8GB Kit [2x4GB] RAM Memory Upgrade for iMac 11,2 Desktop 21.5 MC509LL/A (DDR3-1066MHz 204-pin SODIMM) When you purchase RAM from 4AllDeals, it comes with a lifetime warranty, as well as lifetime telephone technical support from our US-based technicians. PLEASE NOTE If you do not purchase this module from 4AllDeals direct, you do not get the lifetime warranty or tech support offered in this ad. 204 pin module RAM Memory will speed up your computer!