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Green printed circuit board with black memory chips on both sides gold edge connector 288 pins no heat spreader

HP

HP 726722-S21 32GB DDR4 2133 ECC Load Reduced memory upgrade

SKU CH-HXAY-2ER3D MPN 726722-S21

32GB DDR4 2133 ECC Load Reduced 288-pin module for HPE ProLiant Gen9 servers

  • Total capacity32 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Memory timings15-15-15
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • 32 GB capacity expands server memory headroom
  • DDR4 2133 speed delivers PC4 17000 bandwidth
  • ECC load-reduced design protects data integrity
  • CL15 15-15-15 timing optimises latency response
  • 288-pin DDR4 form factor fits HPE ProLiant Gen9 systems

Server-Specific DDR4 Upgrade

The HP 726722-S21 is a 32GB DDR4 2133 memory module built for HPE ProLiant Gen9 servers including BL460c, DL160, DL180 and DL360 models. It delivers ECC Load Reduced operation at 1.20V for data integrity in enterprise environments. This new component targets administrators expanding capacity on qualified platforms.

DDR4 2133 Interface Constraints

The DDR4 2133 (PC4 17000) interface sets the maximum data rate and timing profile for this module. Systems must support Load Reduced DIMMs and the 288-pin form factor to accept it. Mixing with standard Registered or Unbuffered memory is not supported by the platform.

4Rx4 Load Reduced Organisation

The 4Rx4 rank configuration with CL15 15-15-15 timing determines electrical loading on the memory bus. Buyers must verify their specific ProLiant model qualifies for 4Rx4 LRDIMM population rules before purchase. Systems requiring single or dual rank modules cannot use this part.

How it compares

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

Price $472.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $14.78 per GB
Pricier than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameHP
Model name726722-S21
Total capacity32 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
Memory timings15-15-15
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Size & build
Shipping weight0.05 kg
Package size183 × 74 × 13 mm
Compatibility
Compatible systemsDesigned For:
HPE ProLiant BL460c Gen9, BL460c Gen9 Base, BL460c Gen9 Entry, BL460c Gen9 Performance, BL660c Gen9, DL160 Gen9, DL160 Gen9 Base, DL160 Gen9 Entry, DL180 Gen9, DL180 Gen9 Base, DL180 Gen9 Entry, DL360 Gen9, DL360 Gen9 Base, DL360 Gen9 CMS, DL360 Gen9 Entry, DL360 Gen9 Performance, DL380 Gen9, DL380 Gen9 Base, DL380 Gen9 Entry, DL380 Gen9 Performance, DL560 Gen9, DL560 Gen9 Base, DL560 Gen9 Entry, DL560 Gen9 Performance, DL80 Gen9, ML350 Gen9, ML350 Gen9 Base, ML350 Gen9 Entry, ML350 Gen9 Performance, WS460c Gen9 Graphics, WS460c Gen9 Graphics Expansion, XL170r Gen9, XL1

Questions about this item

How do I know whether the 32GB 288-pin DDR4 2133 ECC Load Reduced module is the right capacity for my HPE ProLiant server?

The module provides 32GB in a single 288-pin DDR4 2133 stick. Check your server's maximum memory per slot and total capacity limit in the HPE ProLiant documentation, then match the number of available slots to reach your target.

What does the DDR4 2133 (PC4 17000) speed rating mean for actual throughput in a ProLiant Gen9 system?

DDR4 2133 runs at 2133 MT/s, delivering up to 17000 MB/s theoretical bandwidth per module. Real-world throughput depends on the memory controller, channel population and BIOS settings of the specific ProLiant Gen9 model.

Will the 288-pin DDR4 interface work with my HPE ProLiant BL460c Gen9 or DL360 Gen9 without a BIOS update?

The 288-pin DDR4 form factor is the standard for ProLiant Gen9 servers. Compatibility is determined by the server's qualified vendor list; consult the HPE memory configurator for the exact BL460c Gen9 or DL360 Gen9 configuration.

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