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xxmazilla

macrumors newbie
Original poster
Dec 16, 2019
2
0
Having a ram issue with my Mac Pro 3,1 (Early 2008). Have 4 4GB sticks of 800 MHz DDR2 FB-DIMM installed. Everything works fine for about 5 minutes, then the computer crashes and restarts. After restarting the machine is reading 2 4GB sticks of ram and 2 2GB sticks of ram. I have bought new ram and risers thinking this would resolve the issue but still no luck. Any ideas?
 

developer13245

macrumors 6502a
Nov 15, 2012
771
1,004
If I remember correctly, the ram modules had to be installed in matched pairs. (??)
Maybe try reseating the modules after blowing out the dust??

I have an old 3,1 I use to run apps I need that are no longer supported on newer hardware macOS versions. Hope you find a solution. Keep us posted.

Good luck.
 
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xxmazilla

macrumors newbie
Original poster
Dec 16, 2019
2
0
Yes you are correct. I have the modules installed with a matched pair on each riser.
 
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