32GB DDR4-2666 PC4-21300 1.2V ECC Registered 2Rx4 288-Pin RDIMM Server RAM Memory Module

This 32GB DDR4 ECC Registered (RDIMM) server memory module is designed for enterprise servers and workstations that support DDR4-2666 (PC4-21300) RDIMM memory. It features ECC for improved data integrity and a 2Rx4 (dual-rank x4) layout commonly required in server-class platforms.

Technical Specifications

• Capacity: 32GB
• Memory Type: DDR4 SDRAM
• Speed: DDR4-2666 (2666 MT/s)
• PC Rating: PC4-21300
• ECC Support: Yes (ECC)
• Module Type: Registered RDIMM (buffered)
• Rank: 2Rx4 (Dual Rank x4)
• Voltage: 1.2V
• CAS Latency: CL19 (common for PC4-2666V)
• Pins: 288-Pin
• Form Factor: RDIMM (full-size desktop/server DIMM)
• JEDEC: JEDEC-compliant (standard DDR4 RDIMM profile)
• Operating Temp (typical spec): 0°C to 85°C
• PCB Height: Standard height

Interchangeable / Replacement Part Numbers

HMA84GR7AFR4N-VK, 4X77A08611, 4X77A08598, 7X77A01304, 850881-001, 840758-091, 840758-191, 15-105081-01, KK9R2, 01DE974

✅ 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 - PowerEdge: C6420, FC830, R440, R540, R640, R740, R740xd, R840, R940, T440, T640
✔ HPE - ProLiant: DL360 Gen10, DL380 Gen10, DL560 Gen10, DL580 Gen10, ML350 Gen10
✔ Lenovo - ThinkSystem: SR530, SR550, SR570, SR630, SR650, SR850
✔ Lenovo - ThinkStation: P520, P720, P920
✔ Cisco - UCS: C220 M5, C240 M5, B200 M5
✔ Fujitsu - PRIMERGY: RX1330 M5, RX2540 M5, TX1330 M5, TX2550 M5
✔ Supermicro: SYS-5019C, SYS-6019P, SYS-1029P Series
✔ ASUS: RS500-E9 Series, RS700-E9 Series, TS500-E9 Series
✔ Huawei - FusionServer: FusionServer Pro 2288H, FusionServer Pro 2298 V5
✔ Inspur: NF5180M5, NF5280M5
✔ Gigabyte: R181-NA0, R281-3C0
✔ Tyan: GT24E-B7106, TN70A-B8026
✔ Quanta: QuantaGrid D52BQ-2U, QuantaGrid D52BV-2U
✔ Intel: Server System R2208WFTZS, Server System R1208WFTYS
✔ Oracle: Oracle Server X7-2, Oracle Server X7-8
✔ NEC: Express5800/R120g-1M, Express5800/R120g-2E
✔ Sugon: I620-G30, I840-G30
✔ Penguin Computing: Relion 280, Relion 290
✔ Boston: Quattro 12256-T, Quattro 1396

☑️ Key Features

• 32GB capacity for virtualization, databases, and dense server workloads
• ECC support helps detect and correct memory errors for improved stability
• Registered RDIMM design for server/workstation memory controllers
• 2Rx4 (dual-rank x4) layout commonly required in enterprise platforms
• JEDEC-compliant DDR4-2666 (PC4-21300) performance

⚙️ Fit Notes

• This is ECC Registered (RDIMM) memory and is not compatible with systems that require UDIMM or DDR4 SODIMM laptop memory.
• Do not mix RDIMM with UDIMM/LRDIMM unless your system documentation explicitly allows it (most do not).
• If installed in a platform that supports ECC RDIMM but has a lower maximum memory speed, the module will typically downclock to the system’s supported speed.