: walter biscardi's Blog
: Mac Octo Core RAM upgrade note
For those of you who are purchasing a new Mac Pro Octo Core and planning to upgrade your RAM after the purchase, be aware that Apple's instructions on upgrading are actually wrong.
In my case, I purchased an Octo Core 3.2 with the minimum 2GB RAM and ordered an 8GB Upgrade Kit from Crucial. This consists of 2 sticks of 4GB each. According to Apple's instructions, if you have the standard 2GB RAM configuration (1GB on each Riser) you should install the next pair of RAM equally on each Riser.
So I placed a 4GB stick on Riser A and a 4GB Stick on Riser B. That didn't work. The machine still showed 2GB RAM and all the other memory slots empty. So I contacted Crucial using their handy dandy "live chat" service to speak directly with a support agent.
He told me to move the Apple installed RAM to Riser A and the Crucial RAM to Riser B. Did that, and voila! I have 10GB RAM now showing up in the machine. Just a note for you folks out there and kudos to Crucial for such a handy dandy live chat service. Got me up and running again in less than a minute. Yay!