Boost your supported Mac Pro's performance with the 16GB DDR4 2666 MHz R-DIMM Memory Upgrade Module from OWC / Other World Computing. Delivering speeds up to 2666 MHz, this module is a memory upgrade designed to improve your computer's start-up times, overall responsiveness, and ability to handle data-intensive applications. ECC (Error-correcting code) technology enables the module to detect and correct the most common kinds of internal data corruption. The module is registered, features a CAS latency of 19 and a power rating of 1.2V, and works on systems with a 288-pin DIMM slot and a DDR4-enabled chip.