Apple iMac "Core 2 Duo" 2.66 20-Inch (Early 2008) , 320 GB Hard Drive, 2 GB RAM - Imagine41
A-Tech 8GB (2 x 4GB) PC3-8500 DDR3 1066/1067 MHz RAM for MacBook, MacBook Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) | 204-Pin SODIMM Memory Kit at Amazon.com
Apple imac 27 inch (2008) 3.06 GHZ Intel Core 2 Duo, 4 Gig Ram (Not Used) | eBay
Good Condition Apple iMac Early 2008, 250GB Storage, 5GB RAM, 2.4GHz | eBay
Install memory in an iMac - Apple Support
parts-quick 6GB Kit (4GB + 2GB) Memory for iMac 2008 Apple MacBook 2009 PC2-6400 800MHz DDR2 SODIMM at Amazon.com
iMac Intel 20" Early 2008 EMC 2210 - used original spareparts for Macs
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book, Mac Book Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) SODIMM Memory MAC RAM Upgrade
Maximum RAM iMac early 2008 | MacRumors Forums
Memory Upgrades for Apple iMac 2008 - Up to 6GB
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2008 iMac Ram upgrade and OS update! - YouTube
Sold: 20-inch iMac Early-2008 // $425 | Denver Mac Repair