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
Four green DDR4 DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 64GB (4x16GB) DDR4 2666MHz CL19 1.2V DIMM memory upgrade

SKU CH-SNJX-7TPKC

A 64 GB kit of four 16 GB DDR4 2666 MHz CL19 unbuffered DIMMs validated for Supermicro SuperWorkstation 5039C-T and X11SCA series motherboards

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 64 GB total capacity from four 16 GB modules
  • DDR4 2666 MHz speed rated at PC4 21300
  • CL19 latency with 19-19-19 timing for responsive operation
  • 2 V low voltage reduces power draw and heat
  • Validated for Supermicro SuperWorkstation 5039C-T and X11SCA series motherboards

System-Specific 64GB DDR4 Kit

This 64GB kit contains four 16GB unbuffered DIMMs built for the Supermicro SuperWorkstation 5039C-T and X11SCA-series motherboards. It is intended for professionals who need guaranteed compatibility without manual configuration.

2666MHz CL19 Capacity and Limits

The modules run at 2666MHz with CL19 timings and 1.2V, filling all four sockets to reach the platform's 128GB maximum. Performance scales to the slowest installed module or CPU capability, so mixing with slower sticks reduces speed.

288-Pin Unbuffered Build

Each stick uses a 288-pin DDR4 PCB without a heat spreader, relying on chassis airflow for cooling. The non-ECC, 2Rx8 layout suits workstation workloads that do not require error correction, and matched-pair installation is recommended for stability.

How it compares

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

Price $451.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $7.06 per GB
Cheaper than about 57% 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 nameCM2048642666DIMM
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro SuperWorkstation 5039C-T (Super X11SCA), X11SCA, X11SCA-F, X11SCA-W Motherboard
In the box
Included items4 Memory RAM Sticks

Questions about this item

Will the 2666MHz CL19 modules down-clock to match older DDR4 sticks I keep in the Supermicro X11SCA motherboard?

Yes, all installed memory runs at the speed of the slowest module or the CPU limit, so older DDR4 DIMMs will set the operating frequency.

How can I confirm the 64GB kit is running at 2666MHz with CL19 timings after installation?

Check the BIOS memory information or a tool such as CPU-Z; it should report 2666MHz, 19-19-19 timings and 1.2V across all four slots.

Does the package contain only the four 16GB DIMMs or are heat spreaders and cables included?

The box holds four 288-pin DDR4 DIMMs; no heat spreaders, cables or extra accessories are supplied.

More in Model-Specific Memory Upgrades

Similar items