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Four green DDR4 DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 64GB (4x16GB) DDR4 2666 CL19 DIMM kit D56

SKU CH-KPKG-38GEX

64 GB DDR4 kit of four 16 GB DIMMs at 2666 MHz CL19 for ASUS ROG Maximus XI and XII Hero boards

  • 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 across four 16 GB modules
  • DDR4 2666 MHz speed rated at PC4-21300
  • CL19 CAS latency with 19-19-19 timing
  • 2 V low-voltage operation for efficient power use
  • Validated for ASUS ROG MAXIMUS XI and XII HERO motherboards

64GB DDR4 kit for ASUS ROG MAXIMUS XI/XII HERO

This 64GB kit contains four 16GB DDR4 2666 CL19 DIMMs built for ASUS ROG MAXIMUS XI HERO (WI-FI), ROG MAXIMUS XI HERO and ROG MAXIMUS XII HERO (Wi-Fi) motherboards. It targets builders who need the full 64GB capacity on these specific boards. Unbuffered non-ECC modules run at 1.2V with 19-19-19 timings.

288-pin unbuffered DIMMs without heat spreaders

Each stick uses a 288-pin DDR4 interface and major-brand chips in a 2Rx8 configuration. The absence of heat spreaders keeps the profile low for tight CPU cooler clearance. Four modules fill every slot on the supported boards, so the memory controller operates at the rated 2666 speed when the CPU allows it.

Verify your board model

Compatibility is limited to the listed ASUS/Asmobile ROG MAXIMUS XI and XII HERO models plus the 242 P11C-I, 242 P11C-M/4L and 246 WS C246 PRO boards. The platform maximum is 128GB across four sockets, so this kit uses all available slots. A 64-bit operating system is required to address more than 4GB. Buyers needing ECC, registered modules or speeds above 2666 should look elsewhere.

How it compares

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

Price $406.99
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 $6.36 per GB
Cheaper than about 62% 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 systemsASUS/Asmobile Motherboard ROG MAXIMUS XI HERO (WI-FI), ROG MAXIMUS XI HERO, ROG MAXIMUS XII HERO (Wi-Fi)
In the box
Included items4 Memory RAM Sticks

Questions about this item

What does the DDR4 2666 (PC4 21300) rating mean for actual speed on the ROG MAXIMUS XI HERO?

The kit runs at 2666 MHz with CL19 timing at 1.2 V; the motherboard will operate it at that speed unless the CPU memory controller limits it lower.

Will the four 288-pin DIMMs fit the four slots on the ROG MAXIMUS XII HERO (Wi-Fi) without clearance issues?

Yes, the board has four DDR4 slots and these unbuffered 288-pin modules occupy all of them; no heat spreader is present so large coolers rarely interfere.

Which slot order should I use when installing the 4 x 16 GB sticks for dual-channel operation?

Populate the same-coloured slots first — usually slots 2 and 4, then 1 and 3 — so the board sees matched pairs per channel.

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