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TechBits 9 – Power Supplies Demystified (Part 1 of 2)


I this episode of TechBits, I provide a crash course in understanding power supplies: everything from multiple rails, to available connectors, to wattages and features. ULTIMATECOMPUTERS.NET COMPUTER BUILDING COMMUNITY www.ultimatecomputers.net MY BLOG (JUST RANDOM STUFF THAT I LIKE TO TALK ABOUT, MOSTLY WHAT I’M UP TO) http MY TWITTER FEED (FOLLOW ME ON TWITTER; THE FEED IS ALSO DISPLAYED ON THE SIDE OF MY BLOG) www.twitter.com MY YOUTUBE PROFILE (DUH…AND DON’T FORGET TO SUBSCRIBE!) www.youtube.com

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This entry was posted on Monday, August 23rd, 2010 at 5:07 pm and is filed under Power Supply. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

  1. #1 written by MrCrashReboot August 23rd, 2010 at 17:44

    hi sciguy14, I enjoy watching your videos, I’m suggesting you make a video on motherboard voltage regulators to inform your viewers on quality motherboard components, peace out

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  2. #2 written by sciguy14 August 23rd, 2010 at 17:45

    The wires are not color coded like that. Most power supplies can dynamically select a rail based on load.

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  3. #3 written by TheCompScientist August 23rd, 2010 at 18:07

    so in order to determine what wires are connected to which rails i can look up the specs on the back of the psu, is it possible that the wires may be color-coded to indicate which rails they belong to?
    i just bought a 4 12v rail (19A each) power supply, HEC Zephyr 750w

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  4. #4 written by sciguy14 August 23rd, 2010 at 19:04

    Ground is usually black. Brown may be power sense.

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  5. #5 written by limboy1 August 23rd, 2010 at 19:52

    Ground…I think???

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  6. #6 written by sciguy14 August 23rd, 2010 at 20:05

    It’s on my list…I’ve been very busy.

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  7. #7 written by spartan7942 August 23rd, 2010 at 20:42

    Could you do a cable management video? If you have time.

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  8. #8 written by kkyy23 August 23rd, 2010 at 20:44

    is that makeup? blusher?

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  9. #9 written by kingfreddys August 23rd, 2010 at 21:01

    you’re videos are the clearest and most informative out there. Keep them coming plz.

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  10. #10 written by sciguy14 August 23rd, 2010 at 21:39

    What don’t you understand? I can try to explain myself further if you would like.

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  11. #11 written by xxShanekunxx August 23rd, 2010 at 22:00

    I hate to admit it, but I find myself getting lost. Could you please recommend some study that’s not “a mouse click is done with the left button”,nor quite as advanced as this? Thanks in advance.

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  12. #12 written by XmodsNOS August 23rd, 2010 at 22:02

    i have 200p 24″ screen XD

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  13. #13 written by EnT271 August 23rd, 2010 at 22:04

    i also have some brown wires, know what those are?

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  14. #14 written by AbtinX August 23rd, 2010 at 22:37

    I’ts a great screen, 20 000:1 dynamic contrast and 2ms speed. Only drawback when gaming is that the maximum resolution is set at 1680×1050.

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  15. #15 written by madog28 August 23rd, 2010 at 23:27

    dude not tryin to rag on your amazing videos but do you have cue cards or something

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  16. #16 written by sciguy14 August 23rd, 2010 at 23:53

    Its a samsung syncmaster T220HD

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  17. #17 written by 380SlugPenetrator August 24th, 2010 at 00:46

    What kind of monitor is that in the background?
    It looks really nice.

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  18. #18 written by sciguy14 August 24th, 2010 at 01:40

    You tuck away the wires you don’t need.

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  19. #19 written by XxXGoldblingXxX August 24th, 2010 at 02:09

    I mean There are no connectors to the actual PSU and you get stuck with all the wires outside even when you arent using them

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  20. #20 written by sciguy14 August 24th, 2010 at 02:56

    What do you mean the wires are out?

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  21. #21 written by sciguy14 August 24th, 2010 at 03:25

    I’ve already written the script for my next episode, and the topic is indeed overclocking. Just haven’t had time to film it yet.

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  22. #22 written by JimmyDWins August 24th, 2010 at 03:30

    Thank You SOOO MUCH! I’ve known the power supply was pretty vital for a computer build for some time now but never quite understood the whole rails, amps and voltage thing. This cleared up so much! Now I feel so confident choosing my PS for my build in the summer. Maybe for your next info video do it about overclocking?

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  23. #23 written by XxXGoldblingXxX August 24th, 2010 at 03:39

    I have a PSU (on the comp. i’m building) with all the wires already out, that shouldn’t be a problem should it?

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  24. #24 written by sciguy14 August 24th, 2010 at 04:12

    As per my knowledge, computer PSUs do not step the voltage up first. But I’m not 100% certain. When I said switched, I was talking about PSUs that can use either 120 or 220V, but require you to select the input voltage with a switch on the back.

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  25. #25 written by Films4You August 24th, 2010 at 04:44

    Do Power Supplys step up the power before reducing it, e.g. 240> 2000 then say to 2000> 12, 3.3, 5 volts… Done to make the transformer much more efficient for its size. What do the mean by Switched?

    Thanking you :)

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