General

Engineer's Note

This DDR2-800 VLP RDIMM with ECC and registered signaling is purpose-built for legacy server platforms requiring robust data integrity in space-constrained chassis, making it ideal for memory-intensive virtualization and in-memory database workloads on older dual-socket systems. Its dual-rank x4 organization and CL5 latency balance bandwidth and access efficiency, while the very low-profile form factor ensures compatibility with 1U rack servers where thermal clearance is critical.

Technical Specs & Insights

1. ECC error correction protects critical server operations by detecting and fixing single-bit memory errors, eliminating silent data corruption that could compromise financial transactions or database integrity.
2. Registered signal buffering stabilizes the electrical load on the memory bus, allowing servers to support denser RAM populations without sacrificing signal integrity under heavy multi-processor workloads.
3. Very low profile RDIMM form factor reduces airflow obstruction in compact 1U and blade servers, helping to maintain lower operating temperatures and extend system lifespan.
4. Dual rank x4 organization interleaves memory accesses across more banks, increasing available concurrency and boosting effective bandwidth for virtualized environments running numerous simultaneous VMs.
5. DDR2-800 operating speed provides sufficient data throughput for legacy enterprise platforms, keeping essential line-of-business applications like email and web serving responsive under consistent user load.

Why These Specs Matter

For dense server deployments where reliability is non-negotiable, the MT36HVS51272PZ-80EH1 is a 4GB DDR2-800 VLP RDIMM engineered to solve real operational pain points. The ECC technology continuously corrects single-bit memory errors caused by background radiation, which is critical when a single flipped bit inside a virtual machine could silently corrupt your hypervisor state or in-memory database transactions, forcing you to rebuild a degraded RAID array or lose financial records. The registered signal buffer isolates the command and address buses, enabling your motherboard to support far more DIMMs per channel without electrical loading issues. This becomes essential when you are scaling an in-memory caching layer like Redis or Memcached: you can pack the server with enough stable capacity to hold massive datasets in RAM, keeping sub-millisecond response times under heavy OLTP loads. Its dual rank x4 organization leverages rank interleaving to hide row-cycle latency, so while one rank is refreshing, the other processes data—effectively increasing sustained throughput in a multi-tenant virtualized cluster where dozens of VMs contend for memory I/O. Finally, the very low-profile form factor maximizes airflow in 1U or blade servers, directly lowering thermal throttling risk and extending component lifespan, which translates to fewer costly night-time emergency maintenance windows for your data center operations.

Endurance & Reliability

General Virtualization
For a dual-socket server using DDR2 Registered memory, populate all channels symmetrically to guarantee capacity and stable interleaving. An eight-module deployment (32 GB total, four identical 4GB RDIMMs per CPU) provides a solid footprint for moderate virtual machine densities. If the board offers 16 DIMM slots, filling them with matched 4GB modules delivers 64 GB for larger VM farms, with channel interleaving improving overall throughput.

In-Memory Database
In-memory databases demand maximum capacity and low latency; fill every available slot with these identical 4GB Registered ECC DIMMs, targeting 64 GB on 16-slot platforms. Enable node or channel interleaving in the BIOS to accelerate large dataset access. Dual-rank x4 construction is ideal here, as its bank-level parallelism and signal integrity reduce fetch latencies for sizeable in-memory tables.

High-Performance Computing (HPC)
HPC workloads often favor raw bandwidth. To sustain full DDR2-800 speed, install one DIMM per channel (e.g., two modules per CPU for a dual-channel server, yielding 8 GB). If the simulation requires more capacity and a slight drop to DDR2-667 is acceptable, populate two DIMMs per channel (16 GB total) while keeping all ranks strictly matched. The VLP form factor ensures proper airflow and thermal clearance in dense compute nodes or 1U sleds.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge 2970, HP ProLiant DL385 G2, IBM System x3655.

FAQ