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Single black and red DDR4 DIMM with a low-profile heat spreader

G.SKILL

G.SKILL Aegis F4-2666C19S-8GIS 8GB DDR4 2666 CL19 desktop RAM

SKU CH-HR4K-WXDZA MPN F4-2666C19S-8GIS

An 8 GB DDR4 module running at 2666 MT/s with CL19 timing and 1.20 V operation

  • Capacity8GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Timing19-19-19-43
  • Voltage1.20V
  • BIOS/Performance ProfileIntel XMP 2.0

Capacity 8GB

Speed DDR4 2666 (PC4 21300)

CAS Latency CL19

  • 8GB DDR4 2666 capacity boosts multitasking headroom
  • CL19 19-19-19-43 timings deliver responsive system performance
  • 20V low voltage reduces power draw and heat
  • Intel XMP 2.0 profile enables one-click speed setup
  • Black and red heat spreader adds visual flair to builds

G.SKILL Aegis 8GB DDR4-2666 CL19

This single 8GB DDR4 module runs at 2666 MT/s with CL19 latency and 1.20V operation. It carries an Intel XMP 2.0 profile for automatic configuration on supported platforms. The black and red heat spreader distinguishes the Aegis line in a gaming build.

CL19 19-19-19-43 timing at 2666 MT/s

The decisive specification is the rated speed of DDR4-2666 (PC4-21300) combined with CL19 primary latency and 19-19-19-43 sub-timings. These figures determine whether the module matches the memory controller capabilities of the target motherboard and CPU.

Sustained-load behaviour with XMP 2.0 profile

Under continuous workloads the module maintains its 1.20V setting and rated timings without requiring manual voltage increases. The hand-selected ICs and validation across major motherboard brands aim to deliver stable throughput during extended gaming or rendering sessions rather than only in short benchmarks.

Highlights

  • 8GB DDR4 2666 capacity boosts multitasking headroom
  • CL19 19-19-19-43 timings deliver responsive system performance
  • 20V low voltage reduces power draw and heat
  • Intel XMP 2.0 profile enables one-click speed setup
  • Black and red heat spreader adds visual flair to builds

Specifications

BrandG.SKILL
SeriesAegis
ModelF4-2666C19S-8GIS
Capacity8GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Timing19-19-19-43
Voltage1.20V
BIOS/Performance ProfileIntel XMP 2.0
ColorBlack / Red
FeaturesDDR4 memory designed for compatible Intel or AMD platforms.
Do not mix memory kits. Memory kits are sold in matched kits that are designed to run together as a set. Mixing memory kits will result in stability issues or system failure.
Memory kits will boot at the SPD speed at default BIOS settings with compatible hardware.
Usage in any manner inconsistent with manufacturer specifications, warnings, designs, or recommendations will result lower speeds, system instability, or damage to the system or its components.
Refer to the G.SKILL memory kit QVL on the G.SKILL website to check mot
Recommend UseAMD X399 / TRX40 / X570 / X470 / B550 / B450 / B350
Intel X99 / X299 / Z790 DDR4 / Z690 DDR4 / Z590 / Z490 / Z390 / Z370 / Z270 / Z170
Shipping weight0.05 kg
Package size152 × 64 × 15 mm

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Questions about this item

What does the DDR4 2666 speed rating mean for my system?

The module runs at 2666 MT/s, giving your CPU a peak transfer rate of PC4 21300 bandwidth when the platform supports that data rate.

How does the Intel XMP 2.0 profile affect the timings?

The XMP 2.0 profile sets the stick to CL19 with 19-19-19-43 timings at 1.20 V so the motherboard can apply those settings automatically.

Will this single 8 GB stick fit my standard desktop motherboard?

Yes, it uses a regular DDR4 DIMM form factor with a black and red heat shield that fits standard desktop memory slots.

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