Pulled from working device.The Samsung 4GB 1RX16 PC4-2666V-UC0-11 M378A5244CB0-CTD Memory RAM is a high-quality DDR4 SDRAM module designed for computer systems. With a total capacity of 4GB and a bus speed of PC4-21300 (DDR4-2666), this memory RAM offers reliable performance for a variety of computing tasks. The DIMM form factor makes it compatible with a wide range of systems, while the ECC memory feature ensures error correction for enhanced stability. Made in the Philippines, this Samsung memory RAM is a dependable choice for upgrading your computer's memory capacity.