: What's really strange is the RAM
: configurations available. Up to 3 GB, and the 3 GB option says 1x1GB,
: 1x2GB. That's strange. So does one slot only support 1 GB and the other 2
: GB? Maybe it's a form-factor thing and the 2 GB stick is really thick. If
: you go to configure one though, and look at the details of the RAM options
: it says " if you'd like the flexibility of easily adding more memory
: in the future, keep two memory slots open by selecting the 1 SO-DIMM
: (rather than 2x512 SO-DIMMs) option." So does it have 3 slots? Why
: not 3x1GB then? Does a 2 GB block a slot? AND, the 20" and 17"
: models have the same RAM options with the same details, but the tech specs
: page says that the 17" model has 2 SO-DIMM slots. There is no
: information about the 20 and 24" models.
From Apple's Knowledgebase:
"These iMac (Late 2006) computers have two SDRAM slots in the bottom of the computer, and comes with at least 512 MB DDR2 SDRAM installed into the top slot.
Although these iMacs will accept up to a 2 GB SO-DIMM in each of the two memory slots, the iMac will only support 3 GB total memory. If you want to maximize the amount of SDRAM in your computer, install a 2 GB SO-DIMM in one slot and a 1GB SO-DIMM in the other.
You can use Small-Outline Dual Inline Memory Modules (SO-DIMMS) that meet all of these criteria:
PC2-5400
unbuffered
nonparity
200-pin
667 MHz
DDR2 SDRAM
You can use RAM module sizes of 512 MB, 1 GB or 2GB in the top or bottom slots.
DIMMs with any of the following features are not supported in the iMac (Late 2006) computers: registers or buffers, PLLs, ECC, parity, or EDO RAM.
Note: If you do install a 2 GB SO-DIMM in both the bottom and top memory slots of the computer, the About This Mac window and Apple System Profiler will both show that you have 4 GB of SDRAM installed. However, Activity Monitor and other similar applications will reveal that only 3 GB of SDRAM has been addressed for use by the computer."
Weird. A 3 GB limit? 32-bit gives you 4 GB. Not to mention that it's a 64-bit system now. At tleast the CPU is 64 bit-comaptable.