User Guide

iMac (Early 2006 20-inch) Troubleshooting — General Info 148
DDR Memory
The iMac (Early 2006) computer has two SDRAM slots in the bottom of the computer. The iMac
ships from the factory with at least 512 MB of DDR2 SDRAM installed into the top slot. (The
computer may come with more RAM in the top slot or RAM in the bottom slot, depending on
how the computer was ordered from Apple.)
The maximum amount of RAM you can install in the iMac is 2 GB total (a 1 GB SO-DIMM in each
of the two slots). You can use small-outline dual inline memory modules (SO-DIMMS) of 512 MB or
1 GB that meet all of these criteria:
- PC2-5300
- unbuered
- nonparity
- 200-pin
- 667 MHz DDR2 SDRAM
NOTE: DIMMs with any of the following features are NOT supported in this iMac:
- registers or buers
- PLLs
- ECC
- parity
- EDO RAM
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