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Green bare circuit board DDR4 memory module with black chips and gold edge connector

OWC

OWC 16GB DDR4 2666MHz PC4-21300 CL19 1.2V 288pin ECC Registered RDIMM for Lenovo ThinkAgile Xeon SP Gen 1

SKU CH-631P-PC82B

16 GB DDR4 2666 MHz ECC registered DIMM for Lenovo ThinkAgile Xeon SP Gen 1 servers

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16GB capacity expands server memory for larger workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666MHz speed matches Lenovo ThinkAgile Xeon SP Gen 1 specifications
  • 2V low voltage reduces power draw in dense configurations
  • Validated replacement for Lenovo part numbers 01AG618 4X70P98202 7X77A01303

Server Memory Upgrade

This 16GB DDR4 ECC Registered RDIMM is built for Lenovo ThinkAgile servers running Xeon SP Gen 1 processors. It targets administrators who need to expand capacity in HX3521-G, HX3720, HX3721, HX5520 or HX5521 systems. It will not work in standard desktop computers or with unbuffered modules.

Critical Specification

The module is a 288-pin DDR4 2666MHz PC4-21300 CL19 1.2V 2Rx8 Registered DIMM with ECC. That registered buffer and ECC combination is the single factor that decides compatibility; mixing it with unbuffered memory will prevent the system from booting.

Installation Notes

Installation follows the standard DIMM slot procedure for these ThinkAgile models. The most common error is attempting to pair this registered stick with unbuffered memory already present in the server, which causes a memory mismatch halt at POST.

Puntos fuertes

  • 16GB capacity expands server memory for larger workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666MHz speed matches Lenovo ThinkAgile Xeon SP Gen 1 specifications
  • 2V low voltage reduces power draw in dense configurations
  • Validated replacement for Lenovo part numbers 01AG618 4X70P98202 7X77A01303

Especificaciones

BrandOWC
Part Number2R6D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkAgile (Xeon SP Gen 1) HX3521-G
Lenovo ThinkAgile (Xeon SP Gen 1) HX3720
Lenovo ThinkAgile (Xeon SP Gen 1) HX3721
Lenovo ThinkAgile (Xeon SP Gen 1) HX5520
Lenovo ThinkAgile (Xeon SP Gen 1) HX5521

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Preguntas sobre este artículo

Will the 2666 MHz speed run at that rate in my ThinkAgile HX3521-G?

Yes, the module is rated PC4-21300 2666 MHz CL19 and the ThinkAgile HX3521-G supports DDR4-2666, so it will operate at the full rated speed.

Does the ECC registered DDR4 interface limit mixing with other DIMM types?

ECC registered DDR4 cannot be mixed with unbuffered non-ECC DIMMs; all slots must use registered ECC modules for the system to function correctly.

Does the 288-pin registered form factor fit the ThinkAgile HX5520 memory slots?

The 288-pin DDR4 RDIMM matches the slot keying on the ThinkAgile HX5520 and HX5521, so it installs directly without adapters.

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