What does the button on my PSU do?

i have a Mad Dog Multimedia PSU in my latest build. it is made out of all used parts, which im proud of!

Specs:
4x 256mb PC2100 Ram (1gb total)
p4 ht 2.8ghz cpu
wd 160gb sata hard drive
memorex dvd-rom
asus p4c800e deluxe motherboard
nvidia quadro fx 3000 256mb AGP graphics
mad dog multimedia 350w PSU zy35wpsg-d is what it says in the corner of the sticker, i assume its the model #

so the question i have is abouth hte PSU. on the back, next to the fan, is a button asnd 3 leds, a blue one that says A next to it, a green one that says S next to it, and a red one that says T next to it. prssing the button changes which led is lit up. when the blue one is on, the psu is kind of quiet, on green its nearly silent, and on red its rEALLy loud. im not sure what this does, but i usually leave it on the blue setting. AApparently, according to the sticker, the PSU has a thingy where the fan goes faster when the temp is higher. however, the fan speed never seems to get faster/slower while its on the blue led setting. Blue was the sefault setting, and thats what i usuakky runit at. the ANtec PSU calculator i used recommends my computer to use a 275 watt pSU.


my question is, what does the button do? is it simply afan speed controller, or does it actually change the PSU's behavior?

thanks in advance
16 answers Last reply
More about what button
  1. simply a fan speed controller
  2. cool, thanks! do you think itll overheat when i put it on the S which i now presume stands for silent?
  3. No idea, it's an old cheap psu so I'd look to upgrade ( to something that cost's more than $23 )
  4. welll when i got it used it seemed ok becaus of the dual fans and the gold fan grills, but are u sure its cheap?
  5. shovenose said:
    welll when i got it used it seemed ok becaus of the dual fans and the gold fan grills, but are u sure its cheap?

    Can't really say how cheap it was, but it was Compusa's house brand years ago.
  6. 2 things: didnt compusa go out of business?
    and what a "house brand"
    and yes, u do need a name change LOL
  7. Yes, but they have been reborn as an online only store.
    The psu was built for them.
    Got to petition a mod.
  8. AW GEEZ! Those CompUSA housebrand power supplies were made by a Chinese company that had a very bad reputaion for low budget, low quality, power supplies of questionable performance and value. I just posted about that recently. They also made the first Ultra modular power supplies that had all those problems. Ultra now uses other manufacturers.
  9. delluser1 said:
    Can't really say how cheap it was, but it was Compusa's house brand years ago.

    But it has fan grills. :bounce: gold
  10. jsc - roflmao :lol:
  11. jsc said:
    But it has fan grills. :bounce: gold

    Ah, pretty shiny things, always a great selling point :pt1cable:
  12. maybe ill just take an old noisy led fan i have, and replace the 2ndfan in the psu,the one thats on the bottom, and make it have leds. would thst be advised against?
  13. If you open the psu you will void the warranty.
  14. warranyty? i got it used w/out warranty! but do think ill kill it by putting in a different fan?
  15. Replacing a fan will not kill a psu. Just be careful.
  16. ok ill post my success when i do it. it may be in a few days.
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