Server Memory Guide
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Server Memory — ECC DDR3 & DDR4 Registered DIMMs for Dell, HP & Cisco UCS Servers
Server memory (RAM) is one of the most common upgrade and replacement components in enterprise environments. Resilient Tec stocks ECC registered DDR3 and DDR4 DIMMs that are tested and verified for compatibility with major server platforms including Dell PowerEdge, HP ProLiant, and Cisco UCS.
Adding memory is one of the fastest ways to improve server performance — whether you're expanding a virtualization host, increasing application capacity, or completing a system upgrade.
Memory Type Reference
- ECC (Error-Correcting Code) — required by all enterprise server platforms; detects and corrects single-bit memory errors for data integrity
- Registered / RDIMM — includes a register between the memory controller and DRAM; required for most multi-slot and high-capacity server configurations
- DDR3 — used in older-gen servers (Dell R710/R720, HP DL380 Gen8, Cisco UCS M3)
- DDR4 — standard in current and recent-gen servers (Dell R640/R740, HP DL380 Gen10, Cisco UCS M5/M6)
- Speed/Frequency — verify your server supports the DIMM speed; most servers can downclock faster DIMMs to match the supported maximum
Compatibility Note
Server memory compatibility depends on the specific server model, CPU generation, and existing DIMM configuration. Before purchasing, verify: the server's memory type (DDR3 vs DDR4), maximum supported speed, DIMM slot population rules, and maximum capacity per slot. Contact us if you're unsure — we'll confirm compatibility before your order ships.
The Resilient Tec Guarantee
- ✅ All DIMMs are tested for functionality before shipment
- ✅ Accurate speed, capacity, and ECC type in every listing
- ✅ Warranty included on all memory
- ✅ Talk to a real engineer for compatibility questions