2 Vs 4 Sticks of RAM – Are There Any Differences?

So, at the moment I am only using one of my 8GB 3200mhz RAM Sticks in Slot 4 and the computer seems to be working fine and as normal The EZ

6 El Capitan All is well EXCEPT that RAM slot 1 isn't recognized Before: 2009 Mac Pro 4,1 2 x quad-core

ram slot 2 and 4 There is no second RAM slot You have 4GB built into the motherboard and you've already found the expandable RAM slot under the silver tin You

ramai slot 1 Because that's the way the slots are wired 1 & 3 on one channel, 2 & 4 on the other channel