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Four green DDR4 DIMM sticks, no heat spreaders, 288 pins

Computer Memory Solutions

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

SKU CH-JG8E-4RK64

64GB DDR4 kit with four 16GB DIMMs at 2666MHz CL19 for Dell OptiPlex XE3 SFF and XPS 8930 desktops

  • 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 for responsive multitasking
  • CL19 CAS latency with 19-19-19 timing
  • 20 V low-voltage operation reduces power draw
  • Validated for Dell OptiPlex XE3 SFF and XPS 8930

What this kit upgrades

This 64 GB kit consists of four 16 GB DDR4 DIMMs rated at 2666 MHz with CL19 timing. It is built for Dell OptiPlex XE3 Small Form Factor and XPS 8930 Desktop systems that use 288‑pin unbuffered non‑ECC memory.

Capacity and headroom

The four modules fill all four sockets and reach the platform’s 64 GB maximum. Everyday multitasking, large spreadsheets and virtual machines run comfortably; workloads that need more than 64 GB or faster transfer rates will hit the ceiling of this configuration.

What the bundle changes

Installing the matched quad‑channel set lets the memory controller run at its rated 2666 MHz instead of down‑clocking to the slowest module. A 64‑bit operating system is required to address the full 64 GB.

How it compares

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

Price $445.99
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 $6.97 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 systemsDell OptiPlex OptiPlex XE3 Small Form Factor (SFF), XPS 8930 Desktop
In the box
Included items4 Memory RAM Sticks

Questions about this item

Will the 2666MHz DDR4 modules downclock to match my existing slower DDR4 sticks in the Dell XPS 8930?

Yes, all memory in the system will run at the slowest performance of the installed modules or the CPU capability, so faster sticks automatically downclock to match older ones.

How can I verify the 64GB kit is running at the correct 2666MHz CL19 speed after installation?

Check the memory speed and timings in the BIOS or use a tool like CPU-Z; the kit should show 2666MHz with 19-19-19 timings at 1.2V when operating as intended.

Does the package contain only the four 16GB DIMMs or are any tools or cables included for the OptiPlex XE3 SFF install?

The box includes the four 288-pin DDR4 memory sticks only; no tools, cables or additional hardware are supplied for the installation.

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