I have two 1gb stick of ram that meet all the specifications for the iMac 27 except the last one listed in the following Apple support article. Has anyone successfully installed 2 x 1gb pieces of ram alongside the standard 2 sticks the machines ship with ????
http://support.apple.com/kb/HT3912
You can use any Small-Outline dual inline memory modules (SO-DIMMS) that meet all of these criteria:
* PC3-8500
* Unbuffered
* Nonparity
* 204-pin
* 1066 MHz
* DDR3 SDRAM
You can use RAM module sizes of 2 GB or 4 GB in each slot.
http://support.apple.com/kb/HT3912
You can use any Small-Outline dual inline memory modules (SO-DIMMS) that meet all of these criteria:
* PC3-8500
* Unbuffered
* Nonparity
* 204-pin
* 1066 MHz
* DDR3 SDRAM
You can use RAM module sizes of 2 GB or 4 GB in each slot.