A-Tech 32GB ECC Registered Memory Kit for HP Z420 Workstation (4 x 8GB) ECC RDIMM DDR3 PC3-12800 1600MHz 240-Pin DIMM 2Rx4 1.5V Dual Rank RAM Upgrade - A-Tech Components, AM146163

• 32GB (4x8GB) DDR3 1600MHz PC3-12800 ECC REGISTERED 2Rx4 1.5V 240-Pin DIMM (ECC-RDIMM) Memory RAM Upgrade Kit Designed for HP Z420 Workstation with a 600W PSU or larger only* (400W PSU has a max memory capacity of 16GB ECC RDIMM) Genuine A-Tech Brand Lifetime Warranty + Free United States Based Technical Support! NOTE: This product was designed specifically for the HP Z420 Workstation and may NOT work in other workstation models. This product will NOT work in any desktop or gaming computers as those systems require non-ECC memory. If you are upgrading a system other than the HP Z420 Workstation, please verify the memory capabilities of your system and installed CPU prior to purchase NOTE: If this product is to be used in conjunction with existing installed memory modules, please take note of the following. The modules in this product are ECC Registered and will NOT operate if mixed with memory modules of a different ECC type such as ECC Unbuffered, ECC Load Reduced or Non-ECC!