16GB DDR4-2666V PC4-21300 1.2V ECC 288-Pin Registered RDIMM Server Memory Module

This 16GB DDR4 ECC Registered (RDIMM) server memory module is built for enterprise/server platforms that require reliable, error-correcting memory. It operates at DDR4-2666 (PC4-2666V / PC4-21300) and is designed for systems with 288-pin RDIMM slots.

Technical Specifications

• Memory Type: DDR4 SDRAM
• Capacity: 16GB
• Module Type: RDIMM (Registered)
• Form Factor: 288-Pin DIMM
• Speed: DDR4-2666 (2666 MT/s)
• Data Rate: PC4-21300 (PC4-2666V)
• Voltage: 1.2V
• Error Correction: ECC (Error-Correcting Code)
• Rank / Data Width: 1Rx4 (x4)
• CAS Latency: CL19 (varies by module revision)

Interchangeable / Replacement Part Numbers

815098-B21, 840757-091, 850880-001, MTA18ASF2G72PZ-2G6, MTA18ASF2G72PZ-2G6D1, MTA18ASF2G72PZ-2G6D1QG, MTA18ASF2G72PZ-2G6D1QK, MTA18ASF2G72PZ-2G6D1RG, M393A2K40BB2-CTD, M393A2K40BB2-CTD6Q, M393A2K40BB2-CTD7Q, M393A2K40CB2-CTD, M393A2K40CB2-CTD7Q, M393A2K40CB2-CTD7Y, M393A2K40CB2-CTD8Q, M393A2K40CB2-CTD8Y, HMA82GR7AFR4N-VK, HMA82GR7CJR4N-VK, HMA82GR7DJR4N-VK, HMA82GR7JJR4N-VK, HMA82GR7JJR4N-WM

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It's essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔ Dell EMC PowerEdge: R240, R340, R440, R540, R640, R740, R740xd, R840, R940, T440, T640, R450, R550, R650, R750, R850, R950, T550, T650
✔ HPE ProLiant: DL160 Gen10, DL360 Gen10, DL380 Gen10, DL560 Gen10, DL580 Gen10, ML110 Gen10, ML350 Gen10
✔ Lenovo ThinkSystem: SR530, SR550, SR570, SR590, SR630, SR650, SR850, SR950
✔ Cisco UCS: C220 M5, C240 M5, B200 M5
✔ Supermicro: X11DPi Series, X11SPi Series (and similar DDR4 RDIMM-capable X11 platforms)
✔ Fujitsu PRIMERGY: RX1330 M5, RX2540 M5, TX1330 M5, TX2550 M5

☑️ Key Features

☑️ 16GB DDR4 ECC Registered (RDIMM) server memory
☑️ PC4-2666V / PC4-21300 performance class
☑️ ECC support for improved data integrity in server workloads
☑️ 288-pin RDIMM form factor for enterprise platforms
☑️ Ideal for virtualization, databases, and general server upgrades

⚙️ Fit Notes

• Designed for RDIMM (Registered) memory slots — not compatible with UDIMM desktop memory slots and not SODIMM (laptop) memory.
• Memory may downclock depending on CPU/motherboard limitations and population rules.