DDR4 Memory
DDR4 ECC RDIMMs and LRDIMMs — In Stock for 14th and 15th Gen Servers
Enterasource stocks DDR4 ECC registered DIMMs (RDIMMs) and load-reduced DIMMs (LRDIMMs) for Dell PowerEdge 14th and 15th generation servers and HPE ProLiant Gen 9 and Gen 10. DDR4 server memory operates at 2133, 2400, 2666, and 3200 MT/s depending on the processor and platform. All memory is tested with full diagnostic passes before listing — not just visually inspected.
RDIMMs (Registered DIMMs) are the standard choice for most server deployments up to 1.5TB total per 2-socket server. LRDIMMs (Load-Reduced DIMMs) use a buffer chip to reduce the electrical load on the memory controller, enabling higher DIMM counts and maximum memory configurations (up to 3TB for R640, up to 8TB for R750) that would not be possible with RDIMMs alone.
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Micron MTA144ASQ16G72LSZ-2S6E1 128GB DDR4-2666V-L PC4-21333 2S4Rx4 ECC LRDIMMAvailability: Available by QuoteManufacturer: Micron Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock - Samsung M393AAK40B42-CWD 128GB DDR4-2666V PC4-21300 2S4Rx4 Server Memory ModuleAvailability: Available by QuoteManufacturer: Samsung Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Hynix HMABAGR7A4R4N-VN 128GB DDR4-2666V PC4-21300 2S4Rx4 Server Memory ModuleAvailability: Available by QuoteManufacturer: Hynix Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Hynix HMABAGL7A4R4N-VN 128GB 2S4Rx4 PC4-2666V-L DIMMAvailability: Available by QuoteManufacturer: Hynix Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Intel NMB1XXD128GPS Optane 128GB DDR4-3200 (PC4-25600) Persistent Memory ModuleAvailability: Available by QuoteManufacturer: Intel Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- HPE P03055-091 128GB 8Rx4 DDR4L-2933 PC4L-23400 ECC Server Memory ModuleAvailability: Available by QuoteManufacturer: HPE Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- HPE P11057-6A1 128GB 4Rx4 DDR4L-2933 PC4L-23400 ECC Server Memory ModuleAvailability: Available by QuoteManufacturer: HPE Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
Choosing DDR4 Server Memory: RDIMM vs LRDIMM
| Type | Capacity per DIMM | Max per 2-socket server | Performance | Best For |
|---|---|---|---|---|
| DDR4 RDIMM | 8GB–64GB | Up to 1.5TB (24 slots x 64GB) | Standard — no latency penalty | Most virtualization, database, and general workloads |
| DDR4 LRDIMM | 64GB–128GB+ | Up to 3TB+ (24 slots x 128GB) | Slightly higher latency vs RDIMM | In-memory databases, maximum-density VM hosts |
For most VMware vSphere, Hyper-V, and database deployments, DDR4 RDIMMs at 32GB or 64GB per DIMM provide the right balance of capacity and cost. LRDIMMs are worth the price premium when you need to maximize total system memory — for example, when running SAP HANA, Microsoft SQL Server with large in-memory tables, or very high VM densities.
- Is DDR4 memory compatible with 16th gen Dell PowerEdge servers?
- No. Dell PowerEdge 16th generation servers (R660, R760, R760xs) use DDR5 memory exclusively. DDR4 is compatible with 14th gen (R640, R740, R740xd) and 15th gen (R650, R750) servers. Browse DDR5 memory for 16th gen platforms.
- What speeds does DDR4 server memory run at?
- DDR4 server memory runs at 2133, 2400, 2666, or 3200 MT/s depending on the processor generation. 14th gen Intel Xeon Scalable supports DDR4-2666; 15th gen (Ice Lake-SP) supports DDR4-3200. Higher-speed DIMMs are backward compatible and will run at the maximum speed supported by the processor.
