OWC 64GB (2x32GB) DDR4 2933 CL21 ECC Unbuffered UDIMM desktop RAM

64GB DDR4 ECC kit for workstations

This 64GB kit contains two 32GB DDR4 2933 CL21 ECC unbuffered UDIMMs. It targets workstations, servers and NAS systems that require error-correcting memory for data integrity. The modules run at 1.2V and conform to JEDEC PC4-23400 specifications. They install in standard 288-pin desktop DIMM slots.

Upgrade from 2133/2400/2666MHz non-ECC DDR4

The kit is backward compatible with 2133MHz, 2400MHz and 2666MHz DDR4 platforms. The jump is worth it when your workload needs ECC protection and higher bandwidth than those slower speeds provide. Dual-channel 2933MHz operation raises throughput for memory-bound tasks such as virtualization, ZFS caches or large dataset processing. Non-ECC systems cannot use the error-correction feature.

Sustained load behaviour with ECC active

Under continuous load the ECC logic detects and corrects single-bit errors without halting the system. Unbuffered topology keeps latency low at CL21 while the 1.2V supply limits heat rise during long compile, backup or database sessions. The absence of a heat spreader means airflow across the bare PCB is the only cooling path; ensure the chassis provides adequate air movement over the slots.