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Green rectangular DDR4 RDIMM module with gold edge connector and black chips on both sides

OWC

OWC 16GB DDR4 2933MHz ECC Registered RDIMM 2Rx8 CL21 1.2V 288-pin for ThinkStation P520 P520c

SKU CH-HYTS-AQSJ8

16GB DDR4-2933 ECC registered RDIMM for Lenovo ThinkStation P520 and P520c workstations

  • Total capacity16 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 16GB

  • ECC registered design protects data integrity in critical workloads
  • 16 GB capacity expands multitasking headroom for demanding applications
  • 2933 MHz DDR4 speed delivers responsive performance for workstation tasks
  • 288-pin RDIMM form factor fits ThinkStation P520 and P520c slots
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment

ECC Registered Memory for ThinkStation P520

This 16GB DDR4 2933MHz module is built for Lenovo ThinkStation P520 and P520c workstations. It uses a 288-pin RDIMM form factor with ECC and registered buffering. The CL21 latency and 1.2V voltage match the platform requirements. It replaces Lenovo part numbers 01AG631, 4ZC7A08708 and 4ZC7A08741.

Registered ECC Changes Compatibility

The registered ECC design means this DIMM works only in servers and workstations that support registered memory. It will not function in standard desktop computers. It also cannot be mixed with unbuffered modules in the same system. Backward compatibility covers 2133MHz, 2400MHz and 2666MHz speeds.

Suited for Workstation Upgrades Not Desktops

This module suits IT managers extending the life of ThinkStation P520 or P520c systems. It also fits new server or NAS builds that require registered ECC DDR4. Buyers with consumer motherboards or laptops should look elsewhere, as the registered design prevents installation and operation on those platforms.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $114.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.19 per GB
Cheaper than about 56% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo ThinkStation P520
Lenovo ThinkStation P520c

Other versions of this model

5 more in the same range

Questions about this item

Will the 2Rx8 registered ECC modules need any firmware updates or periodic replacement in a ThinkStation P520?

The 16 GB DDR4 2933 MHz CL21 1.2 V RDIMM has no moving parts and requires no firmware updates or scheduled replacement; ECC correction runs continuously while the workstation is powered on.

What sustained workload limit appears first — thermal throttling or voltage regulation — when the DIMM runs at 2933 MHz all day?

The module operates at the standard 1.2 V JEDEC voltage with no heat spreader, so thermal limits of the chassis airflow are reached before any on-DIMM voltage-regulation ceiling.

How much extra power draw and fan noise should I expect from a 16 GB 2Rx8 RDIMM running 24/7 in a P520c?

At 1.2 V the stick adds only a few watts to the memory subsystem; the registered buffer draws slightly more current than unbuffered DIMMs, but the increase is small enough that system fan curves typically do not change.

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