3 Ram Slots not working after 5,1 upgrade and processor install
Mar 31, 2018
Maybe you can help. I did this upgrade on MacPro 4, 1-Did the firmware upgrade to 5,1. Completed the hardware install as listed above with 3.33 ghz processor. Started it up and only one of the Ram in working. Red LEDS on next to the back 3 ram slots. Switched around the Ram (although they are all the same for both the 4,1 & 5,1 models) to no avail. So I have only the #1 Ram slot working. Did the Pram reset a number of times. Did I screw up the board plane? Is that possible? I was extremely careful. Any thoughts on this would be appreciated.