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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM1024642666DIMM 8GB DDR4 2666MHz CL19 2Rx8 1.2V memory upgrade

SKU CH-CJFS-R1P30

An 8 GB DDR4-2666 DIMM built for Dell OptiPlex XE3 SFF and XPS 8930 desktops

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 8GB capacity expands system memory for Dell OptiPlex XE3 SFF and XPS 8930
  • DDR4 2666MHz speed matches PC4-21300 specification for responsive performance
  • CL19 CAS latency with 19-19-19 timing delivers stable operation
  • 2V low voltage reduces power draw without heat spreader
  • 288-pin unbuffered non-ECC DIMM fits four available sockets up to 64GB

Compatible Dell Desktop Upgrade

This 8GB DDR4 module is built for Dell OptiPlex XE3 Small Form Factor and XPS 8930 Desktop systems. It targets owners of those specific machines who need a straightforward capacity increase without compatibility guesswork.

Single Stick For Four Slot Boards

The DIMM uses the standard 288-pin DDR4 interface and runs at 1.2V unbuffered, so it drops into any of the four memory sockets on the supported platforms. Adding one stick leaves three slots open for future expansion up to the 64GB system maximum.

Steady Operation At CL19

Rated at 2666MHz with 19-19-19 timings and a 2Rx8 organisation, the module delivers consistent throughput during extended workloads. All installed memory will operate at the slowest module or processor limit, so matching pairs are recommended for peak bandwidth.

How it compares

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

Price $38.99
Cheaper than about 81% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.87 per GB
Cheaper than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM1024642666DIMM
Total capacity8 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 items1 Memory RAM Stick

Questions about this item

Will the CL19 timing limit bandwidth when the XPS 8930 runs memory-intensive workloads for hours?

The module operates at DDR4 2666 with CL19 19-19-19 timings; sustained throughput is capped by that latency figure and the CPU's memory controller.

Does the unbuffered 1.2 V design add noticeable heat or fan noise inside a Dell OptiPlex XE3 SFF during all-day operation?

At 1.20 V with no heat spreader the sticks run cool; the SFF chassis fans typically stay at idle speed even under continuous load.

Must the OptiPlex XE3 SFF or XPS 8930 already have a 64-bit OS installed for this 8 GB DIMM to be recognised?

Yes — a 64-bit operating system is required to address more than 4 GB, so the full 8 GB capacity will only be usable with one already present.

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