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Green printed circuit board DDR2 memory module with black chips and gold edge connectors

Kingston Technology Corp.

Kingston Technology Corp. KVR667D2D4P5/4G 4GB DDR2 667 ECC Registered memory upgrade

SKU CH-H99E-94CDX MPN KVR667D2D4P5/4G

4GB DDR2 667 ECC Registered server memory module with CL5 latency and 1.80V operation

  • Total capacity4 GB
  • Rated speedDDR2 667 (PC2 5300)
  • CAS latencyCL5
  • Rated voltage1.8 V
  • Buffer typeRegistered
  • Key featuresDual Rank
  • ECC Registered design protects data integrity in servers
  • DDR2 667 speed delivers up to 5.3GB/s bandwidth
  • 4GB capacity supports memory-hungry workloads
  • Registered buffering handles high-density configurations
  • CL5 latency at 1.80V for stable operation

Server Memory Upgrade

This 4 GB DDR2 module runs at 667 MHz with CL5 latency and 1.80 V. It is an ECC registered dual-rank DIMM built for server and workstation platforms that require registered memory.

Suited For And Limits

It fits systems designed for PC2 5300 registered ECC modules and 24/7 operation where error correction is mandatory. Buyers whose boards only accept unbuffered non-ECC memory cannot use this part.

Deciding Specification

The registered ECC design with dual-rank organisation is the single factor that decides compatibility; only motherboards that explicitly support registered ECC DDR2 will recognise and run this module.

How it compares

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

Price $84.99
Cheaper than about 69% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $21.25 per GB
Pricier than about 66% of the 20,941 comparable items (median $8.19 per GB).

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 nameKingston
Product lineValueRAM
Model nameKVR667D2D4P5/4G
Total capacity4 GB
Performance
Rated speedDDR2 667 (PC2 5300)
Memory
CAS latencyCL5
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.8 V
Size & build
Shipping weight0.04 kg
Package size169 × 55 × 14 mm

Questions about this item

How do I install the KVR667D2D4P5/4G DDR2 module and which step is often missed?

Align the notch with the DDR2 slot key, press firmly until both retention clips click, then verify the system recognises the full 4 GB capacity — the step most often missed is confirming the registered ECC module is seated in a slot that supports registered memory.

What maintenance or replacement will this 4 GB DDR2 ECC registered module need later?

No routine maintenance is required; the module is solid-state. Replacement is only necessary if a memory test reports uncorrectable ECC errors or the server fails to boot with the module installed.

What limit appears first when this DDR2 667 CL5 1.80 V module runs under sustained load?

The 5.3 GB/s bandwidth ceiling of the PC2 5300 interface is reached before thermal or voltage limits, capping sustained throughput for data-hungry server workloads.

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