PowerMac G5 Fans Rarely Speed Up.

Discussion in 'PowerPC Macs' started by poopmonkey, Jan 4, 2011.

  1. macrumors newbie

    Jun 5, 2008
    My PowerMac G5 fans hardly ever speed up. I mean they certainly never go full speed or ever close how they sometimes behave on start up. I never get the jet speed noise. Even when I am rendering a movie in FCP, I hardly hear the fans. Right now on idle, iStat pro reports CPU A being 58C and CPU B being 56C. Yet, the fans are still only 400RPM both CPUS Intake/Outake. Anyone know why this is?
  2. macrumors 601


    Sep 16, 2007
    Northeastern Ohio
    That's actually running pretty cool so there is nothing to worry about.
  3. macrumors 68000


    Jul 25, 2008
    Wichita KS
    Right now mine is encoding some video and is running about the same temp. Its fans aren't ramping up either. I think we've gotten to accustomed to laptop fans going crazy all the time, we forget how sophisticated the cooling of a G5 is. Its got 9 fans, so they don't have to be going full blast all the time. Unless its freezing up or shutting down, you're probably just fine.
  4. macrumors 6502a


    Oct 6, 2009
    North Carolina
  5. macrumors 68020


    Aug 22, 2010
    Behind you
    On a side note rendering is not very CPU effective, playing a game etc is much more CPU effective, meaning you get more down in each cycle, so it produces a lot more heat.

    Try playing diablo II or Warcraft III on it, CPU usage is about 50% but my fans are going at 900 rpm

Share This Page