Product Description
1GB DDR2-667 (PC2-5300) SO-DIMM Kit (2×512MB) for Apple iMac Intel 2.33GHz Core 2 Duo 20-inch
Apple iMac Intel 2.33GHz Core 2 Duo 20-inch 1GB Memory Ram Kit

Product Description
1GB DDR2-667 (PC2-5300) SO-DIMM Kit (2×512MB) for Apple iMac Intel 2.0GHz Core 2 Duo 20-inch
Apple iMac Intel 2.0GHz Core 2 Duo 20-inch 1GB Memory Ram Kit

Product Description
1GB DDR2-667 (PC2-5300) SO-DIMM Kit (2×512MB) for Apple iMac Intel 2.33GHz Core 2 Duo 24-inch
Apple iMac Intel 2.33GHz Core 2 Duo 24-inch 1GB Memory Ram Kit

Product Description
512MB DDR2-667 (PC2-5300) SO-DIMM for Apple iMac Intel 2.0GHz Core 2 Duo 20-inch
Apple iMac Intel 2.0GHz Core 2 Duo 20-inch 512MB Memory Ram Upgrade

I have 128MB VRAM and 2GB of RAM. Also I want dual monitors, not mirroring.

Product Description
512MB DDR2-667 (PC2-5300) SO-DIMM for Apple iMac Intel 2.33GHz Core 2 Duo 24-inch
Apple iMac Intel 2.33GHz Core 2 Duo 24-inch 512MB Memory Ram Upgrade

Product Description
512MB DDR2-667 (PC2-5300) SO-DIMM for Apple iMac Intel Core Duo (2.16GHz, 24-inch)
Apple iMac Intel Core Duo

Product Description
512MB DDR2-667 (PC2-5300) SO-DIMM for Apple iMac Intel 2.33GHz Core 2 Duo 20-inch
Apple iMac Intel 2.33GHz Core 2 Duo 20-inch 512MB Memory Ram Upgrade

Product Description
1 GB of RAM for your MacBook, MacBook Pro, Intel iMac or Intel Mac mini.
Two Samsung RAM Memory Modules for total of 1GB 667MHz DDR2 2×512MB SO-DIMM for Apple MacBook, MacBook Pro, Intel iMac & Intel Mac mini

Product Description
APPLE IMAC ALL-IN-ONE DESKTOP – 2.66GHz Quad-Core Intel Core i5 , 8GB DDR3 SDRAM, 1 TB SATA HD, ATI Radeon HD 4850 512MB, 8x double-layer SuperDrive, One FireWire 800 port; 7 watts, Four USB 2.0 ports ,SD card slot, Extreme 802.11n Wi-Fi wireless networking,Bluetooth 2.1 + EDR (Enhanced Data Rate) iSight camera wireless keyboard and mouse, 27-inch (viewable) LED-backlit glossy widescreen TFT active-matrix liquid crystal display with IPS technology 2560 by 1440 pixels , Mac OS X v10.6 Snow Leopard, iLife (includes iPhoto, iMovie, iDVD, iWeb, GarageBand)
APPLE IMAC ALL-IN-ONE DESKTOP – 2.66GHz Quad-Core Intel Core i5 , 8GB DDR3 SDRAM, 1 TB SATA HD, ATI Radeon HD 4850 512MB, 8x double-layer SuperDrive, One FireWire 800 port; 7 watts, Four USB 2.0 ports ,SD card slot, Extreme 802.11n Wi-Fi wireless networking,Bluetooth 2.1 + EDR