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
Green rectangular DDR4 DIMM with black chips and gold contacts

DELL

DELL AA138422 16GB DDR4 2666MHz ECC Registered Server RAM

SKU CH-VFCZ-VK316 MPN AA138422

16 GB DDR4 ECC registered DIMM at 2666 MHz with CL19 latency for compatible Dell PowerEdge and Precision rack systems

  • Rated speedDDR4 SDRAM
  • ECC supportECC
  • Buffer typeRegistered
  • Product type288-Pin DDR4 SDRAM
  • 16 GB capacity expands server memory for larger workloads
  • ECC registered design detects and corrects single-bit errors automatically
  • 2666 MHz DDR4 speed matches PC4-21300 standard for compatible platforms
  • CL19 CAS latency at 1.20 V balances responsiveness with power efficiency
  • 288-pin DIMM form factor fits listed PowerEdge and Precision rack models

Dell 16GB DDR4-2666 ECC Registered DIMM

This Dell AA138422 module provides 16GB of DDR4 SDRAM operating at 2666MHz with a CAS latency of CL19. It uses a 288-pin DIMM form factor and runs at 1.20V. Error Checking and Correction (ECC) combined with registered signal processing protects data integrity in server and workstation environments. The single-rank stick is validated for Dell PowerEdge and Precision Rack systems.

Stability under sustained server workloads

Registered buffering reduces electrical load on the memory controller, allowing the module to maintain consistent throughput during extended multi-threaded tasks. ECC circuitry detects and corrects single-bit errors on the fly, preventing silent data corruption during long compute jobs. The DDR4-2666/PC4-21300 standard delivers steady bandwidth for virtualisation, database and rendering workloads without the voltage spikes seen in unbuffered alternatives.

Installation notes and common issues

The 288-pin keying matches standard DDR4 DIMM slots in compatible Dell PowerEdge C4140, R440, R540, R640, R740, R740XD, R940, T440 and T640 servers plus Precision R7920, T5820, T7820 and T7920 workstations. Mixing registered modules with unbuffered memory will prevent boot, so populate all channels with identical registered parts. Systems limited to lower memory speeds will downclock the module automatically; verify the platform supports DDR4-2666 to use the rated frequency.

How it compares

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

Price $467.99
Pricier than about 70% of the 6,523 comparable items (median $188.99).

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 nameDell
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 SDRAM
Memory
ECC supportECC
Buffer typeRegistered
Size & build
Shipping weight0.45 kg
Package size25 × 25 × 25 mm

Questions about this item

How much power does the 1.20 V DDR4 module draw when the server runs continuously?

At the rated 1.20 V the 16 GB module operates within standard DDR4 power limits; actual draw depends on the platform's memory controller and workload.

Which motherboard slot and chipset features are required for this 288-pin registered ECC DIMM to function?

A DDR4 RDIMM slot with registered-signal and ECC support is needed; the platform must accept PC4-21300 modules at 2666 MHz.

Will this CL19 2666 MHz stick work reliably alongside slower DDR4 modules already installed in a PowerEdge R740?

The module runs at 2666 MHz CL19; the system will clock all populated channels to the slowest installed DIMM's speed and timings.

More in ECC Server RAM

Similar items