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Two black and red DDR4 desktop memory modules side by side

G.SKILL

G.SKILL Aegis F4-2666C19D-16GIS 16GB (2×8GB) DDR4 2666 CL19 desktop RAM

SKU CH-QH27-HVY7W MPN F4-2666C19D-16GIS

Dual-channel 16 GB DDR4 kit running at 2666 MHz with CL19 timings at 1.2 V

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Memory timings19-19-19-43
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 16 GB dual-channel kit doubles capacity for multitasking
  • DDR4 2666 speed delivers 21300 MT/s data rate
  • CL19 19-19-19-43 timings cut latency for snappier response
  • 20 V operation lowers power draw and heat
  • Tested on major Intel and AMD platforms for broad compatibility

Aegis DDR4 2666 dual-channel kit

This G.SKILL Aegis kit provides 16 GB of DDR4 memory in two matched 8 GB modules. It runs at 2666 MT/s with CL19 timing and 1.20 V operation. The kit targets desktop builders upgrading Intel or AMD platforms that support DDR4.

Check motherboard DDR4 slot count

Verify that your board has at least two free 288-pin DDR4 slots and consult its qualified vendor list for F4-2666C19D-16GIS. Do not combine this kit with other modules; mixing kits causes stability issues. Ensure the BIOS is updated for the memory speed you intend to run.

Sustained load runs at rated 1.20 V

Under continuous workloads the modules maintain DDR4-2666 at 19-19-19-43 timings without requiring elevated voltage. Heat spreaders in black and red help dissipate heat during extended gaming or rendering sessions. Stability is validated across major motherboard brands for long-term operation.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $29.99
Cheaper than about 79% of the 3,647 comparable items (median $90.99).
Total capacity 16 GB (2 × 8 GB)
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $1.87 per GB
Cheaper than about 95% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameG.SKILL
Product lineAegis
Model nameF4-2666C19D-16GIS
Total capacity16 GB (2 × 8 GB)
Product type288-Pin PC RAM
Product colorBlack / Red
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
Memory timings19-19-19-43
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Power
Rated voltage1.2 V
Size & build
Shipping weight0.07 kg
Package size151 × 121 × 15 mm
Compatibility
Recommended forAMD X399 / TRX40 / X570 / X470 / B550 / B450 / B350
Intel X99 / X299 / Z790 DDR4 / Z690 DDR4 / Z590 / Z490 / Z390 / Z370 / Z270 / Z170

Questions about this item

Will this 16GB kit run in dual channel on my motherboard?

Yes, the kit contains two matched 8GB modules designed to operate together in dual-channel mode on supported platforms.

Does the 1.20V voltage work with standard desktop boards?

The modules run at the standard DDR4 voltage of 1.20V, which is supported by all current desktop motherboards without manual adjustment.

What do the timings 19-19-19-43 mean for real use?

These figures are the CAS latency and related delays at 2666 MT/s; lower numbers would respond slightly faster, but CL19 is typical for this speed grade.

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