OWC 8GB UPGRADE: Consists of a single 8GB DDR4 3200 PC4-25600 CL22 1Rx8 288-pin 1.2V Non-ECC Unbuffered DIMM Memory RAM Module Upgrade memory module compatible with QNAP models TS-h977XU-RP, TS-h1277XU-RP, TS-h1677XU-RP And TS-h2477XU-RP. 100% COMPLIANT: JEDEC-Standard and ROHS Compliant. Warranty-Safe Upgrade. Designed and Tested to Meet or Exceed all Manufacturer OEM Specs. EASY INSTALLATION: In Most Cases, Installing Memory is an Easy DIY project. Watch our OWC Basic Installation Video for Help. INDUSTRY LEADING: Consumer-friendly Advanced Replacement Program and Limited Lifetime Warranty, which includes Free Tech Support by Other World Computing. Replacement for QNAP part number RAM-8GDR4T0-UD-3200.