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
Single green 288-pin DDR4 RDIMM module, 64GB capacity, black chips on both sides

A-Tech

A-Tech 64GB DDR4 2666 ECC RDIMM 2S2Rx4 3DS/TSV server RAM

SKU CH-KWHG-466GC

64 GB DDR4 2666 ECC RDIMM module with CL19 latency, 1.20 V operation and 288-pin registered design for server workloads

  • Capacity64GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • 64GB capacity handles heavy virtualization workloads
  • DDR4 2666 MHz PC4-21300 speed accelerates data throughput
  • ECC RDIMM registered design protects data integrity
  • 2V standard voltage reduces power consumption
  • 288-pin 2S2Rx4 3DS/TSV architecture enables high-density scaling

64GB DDR4 2666 ECC RDIMM Server Module

This A-Tech module delivers 64GB of DDR4 2666MHz registered ECC memory in a single 288-pin DIMM. It uses a 2S2Rx4 3DS/TSV organisation and operates at the standard 1.20V. The part is designed as a compatible replacement for the IBM-Lenovo 78P4199 and targets server or workstation platforms that require registered error-correcting memory.

Verify Platform Support for Registered ECC 3DS

Before ordering, confirm that your motherboard and processor support DDR4 registered DIMMs with ECC and the 3DS/TSV rank architecture used here. Some consumer or entry-level workstation boards accept only unbuffered non-ECC memory and will not post with this module. Check the system manual or vendor memory-qualified list for the exact 64GB registered configuration.

Sustained Workload Stability at Standard Voltage

Under continuous load the module runs at the JEDEC 1.20V level with CL19 latency, keeping power draw predictable during long compute or virtualisation sessions. The registered buffer and on-die ECC maintain data integrity across extended duty cycles without relying on elevated voltages or aggressive timing profiles.

Highlights

  • 64GB capacity handles heavy virtualization workloads
  • DDR4 2666 MHz PC4-21300 speed accelerates data throughput
  • ECC RDIMM registered design protects data integrity
  • 2V standard voltage reduces power consumption
  • 288-pin 2S2Rx4 3DS/TSV architecture enables high-density scaling

Specifications

BrandA-Tech
Capacity64GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank2S2Rx4 (4Rx4 3DS/TSV)
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

Questions about this item

What comes in the box and do I need any extra parts to install this module?

The box contains one 64GB DDR4 2666 CL19 1.20V ECC RDIMM 288-pin 2S2Rx4 3DS/TSV module; no extra parts are required for installation.

Why choose the 64GB 2S2Rx4 3DS/TSV version instead of a lower-capacity or single-rank module?

This 64GB module uses 3DS/TSV stacking to deliver four logical ranks in a single DIMM slot, letting you reach higher total memory without filling every slot.

What does the 2666 MHz speed mean for real-world server workloads?

At 2666 MT/s the module runs at the standard DDR4 2666 data rate, providing the bandwidth your platform specifies for that speed grade.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.