Miley Cyrus

About RAM upgrade on iMac…?

I’m thinking about upgrading my iMac from 4GB to 8GB RAM with some third-party memory sticks. However, I have a question about the slots for the memory. Does the mid-2010 21.5″ i3 iMac have four slots for memory? In the Apple System Profiler, it says that I have two filled spots with 2GB RAM each in them, named BANK 0/DIMM 1 and BANK 1/DIMM 1. The other two, BANK 0/DIMM 0 and BANK 1/DIMM 0 are listed as empty. However, is that some computer jargon, or actual slots that I can use (so I could put ether 2GB RAM in the remaining two, or a 4GB RAM in one of them)? Are BANK/DIMM names for where the RAM is located?