of components.

    Good luck.

  4. #4
    Joined
    Nov 2001
    Posts
    1,294

    Re: quick question about power supply!

    As for your concern as to whether an underpowered Antec 300W PSU can hurt your components, it could damage something but I've not experienced that yet. I've also had a couple of Antecs that died on me but the components were not damaged. I even had one system that survived a catastrophic PSU failure (tripped the house circuit breaker) when a little lizard got fried inside and its carcass became imprinted on the inside of the sheet metal housing.

  5. #5
    Joined
    Oct 2004
    Posts
    991

    Re: quick question about power supply!

    I guess that's how you make a lasting impression...


  6. #6
    Joined
    Apr 2003
    Location
    Boston
    Posts
    592

    Re: quick question about power supply!

    I checked today, and it is the 303X.

    Everything runs fine, even the extra fan.. but My Floppy drive is not working right.. it is giving me a error on the memory of the Floppy drive.. not sure if this could be caused by the PS.. hmm I also installed new round cables for the floppy, and now, I reverted back to the old cables, and it is still giving me the same problem. The light on the floppy drive, stays lit all the time. hmmm I have to set the BIOS to Floppy drive NONE for it to be able to boot.

    I have the ASUS prob on, and it hasnt sounded any alarms on the Voltage readings.. I have it set to + or - 5% for all rails.

    perhaps i ruined my floppy drive when i installed the new round cables? nah, those are pretty robust.

    To test my machine I played HL2 like for 2 hrs strainght with all settings at max.. never once did my machine act weird. Im concerned about the floppy..
    Desktop:
    Cooler Master Wave Master Black Case
    Barton 2500XP Stock
    ASUS A7N8X Dlx Rev2.0 BIOS1007
    CORSAIR 3200XMSLL 2x256 TWINX DIMMS + 1x512MB 333MHZ Running DUAL
    Thermalright 800SLKu w/Thermaltake SFII + ASII
    ASUS 9800pro 256MB VIVO (4.3 Cats)
    Antec 300W
    37 Gig Raptor Drive
    160 Gig Toshiba Drive
    Lite-on Double Layer DVD-R/RW CD-R/RW
    19" Viewsonic PF790 Flat Display
    Klipsch 4.1 Surround Speakers
    ACT Labs RS Wheel, Pedals + Shifter
    Logitech MX510

    Laptop:
    IBM t42, 14.1" SXGA, 64MB 9600, Centrino 1.7Ghz, 768MB mem, 40Gig Drv, Win XP pro

  7. #7
    Joined
    Oct 2004
    Posts
    991

    Re: quick question about power supply!

    Usaually if the cable is installed reverse the floppy drive light will stay on. Check to see if the cable is backwards.

  8. #8
    Joined
    Apr 2003
    Location
    Boston
    Posts
    592

    Re: quick question about power supply!

    yep, thats exactly what I thought initially, but I checked twice, and its in the proper way! perhaps the rail that feeds the floppy is overloaded?

    I brought down my limits for the ASUS probe down to detect 3% flunctuations, and I did have an alarm go off like twice when I was playing HL2 on the 3.3V rail. This happened when the computer was really challenged, ie in the game lots of enemies at the same time.

    What are the limits of a normal flunctuation in percentage terms?
    Do you think my floppy crapped out?
    What rail does the floppy use?
    What monitoring tool do you use?

    sorry for so many questions!

    thanks
    Desktop:
    Cooler Master Wave Master Black Case
    Barton 2500XP Stock
    ASUS A7N8X Dlx Rev2.0 BIOS1007
    CORSAIR 3200XMSLL 2x256 TWINX DIMMS + 1x512MB 333MHZ Running DUAL
    Thermalright 800SLKu w/Thermaltake SFII + ASII
    ASUS 9800pro 256MB VIVO (4.3 Cats)
    Antec 300W
    37 Gig Raptor Drive
    160 Gig Toshiba Drive
    Lite-on Double Layer DVD-R/RW CD-R/RW
    19" Viewsonic PF790 Flat Display
    Klipsch 4.1 Surround Speakers
    ACT Labs RS Wheel, Pedals + Shifter
    Logitech MX510

    Laptop:
    IBM t42, 14.1" SXGA, 64MB 9600, Centrino 1.7Ghz, 768MB mem, 40Gig Drv, Win XP pro

  9. #9
    Joined
    Feb 2003
    Location
    Massachusetts - U.S.A.
    Posts
    2,004

    Re: quick question about power supply!

    Try MBM5 and/or Speedfan for monitoring

    MBM5:
    http://www.majorgeeks.com/download.php?det=311

    Speedfan:
    http://www.almico.com/speedfan.php

    Regards, Szandor
    Truth has always been in abundance. Its only due to the lack of its demand that we question its existence. - D. Bast

    Dance like no one is watching - Sing like no one is listening - Live each day as if it were your last. - Old Irish Saying

    H.S.T. - Happy Trails Dr. Gonzo!

  10. #10
    Joined
    Oct 2004
    Posts
    991

    Re: quick question about power supply!

    Floppy drive typically uses about .9 amps on the 5V rail. ATX PSU specs are a maximum of +/- 5% of nominal voltage. See section 3.2.1 on page 11 of the document.

    http://www.formfactors.org/developer...20Ratified.pdf

    I use a digital voltmeter (DVM), and digital thermometer for PC measurements. Software readouts are just rough reference points.

  11. #11
    Joined
    Apr 2003
    Location
    Boston
    Posts
    592

    Re: quick question about power supply!

    hmmm.. this floppy deal is reallly strange... Im going to recheck the wires once more when i get home.

    I was looking on line for a new power supply, what you guys think about this one? its really cheap.. is it good?

    http://www.newegg.com/app/viewproduc...153-006&DEPA=0

    or is the antec really worth the 44 dollars more?

    http://www.newegg.com/app/ViewProduc...103-908&depa=0
    Desktop:
    Cooler Master Wave Master Black Case
    Barton 2500XP Stock
    ASUS A7N8X Dlx Rev2.0 BIOS1007
    CORSAIR 3200XMSLL 2x256 TWINX DIMMS + 1x512MB 333MHZ Running DUAL
    Thermalright 800SLKu w/Thermaltake SFII + ASII
    ASUS 9800pro 256MB VIVO (4.3 Cats)
    Antec 300W
    37 Gig Raptor Drive
    160 Gig Toshiba Drive
    Lite-on Double Layer DVD-R/RW CD-R/RW
    19" Viewsonic PF790 Flat Display
    Klipsch 4.1 Surround Speakers
    ACT Labs RS Wheel, Pedals + Shifter
    Logitech MX510

    Laptop:
    IBM t42, 14.1" SXGA, 64MB 9600, Centrino 1.7Ghz, 768MB mem, 40Gig Drv, Win XP pro

  12. #12
    Joined
    Oct 2004
    Posts
    991

    Re: quick question about power supply!

    There is no such thing as "good and really cheap".

    http://www.pcper.com/article.php?aid=51&type=expert

    Starting at $49, one of these will provide good clean, stable power and last.

    http://www.pcpowerandcooling.com/pro...uiet/index.htm

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