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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

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Timing19-19-19
  • Voltage1.2V
  • 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.

Highlights

  • 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

Specifications

BrandComputer Memory Solutions
ModelCM4096642666DIMM
Capacity64GB (2 x 32GB)
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Timing19-19-19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemASUS/Asmobile Motherboard PRIME Z390-A/H10, Z390-P, Z390M-PLUS, Z490-A, Z490-P, Z490-V
Package Content2 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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