Q: what is the maximum RAM a late 2006 20" iMac can have?

4gB, but only 3gB can be utilized.

Stedman

Hi.

I have a white iMac 20-inch (Late 2006) with Intel core2Duo 2.16GHZ Processor and I want to upgrade my memory. My system reports for memory these:

Memory Slots:

  ECC:          Disabled

BANK 0/DIMM0:

  Size:          1 GB

  Type:          DDR2 SDRAM

  Speed:          667 MHz

  Status:          OK

  Manufacturer:          0xCE00000000000000

  Part Number:          0x4D342037305432393533435A332D43453620

  Serial Number:          0xF71B7551

BANK 1/DIMM1:

  Size:          1 GB

  Type:          DDR2 SDRAM

  Speed:          667 MHz

  Status:          OK

  Manufacturer:          0xCE00000000000000

  Part Number:          0x4D342037305432393533435A332D43453620

  Serial Number:          0xF71B73E1

I have read a lot of things about this, but I was wondering which is the best choice for this upgrade.

My questions are:

-Can I install DDR2 SDRAM or SO-DIMM DDR2 or both?

(Here apple writes and copability for DDR3 SDRAM for my model???)

-I have read that iMacs with installed 4GB Memory (2GB+2GB )have better response and speed from these with 2GB+1GB Memory. Is that true?

-I have to looking for dual channel memory or not?

-Memory's speed must be 667MHZ or 800MHZ or both of them can be istalled to my machine (not at the same time)?

-My memory must have 200pin?Because SDRAM DDR2 have 240pin!

-And finally memory's voltage must be 1,5V or 1,8V?

Please can you help me?