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Green Lenovo 8 GB DDR4 registered DIMM module with gold contacts

Lenovo

Lenovo 46W0821 8 GB DDR4-2400 CL17 Registered DIMM memory upgrade

SKU CH-NZ2F-AX43M MPN 46W0821

8 GB DDR4-2400 CL17 registered DIMM for Lenovo System x3650 M5 servers

  • Rated speedDDR4 SDRAM
  • CAS latencyCL17
  • Buffer typeRegistered
  • Compatible systemsLenovo
  • 8 GB DDR4-2400 capacity for Lenovo x3650 M5 servers
  • Registered signal processing improves stability in multi-DIMM configurations
  • CL17 CAS latency at 2400 MHz speed rating
  • 20 V DDR4 voltage reduces power draw
  • 288-pin DIMM form factor fits approved Lenovo slots

8 GB DDR4-2400 registered DIMM

This Lenovo 46W0821 module is an 8 GB DDR4-2400 registered DIMM built for compatible Lenovo servers. It operates at 1.20 V with CAS latency CL17 and uses a 288-pin form factor. The registered signal processing helps maintain stability in multi-DIMM configurations.

Suits x3650 M5 upgrades; not for unbuffered boards

The module is qualified for the Lenovo System x3650 M5 server and matches its registered memory requirement. Builders populating other platforms that expect unbuffered DDR4 should select a different part. Systems needing higher capacities or speeds than 8 GB at 2400 MHz will also require alternative modules.

Registered DDR4 signal processing

Registered signal processing is the single specification that decides fitment; the motherboard must support registered DIMMs for this module to function. Unbuffered-only boards will not accept it, regardless of speed or capacity matching.

How it compares

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

Price $162.99
Cheaper than about 60% of the 21,161 comparable items (median $397.99).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameLenovo
Model name46W0821
Performance
Rated speedDDR4 SDRAM
Memory
CAS latencyCL17
Buffer typeRegistered
Size & build
Shipping weight0.03 kg
Package size25 × 25 × 25 mm
Compatibility
Compatible systemsLenovo

Questions about this item

How much heat and power should I expect from an 8 GB DDR4-2400 CL17 registered DIMM running continuously in a server?

The module operates at 1.20 V with a CL17 latency at 2400 MHz. Registered buffering reduces electrical load on the memory controller, helping keep power draw and heat lower than unbuffered equivalents during 24/7 workloads.

What must my Lenovo System x3650 M5 already have to accept this 288-pin DDR4-2400 registered DIMM?

Your server needs free DDR4 DIMM slots that support registered memory and the DDR4-2400/PC4-19200 standard. The motherboard and BIOS must also be configured for registered (RDIMM) operation; unbuffered-only platforms will not recognise the module.

Will this 2400 MHz registered DIMM run at full speed alongside slower DDR4 modules already installed in my x3650 M5?

When mixed with slower DDR4 DIMMs, the memory controller will downclock all modules to the lowest common speed. The CL17 timing on this stick will still apply at the reduced frequency, so stability is maintained but peak bandwidth drops to the slower module's rating.

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