Help needed for RAM choice. [SOLVED]

[LostSoul80]

Hi everybody,
I have to update an iMac. It's pretty old (relatively - late 2006), and i'm in doubt on which RAM should I buy.
From the System Profiler, I can see it's an iMac5,1, which is using 2x512MB of DDR2 RAM 667 mhz.
I've seen this Kit 3 GB (2+1 GB) SODDR 2 667 for iMac Intel, but it says SODDR, not DDR! Is that a problem?

Thanks in advance

 

[Hellhammer]

Here

 

[CanadaRAM]

The iMac5,1 can take 2 x 2 GB DDR2-667 SODIMMs however OSX will only recognize 3 GB of the total (it's a hardware limitation of the motherboard)

There is a small advantage to putting in 4 GB, because you'll get a 6% - 8% speed increase overall vs. putting in a 1 GB + a 2 GB. This is because a matched pair (2 GB + 2 GB) can do Dual Channel memory access.

You have a slight confusion in the terms. Here's the breakdown.

DDR2 is the type of RAM (Double Data Rate 2)
667 is the speed of the RAM in MegaHertz
DDR2-667 is also referred to as PC2-5300 (5300 being the nominal data throughput in Mb/s - 667 MHz x 8 bits)
SODIMM is the module format it comes in (Small Outline Dual Inline Memory Module)

 

[LostSoul80]

Here

Thank you for the link.

The iMac5,1 can take 2 x 2 GB DDR2-667 SODIMMs however OSX will only recognize 3 GB of the total (it's a hardware limitation of the motherboard)

There is a small advantage to putting in 4 GB, because you'll get a 6% - 8% speed increase overall vs. putting in a 1 GB + a 2 GB. This is because a matched pair (2 GB + 2 GB) can do Dual Channel memory access.

You have a slight confusion in the terms. Here's the breakdown.

DDR2 is the type of RAM (Double Data Rate 2)
667 is the speed of the RAM in MegaHertz
DDR2-667 is also referred to as PC2-5300 (5300 being the nominal data throughput in Mb/s - 667 MHz x 8 bits)
SODIMM is the module format it comes in (Small Outline Dual Inline Memory Module)

I agree with you, I'm quite confused about RAM terms and such. Thank you for the explanation. BTW "PC2-5300" is reported also in the site I was looking, so I'll go for 2x2gb.
Thank you again