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Two green DDR4 DIMM sticks, no heat spreaders, 288-pin

Computer Memory Solutions

Computer Memory Solutions CM4096642666DIMM 64GB (2x32GB) DDR4 2666MHz CL19 1.2V 288-pin DIMM memory upgrade

SKU CH-Q2XJ-RXGRK

64GB dual-channel DDR4 kit at 2666MHz CL19 validated for ASUS Prime Z390 and Z490 motherboards

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 64 GB total capacity in a matched 2 x 32 GB kit
  • DDR4 2666 MHz speed rated at PC4 21300 for responsive throughput
  • CL19 19-19-19 timing at 1.2 V for stable low-voltage operation
  • Unbuffered non-ECC 288-pin DIMMs built with major-brand 2Rx8 chips
  • Tested compatible with ASUS Prime Z390 and Z490 motherboards

Capacity and kit layout

This kit provides 64GB of DDR4 memory in a matched pair of two 32GB modules. It is built for owners of the listed ASUS Prime Z390 and Z490 motherboards who need the full 64GB capacity in a dual-channel configuration. The unbuffered, non-ECC design suits standard desktop workloads and gaming rigs.

Physical build and daily use

Each stick is a 288-pin DIMM without a heat spreader, so it fits into tight slots and under large CPU coolers without clearance issues. The modules operate at the standard 1.2V, keeping power draw low and installation straightforward on the four supported motherboard sockets. Mixing with other kits will force all memory to run at the slowest installed speed.

Deciding specification

The rated speed is DDR4 2666 (PC4 21300) with CL19 19-19-19 timings at 1.2V. If your CPU or motherboard cannot run at 2666MT/s, the kit will downclock automatically, but it will not reach higher data rates. Buyers who need faster JEDEC speeds or lower latencies should look elsewhere.

How it compares

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

Price $276.99
Cheaper than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $4.33 per GB
Cheaper than about 82% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM4096642666DIMM
Total capacity64 GB (2 × 32 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 systemsASUS/Asmobile Motherboard PRIME Z390-A/H10, Z390-P, Z390M-PLUS, Z490-A, Z490-P, Z490-V
In the box
Included items2 Memory RAM Sticks

Questions about this item

What speed does the DDR4 2666MHz interface actually deliver in practice?

The modules run at DDR4 2666 (PC4 21300) with CL19 19-19-19 timings at 1.2V; all installed memory will operate at the slowest module or CPU capability.

What physical clearance and slot layout does this 288-pin DIMM kit require?

Two unbuffered 288-pin DIMMs, each 32GB 2Rx8 without heat spreaders, fit the four slots on the listed ASUS PRIME Z390 and Z490 boards.

How do I install the pair correctly and which step is commonly missed?

Insert both sticks into matching-coloured slots for dual-channel operation; a 64-bit OS is needed to address more than 4GB.

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