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Two green DDR4 DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions CM4096642666DIMM 64GB (2x32GB) DDR4 2666 memory upgrade

SKU CH-GVAT-9SSY3

64 GB kit of two 32 GB DDR4 DIMMs running at 2666 MHz with CL19 timing for ASUS ROG Strix 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 for demanding workloads using two 32 GB modules
  • DDR4 2666 speed rated at PC4 21300 for fast data throughput
  • CL19 19-19-19 timing at 1.2 V for efficient low-latency operation
  • Unbuffered non-ECC 288-pin DIMM design for standard desktop compatibility
  • Tested compatible with ROG STRIX Z390-H, Z490-A and Z490-E Gaming motherboards

64GB DDR4 2666 kit for ASUS ROG Strix Z390/Z490

This 64GB kit contains two 32GB DDR4 2666 DIMMs validated for ASUS ROG Strix Z390-H Gaming, Z490-A Gaming and Z490-E Gaming motherboards. The modules run at 1.2V with CL19 timings in an unbuffered, non-ECC layout. They install in the board's four 288-pin slots as a matched pair.

Builders expanding to 64GB on supported boards

The kit suits users whose Z390 or Z490 Strix board has free slots and a 64-bit OS to address the full capacity. It is not for systems limited to lower maximum memory, platforms requiring ECC or registered DIMMs, or laptops and small-form-factor builds that use SO-DIMMs. Mixing with slower modules will reduce overall speed to the slowest installed pair.

Maximum supported capacity of 128GB across four

The motherboard documentation lists a 128GB ceiling across four sockets, so this 64GB kit leaves room for a second identical pair later. Populating all four slots with matched 32GB modules reaches that limit while maintaining dual-channel operation at the rated 2666 MT/s data rate.

How it compares

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

Price $321.99
Typical for this category: the median of 21,161 items is $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 $5.03 per GB
Cheaper than about 76% 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 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 ROG STRIX Z390-H GAMING, ROG STRIX Z490-A GAMING, ROG STRIX Z490-E GAMING
In the box
Included items2 Memory RAM Sticks

Questions about this item

Will the 288-pin DDR4 DIMMs fit the four slots on my ROG STRIX Z390-H GAMING motherboard?

Yes, the kit uses standard 288-pin DDR4 DIMMs and the board provides four DDR4 slots supporting up to 128 GB total capacity.

Which slots should I populate first on the Z490-E GAMING and what common step is missed?

Install the two sticks in the same-coloured slots (usually A2 and B2) to run dual-channel, and press down firmly until both retention clips click — many builders only engage one clip.

Do the modules need any cooling or firmware updates over their service life?

No heat spreader is fitted and no firmware exists on the modules; they run at 1.2 V with major-brand chips, so only occasional dust removal from the slots is required.

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