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Green 288-pin DDR5 RDIMM module with black chips and silver label

HPE

HPE P43322-K21 16GB DDR5 4800 RDIMM CL40 server RAM

SKU CH-E0VS-F6EJ5 MPN P43322-K21

16 GB DDR5-4800 registered ECC RDIMM with CL40 timing and 1.1 V operation

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Memory timings40-39-39
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 16 GB capacity supports demanding server workloads
  • DDR5 4800 speed delivers high data throughput
  • Registered design improves signal integrity
  • CL40 latency with 40-39-39 timing optimises response
  • 10 V operation reduces power consumption

16 GB DDR5 RDIMM for servers

This HPE 16 GB registered DDR5 module runs at 4800 MT/s with CL40 timings and 1.10 V operation. The 288-pin RDIMM form factor and single-rank 1Rx8 organisation target enterprise platforms that require registered memory with Smart Memory features.

Suited for registered DDR5 slots only

Systems that accept registered DDR5 RDIMMs at 4800 MT/s can use this kit; builds needing unbuffered UDIMM modules, a different speed grade, or higher capacities per DIMM should select an alternative part.

Registered DDR5 RDIMM with CL40 latency

The registered buffer and CL40 CAS latency define compatibility with qualified HPE server platforms; verify that your system supports registered DDR5 at this timing before purchase.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,045.99
Pricier than about 81% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $65.37 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameHPE
Model nameP43322-K21
Total capacity16 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
Memory timings40-39-39
Buffer typeRegistered
Memory rank1Rx8
Power
Rated voltage1.1 V
Size & build
Shipping weight0.91 kg
Package size178 × 127 × 76 mm

Questions about this item

What power draw and heat output should I expect from this 1.10V DDR5 4800 module running continuously?

The module operates at 1.10V, the standard voltage for DDR5 4800, keeping power draw and heat low enough for dense server configurations with sustained workloads.

Does my server need a 288-pin DDR5 RDIMM slot and registered-memory support to use this P43322-K21 kit?

Yes, the module is a 288-pin DDR5 RDIMM with registered buffering, so the motherboard must provide DDR5 RDIMM slots and a memory controller that supports registered DIMMs.

Can this 1Rx8 CL40 module be mixed with other DDR5 RDIMMs of different ranks or speeds already in the system?

Mixing is possible if all modules are DDR5 RDIMMs, but the system will run at the lowest common speed and timings; matching rank and CL40 timing avoids down-clocking.

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