Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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in this model is the ram potentially upgradeable to 6GB?

I currently have 2, 2GB's stacks of ram for a total of 4GB. can I remove a 2GB and install a 4 GB to make it 6GB. if so, any mem manufactures recommended?

thanks

frank

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I already got that, Dan. I put the serial number/EMC in a comment when I updated the device information, just so the information supplied by the original poster would still be on the record.

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According to EveryMac, your serial number is a 20" Early 2008 iMac:

Keywords=W8836042ZE2..Showing 1 - 1 of 1

iMac "Core 2 Duo" 2.4 20-Inch (Early 2008) 2.4 GHz Core 2 Duo (E8135)

Intro. April 28, 2008 Disc. March 3, 2009

Order MB323LL/A Model A1224 (EMC 2210)

Family Early 2008 ID iMac8,1

RAM 1 GB VRAM 128 MB

Storage 250 GB (7200 RPM) Optical 8X DL "SuperDrive"

This generation can be updated to 6GB PC2-6400 RAM (2G + 4G sticks). It's physically possible to install 2x 4GB sticks for a theoretical 8GB, but Intel's controlling chipset for the CPU won't acknowledge or use the last 2GB*.

iFixit has both chips in stock:

PC2-6400 2 GB RAM Chip

PC2-6400 4 GB RAM Chip

iMac Intel 20" EMC 2133 and 2210 RAM Replacement

If you go looking for this RAM on the used market, be careful to look for PC2-6400 SODIMMs, which are much less common than the slower PC2-5300 SODIMMs and the faster PC3-8500 SODIMMs. The PC2-6400 generation was pretty short; it was used only in the Early 2008 iMacs and the Early 2009 MacBooks, and wasn't around in the Windows marketplace for much more than a year.

As far as brands are concerned, I'm much less fussy than I used to be. Samsung chips are normally regarded as the gold standard, but a lot of RAM companies use Samsung chips. When you're buying new RAM, you should always buy from a retailer that offers a lifetime warranty; RAM does die occasionally, and it's better to have a commitment to replace. Brands that you typically see installed as OEM by Apple with Apple's stickers on them are Samsung, Micron, Hynix and Elpida; these sticks are available rebranded from all sorts of retailers.

I tend to buy my new RAM from OWC in Illinois; they've been a Macintosh-market retailer and manufacturer for nearly 30 years, so I can be reasonably confident that they'll be around long enough to answer a warranty claim - they're not going to disappear before the "lifetime warranty" has gotten close to what I consider an appropriate length. They have excellent customer service, and the people who answer the phone are tech-savvy.

*Computer industry fun fact: The Intel memory controller limitation was universal in Core 2 Duo computers of the era, but most of the big manufacturers (Dell, Sony, HP, Gateway, Toshiba, Acer etc) were perfectly happy to sell you 8GB of high-priced RAM, even though the last 2GB were a total waste of money. Apple was the one major manufacturer that refused to offer the useless expensive RAM as a build-to-order option.

PC2-6400 2 GB RAM Chip Image

Product

PC2-6400 2 GB RAM Chip

$29.95

PC2-6400 4 GB RAM Chip Image

Product

PC2-6400 4 GB RAM Chip

$99.95

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