QNAP 8GB ECC DDR4 2666 MHz UDIMM Memory Module (RAM-8GDR4ECT0-UD-2666)Enhance the performance of your compatible QNAP NAS enclosure with this 8GB ECC DDR4 2666 MHz UDIMM Memory Module. Designed primarily for the QNAP TS h686 and TS h886 NAS systems, this 8GB, 288 pin UDIMM operates at 2666 MHz and features error correcting code, or ECC, to help ensure that common data writing errors are automatically fixed. Applied Models: TS h686, TS h886, TNS h1083X, TS x83XU, TS x73AU