16GB [2x8GB] DDR3-1600 (PC3-12800) RAM Memory Upgrade Kit for the Dell XPS 8500 8GB DDR3-1600 PC3-12800 Non ECC Unbuffered 240 Pin 1.5V CL=11 Memory 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. Put your trust in a company that has been in business for 12 years, not some fly by night seller you won't be able to get ahold of! 100% Guaranteed Compatible for the computer listed in the title of this ad