The Samsung 8GB 2Rx8 PC3L-12800U-11-13-B1 RAM module is a DDR3L memory stick with a capacity of 8GB. It has a speed of 1600 MHz and a voltage of 1.35V. It's a dual-rank memory module with 8 bits per rank (2Rx8). The "PC3L-12800U" designation indicates the memory type (DDR3L) and speed (1600 MHz or PC3-12800). The "11-13-B1" part likely refers to timing parameters like CAS latency (11) and row/column clock (13).