QNAP RAM-4GDR4A0-UD-2400 4GB DDR4 2400MHz UDIMM Memory Module
Overview
The RAM-4GDR4A0-UD-2400 is a 4GB DDR4-2400 unbuffered DIMM (288-pin) designed for QNAP NAS enclosures that support user-upgradeable memory. Installing validated memory matters in a NAS context: mismatched or unvalidated DIMMs can trigger memory errors under sustained multi-drive rebuild or simultaneous VM workloads, which is exactly when you cannot afford instability. The RAM-4GDR4A0-UD-2400 is validated against QNAP's firmware and hardware stack, reducing that risk versus generic off-the-shelf DDR4.
Compatibility
This module is intended for QNAP NAS systems that specify DDR4-2400 UDIMM support. Consult the QNAP memory compatibility list for your specific enclosure model before ordering — NAS units vary in maximum supported capacity per slot and total addressable RAM. Not all QNAP enclosures accept unbuffered DIMMs; units requiring ECC RDIMM or SO-DIMM form factors are not compatible with this module. If you are expanding an existing QNAP NAS already populated with DDR4-2400 modules, pairing matched-capacity DIMMs in dual-channel configurations (where the platform supports it) will improve memory throughput for network-attached storage workloads involving concurrent users or virtualization.
Installation Notes
Power down the NAS and disconnect all cables before seating the module. DDR4 UDIMMs are keyed — align the notch with the slot key before applying even pressure until both retention clips engage. Mixing DDR4 speeds across slots forces all installed DIMMs to the lowest common speed; if your enclosure already has DDR4-2133 modules installed, adding this 2400MHz module will downclock it to 2133MHz. Verify your enclosure's per-slot and total memory ceiling in QNAP's official compatibility documentation before purchasing multiple modules for a full-capacity upgrade.
