Mac Pro 3.1 2.8 GHz 4-core to 8-core upgrade... HELP!!!

Discussion in 'Mac Pro' started by DJTEMPO7, Aug 10, 2014.

  1. DJTEMPO7 macrumors newbie

    Joined:
    Mar 10, 2013
    #1
    Hoping someone might be able to point me toward a solution...

    I just took the dive, and installed a 2nd 4-core 2.8 GHz processor in my Mac Pro 3.1.

    It's all put back together... but when I hit the power button... no "chime", (no death-tone, either), nothing on screen, the monitor doesn't awaken... nuthin. Zilch.

    I was honestly expecting the death-tone and the Sad-Mac, but nothing... well, the fans are running.

    Is there one of the famous "reset" buttons on the motherboard, somewhere that I haven't found yet?

    My only hesitancy before I set off PULLING the new 4-core chip, is that something in the system has been tripped or set-off-kilter, and even going back to the basic 4-core state won't fix the problem.

    Any thoughts, from anyone, would be greatly appreciated.

    Chip Tredo
    214-646-4906
     
  2. DJTEMPO7 thread starter macrumors newbie

    Joined:
    Mar 10, 2013
    #2
    Reset button

    Found the reset button on the motherboard, pressed it with the computer off, no difference.

    Anyone have a chart for what these red LED's on the motherboard are all about?
     
  3. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #3
    You've most likely bought CPU with wrong stepping. You need SLANT one (like stock is), not the SLBBN or QFUK (ES).
     
  4. NOTNlCE macrumors 6502a

    NOTNlCE

    Joined:
    Oct 11, 2013
    Location:
    DMV Area
    #4
    I agree, this would cause the problems you're describing. You for sure want a SLANT E5462 Xeon processor.
     

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