If you're in the market for a high-capacity DDR5 memory kit featuring ECC RDIMMs, this might be your lucky opportunity. NEMIX, a U.S.-based memory and storage supplier that collaborates with major tech firms and the government, has listed a 4 TB DDR5 memory kit. This kit consists of 16x 256 GB ECC RDIMMs operating at 6400 MT with a CAS latency of 52. Notably, the listing comes with a hefty price tag of $70,800, making it accessible only to high-budget hyperscalers or workstation enthusiasts. The 4 TB kit's substantial cost is striking, especially during a time of significant DRAM shortages. This translates to approximately $17.3 per GB, significantly higher than the average $10 per GB for consumer DRAM.

The nearly doubled price of these modules is justified by the advanced technology incorporated into these RDIMMs. They feature off-die error correction chips for ECC, which are not standard in regular DDR5 DIMMs. While DDR5 includes on-die ECC, it does not provide complete error correction on its own. Therefore, additional silicon is necessary for hyperscalers and workstations to achieve full error correction, which is reflected in the price premium. The 4Rx4 rank setup helps maintain smooth performance, and it operates at just 1.1 V, making it quite efficient. With registered buffering and built-in ECC, these modules show why their price point is much higher than traditional DIMMs.
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