PSU Temps??

Discussion in 'Mac Pro' started by goldenhourfilms, Feb 10, 2010.

  1. goldenhourfilms macrumors newbie

    Feb 10, 2009
    I am running a Mac Pro 2008 and after upgrading my OS to Snow Leopard. I noticed that all my fan RPM speeds have dropped to around 600RPM. They use to run around 800 to 900RPM. I downloaded smcFanControl and pushed then back up to 900 to 1000RPM. Still quite but a bit more cooling.

    Anyways the problem is smcFanControl will not change the fan speed of my Power Supply. Its running at 599RPM no matter what speed I move it up too and at around 151F. I feel that might be to hot and do not want to burn it out.

    What I would like to know is what are your PSU temps and fan RPMs and is there a way I can control that fan thats inside the PSU?

    I am using istat pro to monitor fan speeds and temps.

    Thanks everyone
  2. Rt&Dzine macrumors 6502a


    Oct 8, 2008
    I have been experiencing similar temps since getting a new psu in my 2008 Mac Pro a week ago. I just talked to apple and the person I talked to said there is nothing I can do to increase the fan speed. I don't know if that's true. Several days ago it was running at 620rpm, but now it's been consistently running at 599rpm even though the temp hasn't dropped. I'm working on this problem and have a thread about it.

    BTW: I'm still using Leopard.

    p.s. As nanofrog predicted, apple said not to worry about the temperature as long as the machine is working. But at the same time, they couldn't give me a range of what "normal" temperatures should be.
  3. goldenhourfilms thread starter macrumors newbie

    Feb 10, 2009

    Did your other PSU die one you? Just wondering what does a replacement PSU cost from apple?

    What are your PSU temps like?

    I would really like to find out what the max temp the PSU can get to before we should start to worry.
  4. Rt&Dzine macrumors 6502a


    Oct 8, 2008

    My original one started buzzing, so apple replaced it. I almost wish I had left it alone. I still have applecare, but online I think the PSUs cost about $250–$350. Problem is how would you know which ones run hotter.

    I'm going to try to talk to someone higher up on the apple tech ladder about the temperature specs.

    At idle, my temps are about 149° and 139°F (65° and 60°C).

    EDIT: But I'm in the process of finding out if those temps are accurate by using an IR thermometer.
  5. NEUengineer macrumors member

    Feb 11, 2010

    Under full load for my dual core 3ghz MP, my power supply easily reaches 190F. Seeing as 212F is boiling i get worried sometimes. Never had any problems, but 190F is kinda hot... anybody else have temperatures close that? I've seen posts for 150-160F, but nothing else hotter.


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