809208-B21 . Is a DDR4 Module. DDR4 Modules run from 2133 to 3200 MT/s (million transfers per second). This is a 128GB module. Has a Memory Bus Type of PC-19200. Its ECC (Error Correction Code) features prevent data corruption and system failure which is typically ideal for server machines. Has a data transfer rate of 2400 Mhz.
819880-B21 . Operates on 1.05 Volts within speeds between 533 and 800 MT/s (million transfers per second). This is a 8GB module. Contains a PC-17000 Memory Bus Type. Uses ECC (Error Correcting Code), perfect for workstations where system failure must be avoided at all costs. You can expect the data to transfer at a rate of 2133 Mhz.
836220-B21 . Is a DDR4 Module. DDR4 Modules run from 2133 to 3200 MT/s (million transfers per second) Has a total capacity of 16GB (Gigabytes). Contains a PC-19200 Memory Bus Type. Its ECC (Error Correction Code) features prevent data corruption and system failure which is typically ideal for server machines. You can expect the data to transfer at a rate of 2400 Mhz.
NETGEAR Nighthawk AC1900 Wi-Fi USB 3.0 adapter wirelessly connects your laptop or desktop computer to the next-gen 802.11ac technology with Wi-Fi speeds up to 1.9Gbps. Connect the adapter to a USB 3.0 port for fast and efficient data transfer online lag-free gaming and HD streaming at home or on the go. Compatible with next generation Wi-Fi devices and compatible with 802.11ac/n and all legacy Wi-Fi devices.