DELL A9781930 memory module 64 GB DDR4 2666 MHz ECC Built in USB hub___No 3 W Energy efficiency scale 3 W Energy efficiency scale A to G Energy efficiency class (SDR) G Energy efficiency class (HDR) G Energy consumption (SDR) per 1000 hours 39 kWh Energy consumption (HDR) per 1000 hours 55 kWh Operational conditions Non operating altitude 0 12192 m Operating temperature (T T) 0 40 °C Storage temperature (T T) 25 55 °C Operating relative humidity (H H) 10 85% Storage relative humidity (H H) 5 93% Operating altitude 0 5000 m Packaging content Stand included Yes Cables included AC 2 A • 1 x USB 3 Memory Clock Speed: 2666 Internal Memory Type : DDR4