Mac Pro 5,1 cpu upgrade question..

Discussion in 'Mac Pro' started by neant, Jan 26, 2016.

  1. neant macrumors newbie

    Joined:
    Oct 3, 2014
    #1
    hello.. i have upgraded the mac to a 3,33 ghz hex cpu. After the installation the mac chimed but there was a blinking red light on the cpu tray , the computer closed itself after entering the OS.. it seemed like overheating so i made the heatsink more tight. Now the light blink a few seconds at boot time and stop.. the mac enter osx and seemed to be normal.. my question is it normal to have this red light blink a few seconds at boot ? i cant remember if it was there before.. thanks
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    Which red LED? Any marking / name next to it (or a photo is even better)? From memory, the CPU overheat LED is on the mobo, but not the CPU tray. And the LED on the CPU tray is for the RAM.

    How did you clean up the CPU, heatsink, and apply thermal paste?

    Do your Mac has all the RAM recognised?
     
  3. neant thread starter macrumors newbie

    Joined:
    Oct 3, 2014
    #3
  4. steveOooo macrumors 6502a

    Joined:
    Jun 30, 2008
    Location:
    UK
    #4
    Ayone know What's the pin that's inside the heatsink does / is called? I managed o bend it whilst asking the heatsink off -

    Skip to 1m49s:

     
  5. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #5
    Not sure, but for me, that looks like just a pin to guide the heatsink to the correct position.
     
  6. rawweb macrumors 6502a

    rawweb

    Joined:
    Aug 7, 2015
    #6
    Agree, I've only ever encountered an LED on tray with ram issues. CPU stuff should be on LB.

    OP, pull out the tray, take out the ram, mix it up (assuming all is matching), and reseat it. Could be that simple...
     

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