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Green circuit board with black memory chips and gold edge connector

Kingston Technology Corp.

Kingston Technology Corp. KTH-PL421E/8G 8GB DDR4 2133 ECC memory upgrade

SKU CH-M1S1-EV4B9 MPN KTH-PL421E/8G

8GB DDR4 2133 ECC module tested to JEDEC for HP/Compaq systems 805669-B21 and T0E51AA

  • Total capacity8 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • Product type288-Pin DDR4 SDRAM
  • Compatible systemsHP/Compaq: 805669-B21, T0E51AA
  • Key featuresDesigned and Tested to meet JEDEC Free Technical Support
  • ECC protects data integrity in critical workloads
  • DDR4 2133 speed delivers responsive system performance
  • 8GB capacity expands memory for demanding applications
  • 288-pin DDR4 form factor fits compatible HP/Compaq systems
  • JEDEC-tested design ensures reliable compatibility and operation

System-Specific DDR4 Module

This 8 GB DDR4 module is built for HP and Compaq systems identified by part numbers 805669-B21 and T0E51AA. It delivers 2133 MT/s performance with ECC support for data integrity in compatible workstations or servers. The 288-pin form factor matches the memory slots in those qualified platforms.

Thermals Noise Power

No heat spreader is fitted, so the module relies on case airflow for cooling during normal operation. As a standard DDR4 DIMM it draws typical low voltage power without active cooling noise. ECC circuitry adds minimal overhead while providing error detection and correction.

Upgrade Context

This module replaces or expands memory in the listed HP and Compaq systems when ECC DDR4 2133 is required. It is not suited for consumer desktops or laptops that use non-ECC SODIMMs or different DDR generations. Buyers needing higher capacities or speeds beyond 2133 MT/s should verify platform support before purchasing.

How it compares

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

Price $74.99
Cheaper than about 71% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $9.37 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameKingston
Model nameKTH-PL421E/8G
Total capacity8 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
ECC supportYes
Heat spreaderNo
Size & build
Shipping weight0.45 kg
Package size152 × 51 × 25 mm
Compatibility
Compatible systemsHP/Compaq: 805669-B21, T0E51AA

Questions about this item

How do I install the 288-Pin DDR4 module in my HP 805669-B21 system, and what step is often missed?

Power off the server, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until the retention clips click, then verify the BIOS recognises the full 8 GB capacity.

What maintenance or replacement will this ECC DDR4 memory need over time?

No scheduled maintenance is required; replace the module only if memory diagnostics report correctable ECC errors that exceed the platform threshold or if a DIMM fails POST.

What limit appears first when this DDR4 2133 memory runs under sustained load?

The JEDEC-rated DDR4 2133 speed and the absence of a heat spreader mean thermal throttling or bandwidth saturation will occur before any higher frequency ceiling.

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