IBM 46C7419
4GB (2x2GB) PC2-5200 CL5 ECC DDR2 SDRAM FBDIMM
Product Highlights
Keeping legacy IBM System x servers running at peak performance requires memory you can trust. The IBM 46C7419 is a genuine 4GB memory kit consisting of two 2GB Fully Buffered DDR2 SDRAM DIMMs, rated at PC2-5300 (DDR2-667) with CL5 latency and full ECC error correction.
Designed for IBM's System x and BladeCenter server platforms, this FBDIMM kit leverages Fully Buffered technology to reduce the electrical load on the memory controller, enabling higher memory density and more reliable data transfers across the memory bus. Each module features a 240-pin form factor and dual-rank (2Rx8) architecture, delivering a balance of capacity and bandwidth suited to enterprise workloads.
Whether you're expanding an existing System x3400, x3500, x3550, or x3650 deployment, or sourcing replacement memory for a BladeCenter HS21 blade, the 46C7419 is an IBM ServerProven option that ensures validated compatibility and dependable operation. ECC protection safeguards against single-bit errors, making this kit a solid choice for production environments where data integrity is non-negotiable.
Features & Benefits
Fully Buffered DIMM Technology
FBDIMM architecture places an Advanced Memory Buffer (AMB) between the memory controller and DRAM chips, converting parallel signals to a serial interface. This reduces electrical loading, allowing servers to support more DIMMs per channel without sacrificing signal integrity — ideal for scaling memory in dense server configurations.
ECC Data Protection
Error Correcting Code (ECC) memory detects and corrects single-bit errors in real time, preventing silent data corruption. For production servers handling databases, virtualization, or business-critical applications, ECC is essential to maintaining data integrity and system uptime.
DDR2-667 Performance
Operating at 667 MHz with CL5 latency, this memory delivers consistent bandwidth for server workloads. The PC2-5300 specification provides up to 5.3 GB/s of peak theoretical bandwidth per channel, supporting smooth operation under sustained multi-threaded loads.
Matched-Pair Kit
Sold as a 2x2GB kit, the 46C7419 ensures both modules are factory-matched for timing and specifications. Installing matched pairs is critical in FBDIMM-based servers, where mismatched DIMMs can cause POST errors or reduced performance.
Deployment Scenarios
IBM System x Server Memory Expansion
Add capacity to System x3400, x3500, x3550, or x3650 servers that are approaching memory limits. The 4GB kit provides a cost-effective increment for environments running virtualization, middleware, or database workloads that benefit from additional RAM.
BladeCenter HS21 Blade Upgrades
Expand or replace memory in IBM BladeCenter HS21 and HS21 XM blades. The FBDIMM form factor and IBM ServerProven validation ensure drop-in compatibility, minimizing downtime during maintenance windows.
Legacy Server Maintenance & Sparing
Maintain a spare parts inventory for production IBM System x environments still in service. Having tested, genuine IBM FBDIMMs on hand reduces mean time to repair when a memory module fails or triggers ECC errors.
General
Memory Specifications
Physical
Compatibility
Compatibility Notes
IBM ServerProven Compatibility
This memory kit is validated for the following IBM systems:
- System x3400 — Machine types 7973, 7974, 7975, 7976
- System x3500 — Machine type 7977
- System x3550 — Machine type 7978
- System x3650 — Machine type 7979
- BladeCenter HS21 — Machine types 1885, 1915, 8853-xxx
- BladeCenter HS21 XM — Machine types 1915, 7995
- IntelliStation Z Pro — Machine type 9228-xxx
- System x iDataPlex dx340
FRU Part Number: 46C7422
Important: This is a Quad-Rank FBDIMM with AMB+ (Advanced Memory Buffer). Do not pair with non-Quad-Rank DIMMs in the same channel — the system will report a mismatched DIMM-pair and disable the pair at POST. Ensure BIOS is updated to a level that recognizes Quad-Rank FBDIMMs.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| 46C7418 | IBM 2GB (2x1GB) PC2-5300 CL5 ECC DDR2 FBDIMM Kit | Smaller 2GB kit (2x1GB) for systems needing minimal memory expansion at lower cost |
| 46C7420 | IBM 8GB (2x4GB) PC2-5300 CL5 ECC DDR2 FBDIMM Kit | Larger 8GB kit (2x4GB) with Quad Rank (4Rx8) for maximum per-slot density |
| 39M5795 | IBM 4GB (2x2GB) PC2-5300 ECC DDR2 FBDIMM Kit | Earlier-generation 4GB FBDIMM kit without AMB+ buffer — verify BIOS compatibility before mixing |