QNAP RAM-16GDR5T0-UD-4800 16GB DDR5 UDIMM Memory Module
Overview
The RAM-16GDR5T0-UD-4800 is a 16GB DDR5 UDIMM module running at 4800 MT/s, designed to expand memory capacity in compatible QNAP NAS systems. DDR5 at 4800 MT/s delivers roughly twice the bandwidth of DDR4-3200, which matters directly for ZFS-based NAS workloads where metadata operations and deduplication tables compete for memory. If your NAS is bottlenecking on concurrent iSCSI initiators or VM guest RAM, adding a pair of these modules is the targeted fix. Slots accept up to four UDIMMs, scaling total capacity to 128 GB — enough headroom for memory-heavy storage virtualization deployments. For dual-DIMM configurations, QNAP requires matched pairs of identical DDR5 modules to maintain channel symmetry and avoid training failures at boot.
Compatibility
This module is compatible with QNAP NAS appliances equipped with DDR5 UDIMM slots. Confirmed compatible platforms include the TS-h1677AXU-RP (4 x UDIMM DDR5 slots, 128 GB max with this module; expandable to 192 GB with 48 GB DIMMs). The TS-h1677AXU-RP also supports optional ECC memory — the RAM-16GDR5T0-UD-4800 is the non-ECC variant; if your workload demands error correction (financial data, always-on surveillance archives), consider the RAM-16GDR5ECT0-UD-4800 ECC variant within the same NAS storage family instead. Always verify your specific NAS model's QNAP compatibility list before ordering — DDR5 UDIMM slots are not present on all current QNAP models, and mixing non-ECC modules in an ECC-configured system will cause the system to run in non-ECC mode.
Installation Notes
Install modules in matched pairs for dual-channel operation — single-module installs will function but only in single-channel mode, cutting effective bandwidth in half. Clock speed starts at 4800 MT/s; actual operating frequency is set by the NAS platform's memory controller and XMP/JEDEC profile negotiation at POST. Power down completely and discharge static before handling. No tools beyond a standard Phillips screwdriver are required to access the DIMM bay on most QNAP rack models.
