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Green printed circuit board with black memory chips, gold edge connector, no heat spreader

OWC

OWC 16GB DDR4 2666MHz ECC Registered RDIMM 2Rx8 CL19 1.2V 288pin Lenovo ThinkAgile HX memory upgrade

SKU CH-X89B-CDAH4

16 GB DDR4 2666 MHz ECC registered RDIMM for Lenovo ThinkAgile HX servers

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • ECC registered design protects data integrity in servers
  • 16GB DDR4 2666MHz CL19 adds responsive capacity
  • 2V operation reduces power draw per module
  • Validated for Lenovo ThinkAgile HX1520-R HX1521-R HX2320-E HX2720-E
  • Replaces Lenovo part numbers 01AG618 4X70P98202 7X77A01303

Targeted Server Upgrade

This 16GB DDR4 ECC Registered RDIMM is built for Lenovo ThinkAgile HX1520-R, HX1521-R, HX2320-E and HX2720-E servers. It replaces Lenovo part numbers 01AG618, 4X70P98202 and 7X77A01303. The module suits administrators who need to expand memory capacity in these specific platforms. It is not for desktop PCs or consumer laptops that require unbuffered non-ECC memory.

DDR4 2666MHz Registered Limits

The module runs at 2666MHz with CL19 latency at 1.2V and is backward compatible with 2133MHz and 2400MHz bus speeds. Registered ECC architecture adds a clock cycle for command buffering, so it cannot be mixed with unbuffered DIMMs in the same channel. Systems must support registered ECC DDR4; standard desktop chipsets will not recognise the module.

Simple Slot Installation

Installation follows the standard 288-pin DIMM procedure: align the notch, press firmly until the latches click, and verify population order in the server service guide. The most common issue is inserting registered ECC memory into a board that only accepts unbuffered DIMMs, which prevents boot. Another frequent error is mixing this 2Rx8 module with different rank configurations in the same channel.

Highlights

  • ECC registered design protects data integrity in servers
  • 16GB DDR4 2666MHz CL19 adds responsive capacity
  • 2V operation reduces power draw per module
  • Validated for Lenovo ThinkAgile HX1520-R HX1521-R HX2320-E HX2720-E
  • Replaces Lenovo part numbers 01AG618 4X70P98202 7X77A01303

Specifications

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 HX1520-R
Lenovo ThinkAgile HX1521-R
Lenovo ThinkAgile HX2320-E
Lenovo ThinkAgile HX2720-E

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Questions about this item

Should I pick the 16GB 2Rx8 module or a different capacity for my ThinkAgile HX server?

The 16GB 2Rx8 RDIMM matches Lenovo part numbers 01AG618, 4X70P98202 and 7X77A01303. Use identical modules per channel for best performance.

What does the 2666MHz rating deliver inside a ThinkAgile HX1520-R?

It runs at DDR4-2666 CL19 1.2V with ECC registered operation. The module also down-clocks to 2400MHz or 2133MHz if the platform requires it.

Is the PC4-21300 288-pin RDIMM interface compatible with standard desktop memory slots?

No. This is an ECC registered DDR4 RDIMM for servers and workstations only. It cannot be mixed with unbuffered desktop DIMMs.

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