For the best upgrade performance for your Dell Precision T3500, trust MemoryMasters Memory. Your computer requires a certain type of ram with detailed specifications. Know that offers the best guaranteed compatibility and reliability for your machine. You are receiving the highest quality Grade A brand name computer memory. also comes with a and FREE technical support! Every module is tested before it leaves the factory. This kit comes with 3 Modules with specs: 12GB [3x4GB] DDR3-1333 (PC3-10600) ECC RAM Memory Upgrade Kit for the Dell Precision T3500 Additional Details ------------------------------ Package quantity: 1