Ballistix Elite 4GB Single DDR4 2666 MT/s (PC4-21300) DIMM 288-Pin Memory - BLE4G4D26AFEA Speeds start at 2666 MT/s Radically increase Memory bandwidth Menacing Black heat spreader and PCB Faster speeds and responsiveness than standard DDR4 Memory Exclusive M.O.D. Utility and thermal sensor allow for real-time temperature monitoring