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Green bare circuit board DDR4 RDIMM with black chips and gold contacts

OWC

OWC 32GB DDR4 3200MHz CL22 1.2V 288pin ECC Registered RDIMM Memory Upgrade

SKU CH-KV60-61DZC

32 GB DDR4 3200 MHz ECC registered RDIMM for Lenovo ThinkSystem SR635, SR655, SR850 and SR860 servers

  • Total capacity32 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 32GB

  • 32 GB capacity expands server memory for demanding workloads
  • DDR4 3200 MHz speed delivers high data throughput for Lenovo ThinkSystem servers
  • CL22 latency and 1.2 V voltage balance responsive performance with efficient power use
  • ECC registered design detects and corrects errors to protect data integrity in critical applications
  • Validated for ThinkSystem SR635, SR655, SR850 and SR860 ensuring reliable compatibility

32GB DDR4 ECC RDIMM for Lenovo ThinkSystem

This 32GB DDR4 3200MHz CL22 registered DIMM is built for Lenovo ThinkSystem SR635, SR655, SR850 and SR860 servers. It delivers error-correcting, buffered memory for workloads that demand data integrity and sustained uptime.

Replaces Lenovo 4ZC7A15122 in Xeon SP Gen 2 servers

The module matches the original Lenovo part number 4ZC7A15122, so it fits directly into the listed ThinkSystem platforms. The upgrade is worth it when your current configuration hits memory limits or when you are populating empty slots to increase total capacity.

Verify registered ECC support and slot availability

Confirm your system requires registered ECC RDIMMs and cannot accept unbuffered memory, as mixing types is not supported. Check that the motherboard has free 288-pin DDR4 slots and that all installed DIMMs share the same capacity, speed and rank configuration for optimal operation.

How it compares

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

Price $204.99
Cheaper than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $6.41 per GB
Cheaper than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R432 GB
Total capacity32 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo ThinkSystem SR635
Lenovo ThinkSystem SR655
Lenovo ThinkSystem SR850 (Xeon SP Gen 2)
Lenovo ThinkSystem SR860 (Xeon SP Gen 2)

Other versions of this model

5 more in the same range

Questions about this item

Will the 288-pin DDR4 RDIMM fit the DIMM slots in a Lenovo ThinkSystem SR635?

Yes, the 288-pin DDR4 3200 RDIMM matches the slot keying used in the ThinkSystem SR635, SR655, SR850 (Xeon SP Gen 2) and SR860 (Xeon SP Gen 2) servers listed for this module.

What is the correct way to seat this registered ECC module so the server recognises all 32 GB?

Align the notch on the 288-pin edge connector with the slot key, press straight down until both retention clips click shut, then verify in BIOS that the module shows as registered ECC at 3200 MT/s.

When should this 32 GB DDR4 3200 CL22 RDIMM be replaced in a production server?

Replace the module if memory diagnostics report uncorrectable ECC errors, if the system logs repeated corrected-error thresholds, or during a planned capacity upgrade to larger RDIMMs.

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