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G.Skill Trident Z5 Royal DDR5-8400 CL40 48GB (2x24GB) specifications and in-depth review

G.Skill Trident Z5 Royal DDR5-8400 CL40 48GB (2x24GB)

Manufacturer: G.Skill

G.Skill's Trident Z5 Royal DDR5-8400 is a high-frequency desktop memory kit designed for enthusiast platforms that support DDR5. It ships as a dual-module configuration totaling 48GB, with each 24GB module seated in a standard 288-pin DIMM slot. The kit includes an integrated heatsink alongside RGB lighting built into the housing, with a profile height of 43 mm.

On the technical side, the kit is rated for a tested speed of 8400 MHz with primary timings of CL40-52-52-134 and a true latency figure of 9.52 ns at that frequency. The SPD-programmed base speed sits at 5600 MHz, and the kit relies on Intel XMP 3.0 to reach its advertised overclock. It operates at 1.4V, does not use Samsung B-Die, and does not support ECC functionality.

Pros
  • Tested speed of 8400 MHz places it among the higher-frequency DDR5 kits available for desktop platforms
  • Intel XMP 3.0 support allows the rated frequency profile to be activated without manual timing configuration
  • Total capacity of 48GB across two modules suits memory-intensive workloads that benefit from larger pools of RAM
  • Integrated heatsink helps manage heat dissipation during sustained operation
  • RGB lighting is built into the module housing for users who prioritize illuminated builds
Cons
  • CL40 timings at 8400 MHz result in a true latency of 9.52 ns, which is not particularly tight for DDR5
  • The SPD base frequency is only 5600 MHz, meaning the advertised speed is only achievable with XMP enabled
  • Does not support ECC, ruling it out for workloads or platforms that require error-correcting memory
  • At 43 mm tall, the heatsink height may cause clearance conflicts with large air coolers
  • Does not use Samsung B-Die, which some users specifically seek out for manual overclocking headroom
Who is this for?

This kit is well-suited for desktop enthusiasts running platforms that support Intel XMP 3.0, where the 8400 MHz profile can be activated without manual configuration. The 48GB total capacity across two modules makes it a practical choice for memory-intensive tasks such as video editing, 3D rendering, or large dataset processing, where having ample headroom matters. Users who prioritize an illuminated build aesthetic will also find the integrated RGB lighting and heatsink a natural fit for windowed cases.

Who is this NOT for?

This kit is not a good match for users on AMD EXPO-only platforms, as it exclusively supports Intel XMP 3.0 and will not reach its rated speed on incompatible motherboards. Those who require ECC memory for error-sensitive or mission-critical workloads will need to look elsewhere, as this kit does not support error correction. Additionally, users pairing it with large tower air coolers should verify case and cooler clearance, since the 43 mm module height can create physical conflicts in tighter builds.

Performance:

true latency 9.52 ns
memory speed (Tested Speed) 8400
memory speed (SPD) 5600 MHz
DDR memory version 5
CAS Latency (CL) 40
tRAS timing 134
tRCD timing 52
tRP timing 52

This DDR5 kit operates at a tested speed of 8400 MHz, well above its SPD-programmed base frequency of 5600 MHz, with primary timings of CL40-52-52-134 across CAS Latency, tRCD, tRP, and tRAS respectively. At that rated frequency, the true latency works out to 9.52 ns, reflecting the relationship between clock speed and timing values inherent to high-frequency DDR5 operation.

General info:

form factor 288-pin DIMM
memory size (total) 2 x 24GB
has Samsung B-Die ✕
voltage 1.4V
height 43 mm
memory size 24GB

The kit uses a standard 288-pin DIMM form factor and consists of two 24GB modules for a combined capacity of 48GB, running at a rated voltage of 1.4V. Each module stands 43 mm tall and does not use Samsung B-Die memory chips.

Features:

Intel XMP / AMD EXPO Intel XMP 3.0
Supports ECC memory ✕
Has an integrated heatsink ✓
has RGB lighting ✓

The kit supports Intel XMP 3.0 for straightforward frequency profile activation and includes an integrated heatsink along with RGB lighting. ECC memory functionality is not supported.

Benchmarks:

Final Verdict

The G.Skill Trident Z5 Royal DDR5-8400 is a capable high-frequency memory kit that delivers on its core promise of 8400 MHz DDR5 operation via Intel XMP 3.0, backed by a generous 48GB total capacity that suits demanding desktop workloads. Its CL40 timings and 1.4V operating voltage are reasonable trade-offs at this frequency range, though users should be aware of the platform and clearance requirements that come with a module of this height and specification profile. For enthusiasts building an Intel XMP-compatible system who need both capacity and elevated memory speeds, the Trident Z5 Royal DDR5-8400 is a well-defined kit with a clear target audience.