We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two green DDR4 DIMM sticks, black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM2048722400ECCR 32GB (2x16GB) DDR4 2400 ECC Registered DIMM memory upgrade

SKU CH-5RC2-QH8G1

32 GB dual-channel DDR4 kit with two 16 GB registered ECC DIMMs rated at 2400 MHz CL17 for the HP Z640 workstation

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 32 GB total capacity from a matched 2 × 16 GB kit
  • ECC registered operation protects data integrity in server workloads
  • DDR4 2400 MHz speed rated at PC4-19200 for high throughput
  • Guaranteed compatibility with HP Workstation Z640 memory architecture
  • Low 1.2 V voltage reduces power draw and heat

System-specific DDR4 upgrade

This 32 GB kit contains two 16 GB registered DIMMs built for the HP Z640 workstation. Each module runs at 2400 MHz with CL17 timings at 1.2 V and includes ECC error correction. The registered design suits server-class motherboards that require buffered memory.

Thermals and power in use

Operating at the standard 1.2 V DDR4 voltage keeps power draw low and heat output minimal. No heat spreader is fitted, so airflow across the bare PCB is sufficient for typical workstation loads. Registered buffers add negligible latency while maintaining signal integrity across all populated slots.

Registered ECC requirement

The motherboard must accept registered ECC DDR4 DIMMs; consumer unbuffered or non-ECC modules will not work. Maximum supported capacity is 256 GB, and actual clock speed depends on the installed processor — some CPUs limit the bus to 1866 MHz. Buyers needing unbuffered memory or higher frequencies should choose a different product.

How it compares

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

Price $96.99
Cheaper than about 68% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $3.03 per GB
Cheaper than about 90% 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 nameComputer Memory Solutions
Model nameCM2048722400ECCR
Total capacity32 GB (2 × 16 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL17
Memory timings17-17-17
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHp/Compaq Workstation Z640
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 288-pin DDR4 DIMMs in the HP Z640 and which slot do people often miss?

Populate the white DIMM slots first — one per channel — as shown in the Z640 service guide; the white slots mark the first slot of each channel and are the ones installers most often skip.

What maintenance or replacement will this registered ECC kit need over time?

No periodic maintenance is required; the modules carry a limited lifetime warranty from Computer Memory Solutions, so replacement would only occur if a stick fails.

What speed limit appears first under sustained load with a 1866 MHz-capable processor?

The memory will clock down to 1866 MHz when the installed processor only supports that speed, regardless of the 2400 MHz rating.

More in Model-Specific Memory Upgrades

Similar items