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Thread: PSU cooling




  1. #1
    Join Date
    Nov 2003
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    72

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    I got 5 casefans and 1 CPU fan, all are working fine (1 air in, 2 air out...1 in on PSU, 1 out on PSU)

    The only problem I have is the PSU...the air coming out of that thing is waaay hot

    It's a Levicom Silent PSU 450W dual blue led fan

    My question:
    what is the best material/part to use to get the PSU a little bit cooler
    would some heatsinks work? :shrug:

    help me out here :confused:
    Tomorrow today will be yesterday.

    http://members.chello.nl/~m.mulder1/Neokicking.gif

  2. #2
    Join Date
    Jan 2003
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    790

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    I don't know how you cool PSU's, but that sounds normal. My Case temp is usually about 20c, and my PSU temp, even tho its only a 250watt, is MUCH hotter. At least 15c, maybe more.
    Modified Dell 8200 Case:
    -400MHz FSB i850 Intel mobo
    -P4 Williamette Socket 478, 1.9GHz
    -768MB 16-bit PC800 RDRAM
    -MSI GF4 Ti4200 128MB @ 284/581
    -7200 RPM Maxtors: 60GB (2MB) on mobo and 160GB (8MB) on ATA/133 PCI Card
    -Creative Inspire T7700 7.1 Speaker System on an Audigy 2
    -Windows XP Home Edition SP2

    Rock on : peace2: , MiStA K6

  3. Default

    Yeah, dont worry too much about your PSU temp, as its going to be alot hotter than the rest of your case. As long as its running stable, I wouldnt worry too much. They're built to handle the heat they generate, thats why it has 2 fans, and im sure if you opened it up youd see its already full of heatsinks. My system temp is around 32 C, but the air coming out of my PSU (300 watt) is around 40C. If it has adjustable fan control, turn up the speed, if not, the fans are probably automatically controlled by a thermostat inside the PSU (these are usually built in and require no human input to make them work) and then you know its working at the right temp or the fans would be runnning faster.
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  4. #4
    Join Date
    Jan 2003
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    One thing you may have missed: Basically, you have 1 intake fan and 4 exhausts. Others here have told me that intake CFM should slightly exceed exhaust, and I've found it to be true. The suction created by the other exhaust fans may be slowing the flow through the PSU. See if you can get a little more intake somehow, as it looks like your PSU breathes as well as anyone could expect it to (Yeah, I looked it up, thanks for providing the full info). Since you bought a "silent" PSU, I'd expect that you're not interested in making things louder. You could add more intake fans along with a fanbus. That way you could turn down the exhaust fans to a tolerable sound level, and balance out the airflow. Finally: The other guys are right. You needn't worry that your PSU is hotter than the rest of the system. They always are, and that's why they're placed last in line for airflow.
    Good luck with it! :cheers:
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  5. #5
    Join Date
    Nov 2001
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    Ok 1st up is that no matter how may fans are in a PSU it only puts out as much as the strongest fan (eg; 2 x 32cfm fans still only equals 32cfm) but this is the best case configuration I've found with most cases (all case fans are 34cfm and the PSU 32cfm-slight positive pressure);

    <img src="http://forums.tweaktown.com/attachment.php?s=&postid=179451">

    but add a blowhole (see left case in lower pic) and ya wind up with negative case pressure plus a lot of dust/fluff around seams and a rise in temps (both cases where cleaned 6 weeks b4 the pic was taken).

    <img src="http://forums.tweaktown.com/attachment.php?s=&postid=186729">

  6. #6
    Join Date
    Sep 2003
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    i have the same set up as the first pick, but only one fan upfront..i have dust out of the ass..i have to dust everyweek...im looking around for new fans and stuff too.the only reason i have one fan up front is because of modding i did...but what do i need to do
    Lostprophets-

    I've heard all your whining
    All this talk behind my back
    The time is coming
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  7. #7
    Join Date
    Jan 2003
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    The other thing you might consider is taking out one or two of those exhaust fans AND putting in another intake fan. Here's a little story of my case:

    1) OEM from Dell had 1 92mm exhaust for CPU and one exhaust in the PSU. Lots o dust and heat was kind of high.
    2) Added a second HDD and a Ti4200, heat was insane so I put in an antec cyclone blower and opened up the front of my case. Even more dust, but the system was a little cooler.
    3) Got smart and punched a hole in the side and put in an 80mm fan w/ a filter. Opened up a 3.5" bay, made a custom air filter and put a 60mm fan at the end of it. Almost no dust, and the case is MUCH MUCH cooler (10C anyways). However, this configuration gave me about 30CFM in, 75CFM out, bah , so:
    4) Took out the cyclone blower, about 30CFM in, about 40 CFM out. Not perfect, but a heck of a lot better dust wise. Also, my system runs even cooler.

    The lesson learned: fewer but strategically placed fans keep a
    system cooler.

    Cpt. Crappy: Try taking out one of your exhaust fans. Also, is the side fan intake or not? Usually big cases have the chance to accumulate more dust cause there's more areas where the air cant reach to whisk it away.

    Cheers and good luck on your quests for better air flow, : peace2: Mista K6
    Modified Dell 8200 Case:
    -400MHz FSB i850 Intel mobo
    -P4 Williamette Socket 478, 1.9GHz
    -768MB 16-bit PC800 RDRAM
    -MSI GF4 Ti4200 128MB @ 284/581
    -7200 RPM Maxtors: 60GB (2MB) on mobo and 160GB (8MB) on ATA/133 PCI Card
    -Creative Inspire T7700 7.1 Speaker System on an Audigy 2
    -Windows XP Home Edition SP2

    Rock on : peace2: , MiStA K6

  8. #8
    Join Date
    Nov 2003
    Posts
    72

    Default

    Thx for all the replies ( but I still think the PSU gets too hot :p )

    Anyway...here's a pic of my setup...made in paint ;)



    All fans are 80mm

    I wanted to change the front fan, but its kinda hard to reach, so I'll just leave it, rearfan will be changed to blue too if I ever get it delivered (ordered it a week ago)

    The sidefan should be changed to intake? or should I just make another hole above it with intake?

    edit:
    Casetemp= 18 degrees
    CPUtemp= 48 degrees

    casetemp isn't that bad, cpu could be a little bit cooler

    edit2:
    Just saw a 5.25" double cooler, maybe thats something too? :)
    Tomorrow today will be yesterday.

    http://members.chello.nl/~m.mulder1/Neokicking.gif

  9. #9
    Join Date
    Sep 2003
    Posts
    220

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    mista, i have an intake on the side to and it coats my mobo with dust, im sorta overexagerating but there is still more dust then there should be...and to dawizza, change your side to intake, but all the other fans are blowing the right ways, and if you could, get another intake up front....
    Lostprophets-

    I've heard all your whining
    All this talk behind my back
    The time is coming
    The time is now for our attack
    A new sun rising
    A new one in your world of black
    Don't try to stop this
    You will break like glass

  10. #10
    Join Date
    Nov 2003
    Posts
    72

    Default

    guess I'll take a 5.25" dual fan in the bay then, thats about the only option I have :(

    next case I'm gonna focus some more on fan positions...most cases kinda...suck
    Tomorrow today will be yesterday.

    http://members.chello.nl/~m.mulder1/Neokicking.gif

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