General

Engineer's Note

This VLP RDIMM DDR3-1333 module with ECC and registered signal buffering is engineered for legacy server platforms requiring high data integrity in virtualized environments and memory-resident databases. Its dual-rank x4 organization optimizes bank interleaving for sustained throughput, while the very low profile form factor ensures compatibility with dense 1U rack servers where clearance is critical.

Technical Specs & Insights

1. ECC error correction actively detects and corrects single-bit memory faults, preserving data integrity for virtualized databases and financial transaction logs that cannot tolerate silent corruption.
2. Registered buffering stabilizes command and address signals across fully loaded memory channels, making it possible to scale to massive RAM capacities in multi-socket servers without signal degradation.
3. Dual Rank x4 organization balances access interleaving across internal banks, sustaining consistent channel throughput during peak virtualization density and heavy container orchestration.
4. The Very Low Profile form factor preserves critical airflow clearance in dense 1U rack servers and blade enclosures, directly lowering thermal stress and extending hardware longevity.
5. The 1333 MHz operating speed delivers predictable mid-bandwidth latency, well-suited for hosting steady-state enterprise workloads like web farms, middleware, and memory-cached storage tiering.

Why These Specs Matter

The MT36JDZS1G72PZ-1G4D1 is engineered explicitly for server environments as a Very Low Profile Registered DIMM, making its four defining characteristics vital for enterprise reliability and density. Its ECC capability silently corrects single-bit memory errors caused by background radiation, which in a virtualized cluster running dozens of VMware ESXi hosts means a flipped bit won’t corrupt an entire customer database or crash a critical application, preserving data integrity without downtime. The registered buffer stabilizes signal distribution across the memory bus, enabling a server board to populate up to 18 or 24 identical modules without signal degradation; for an in-memory caching engine like Redis or Memcached, this translates directly into larger, more stable dataset capacity that accelerates query responses for millions of users. Dual-rank x4 organization further interleaves access between two independent ranks on the same stick, boosting sustained bandwidth for memory-hungry virtual machines that contend for shared resources. Finally, the VLP form factor reduces the module height to just 18.75mm, allowing it to seat comfortably in dense 1U rack servers and blade chassis where full-height DIMMs would obstruct critical airflow, safeguarding thermal margins in high-performance computing clusters. Together, these attributes ensure that your server infrastructure scales reliably while protecting every byte of data in motion.

Endurance & Reliability

General Virtualization
This 8 GB DDR3-1333 RDIMM is best deployed in balanced-density virtualization hosts where moderate consolidation ratios are expected. For a typical dual‑socket server with triple‑channel architecture, populate six identical modules per processor to achieve 48 GB per socket, ensuring symmetric memory access and reliable ECC protection. Avoid mixing ranks or speeds to maintain consistent latency and prevent memory‑mode fallback under hypervisor scheduling.

In‑Memory Database
In‑memory databases demand maximum capacity and low latency, yet this module’s 8 GB density limits headroom for large datasets. Deploy a fully‑populated configuration of 12 or 24 identical RDIMMs across both processor memory controllers, yielding 96 GB or 192 GB total, to reduce swap pressure and allow whole‑index caching. Pair with fast storage as a fallback, and always enable registered ECC scrubbing to guard against silent data corruption in long‑running analytical workloads.

High‑Performance Computing
For HPC nodes running tightly‑coupled MPI jobs, populate all memory channels evenly with these VLP RDIMMs to benefit from low profile and improved airflow in dense clusters. A typical per‑node build uses 12 modules (96 GB) per dual‑socket system, delivering sufficient capacity for memory‑bandwidth‑bound simulations while keeping power draw predictable at 1.5 V. Prioritize identical dual‑rank x4 modules across channels to sustain high throughput, and validate NUMA affinity settings to prevent remote‑memory access penalties during large‑scale parallel runs.

Verified Compatibility

Rigorously tested and verified compatible with Dell PowerEdge R720, HPE ProLiant DL380p Gen8, and Lenovo ThinkServer RD630.

FAQ