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| Product Type | Memory Module |
|---|---|
| Compliance Standards | RoHS |
| Memory Capacity | 1 GB |
| Memory Technology | DDR2 |
| Product Voltage | 1.8V |
| RAM Speed | 400MHz |
| RAM Standard | DDR2-400/PC2-3200 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL3 |
| Rank | Single Rank x4 |
| Quantity of Pins | 240-pin |
| RAM Genre | RDIMM |
This RDIMM with ECC and registered signaling is purpose-built for server platforms demanding uncompromising data integrity, making it ideal for memory-intensive workloads such as virtualization and in-memory databases. Its single-rank x4 organization balanced with a low CAS latency of 3 ensures reliable, low-latency access and stable signal integrity across dense system configurations.
1. ECC memory actively corrects single-bit errors in real time, safeguarding financial transactions and virtual machine states from silent data corruption.
2. Registered signal buffering stabilizes the command bus under heavy DIMM counts, enabling large-scale server deployments without sacrificing signal integrity.
3. Single Rank x4 organization minimizes electrical load per channel, allowing a higher number of modules to coexist while maintaining reliable access timing in dense racks.
4. CL3 low-latency cycling shortens the gap between read requests and data delivery, directly accelerating response times for database lookups and cached queries.
5. 400MHz clock speed sustains PC2-3200 bandwidth headroom, keeping multiple guest operating systems responsive even during concurrent backup and replication jobs.
The MT18HTF12872Y-40EB3 is a server-class DDR2 RDIMM engineered to solve four critical challenges in enterprise computing. ECC technology detects and corrects single-bit memory errors, a vital safeguard when a virtualized cluster hosting dozens of VMs cannot afford silent data corruption that triggers guest failures or transactional rollback. The registered buffer conditions address and command signals, letting you fully populate all slots with multiple 1GB modules for dense hypervisor farms without the signal collapse that plagues unbuffered DIMMs. With a tight CAS latency of 3 cycles at 400MHz, the module reduces access delays, directly accelerating in-memory database operations such as Redis lookups or real-time analytics in SAP HANA. Its single-rank x4 organization presents a cleaner electrical load on legacy server boards, preventing boot failures and ensuring stable multi-channel configurations. For a VMware host running revenue-critical workloads or a financial trading system that depends on an in-memory cache, this memory’s blend of data integrity, scalability, and low latency translates into continuous uptime, consistent responsiveness, and absolute trust in your infrastructure.
General Virtualization
A single 1GB DDR2-400 RDIMM is far below modern hypervisor requirements. For legacy virtualization hosts, populate all available memory channels with identical 1GB modules to form a balanced multi-channel configuration—typically six or eight DIMMs to reach 6–8 GB. This modest capacity can support only a few lightweight virtual machines; prioritize memory overcommitment features and avoid memory-intensive guests.
In-Memory Database
In-memory databases demand large, low-latency operating sets. With 1GB RDIMMs, fully populate the server’s DIMM slots to maximize total capacity, ideally in a symmetric layout (e.g., 16 modules for 16 GB) to maintain interleaving. Even then, this is suitable only for small test datasets. For production, replace these legacy modules with higher-density DDR2 or newer platforms—1GB DIMMs severely constrain dataset size and performance.
High-Performance Computing
HPC workloads benefit from maximum memory bandwidth. Install an equal number of 1GB RDIMMs per memory channel to enable balanced interleaving and avoid single-channel bottlenecks. In an eight-slot dual-channel server, use eight modules for 8 GB total. Given the 400MHz speed and CL3 latency, performance will be limited; ensure peak bandwidth by enabling channel mirroring or lockstep if supported, but plan a platform refresh for modern HPC demands.
Rigorously tested server memory: compatible with Dell PowerEdge 2900/2950, HP ProLiant DL380 G5, IBM System x3650.
Q: Can I mix this MT18HTF12872Y-40EB3 with other memory modules of different brands or speeds?
A: Mixing this DDR2-400 Registered ECC DIMM with unbuffered or non-ECC modules will cause system instability. Even among compatible RDIMMs, different speeds force operation at the lowest common speed. We strongly advise using identical modules for guaranteed reliability.
Q: Is this memory compatible with my Intel or AMD server platform?
A: This 1GB PC2-3200 RDIMM is designed for older Intel and AMD servers with 240-pin DDR2 sockets supporting registered ECC memory. Please verify your motherboard or server model explicitly requires 400MHz DDR2 Registered ECC DIMMs to ensure proper electrical and logical compatibility.
Q: What is the recommended DIMM population order for optimal performance?
A: Always follow your specific server board's manual. Typically, install this RDIMM in the first slot of the designated channel, then populate identical DIMMs across channels to enable symmetric interleaving. Never leave empty slots between modules in a channel without checking your platform's rules.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a server-grade Registered ECC DIMM built strictly to JEDEC DDR2-400 specifications. It does not support overclocking or XMP profiles, as server platforms prioritize data integrity and stability over memory tuning features.
Q: What warranty and typical failure rate can I expect?
A: This module is backed by a one-year warranty. In properly cooled, static-safe server environments, our DDR2 RDIMMs exhibit an annualized failure rate well below 0.5%. Premature failure is rare but fully covered during the warranty term.