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

G.Skill Trident Z5 CK RGB DDR5-8400 48GB (2x24GB)

Manufacturer: G.Skill

G.Skill's Trident Z5 CK RGB DDR5-8400 is a high-frequency desktop memory kit designed for systems that support DDR5. Arriving in a 48GB total capacity spread across two 24GB modules, it operates under Intel XMP 3.0 profiles and features RGB lighting alongside an integrated heatsink, fitting into a standard 288-pin DIMM slot at a height of 42.5 mm.

On the timing side, the kit runs at a tested speed of 8400 MHz with CL40-52-52-134 primary timings, translating to a true latency of 9.52 ns. The SPD-programmed baseline sits at 6400 MHz, and the modules operate at 1.4V. ECC is not supported, and the modules do not use Samsung B-Die ICs.

Pros
  • Tested speed of 8400 MHz places it among the higher-frequency DDR5 kits available in the DIMM form factor
  • True latency of 9.52 ns reflects a reasonable balance between clock speed and CAS Latency for a high-frequency DDR5 module
  • Intel XMP 3.0 support allows straightforward one-click frequency and timing activation in compatible systems
  • Integrated heatsink aids thermal management during sustained operation
  • RGB lighting offers visual customization for builds where aesthetics matter
  • 48GB total capacity across two modules provides meaningful headroom for memory-intensive workloads
Cons
  • CAS Latency of 40 is relatively high, which is a common trade-off at elevated DDR5 frequencies
  • SPD base speed of 6400 MHz means the system will default to a significantly lower frequency without XMP enabled
  • Does not support ECC, making it unsuitable for workloads that require error-correcting memory
  • Samsung B-Die ICs are absent, which may matter to users who prioritize that specific memory chip for overclocking purposes
  • Module height of 42.5 mm may cause clearance issues with large air coolers in compact builds
Who is this for?

This kit is well-matched for desktop builders targeting high-frequency DDR5 platforms with Intel XMP 3.0 support, where pushing memory speeds to 8400 MHz is a priority. The 48GB total capacity across two modules also makes it a reasonable fit for users running memory-intensive applications such as video editing, 3D rendering, or large dataset processing, where having ample headroom matters. The integrated heatsink adds a layer of thermal stability, and the RGB lighting suits users who care about the visual presentation of their build.

Who is this NOT for?

This kit is not a good fit for users who require ECC memory, such as those building workstations or servers where data integrity under continuous load is essential. The high CAS Latency of 40 and the reliance on XMP to reach rated speeds mean it is also poorly suited to systems that will run at SPD default speeds, since the memory will fall back to 6400 MHz without profile activation. Additionally, the 42.5 mm module height may create clearance conflicts in compact or small-form-factor builds paired with large tower air coolers.

Performance:

true latency 9.52 ns
memory speed (Tested Speed) 8400
memory speed (SPD) 6400 MHz
DDR memory version 5
CAS Latency (CL) 40
tRAS timing 134
tRCD timing 52
tRP timing 52

The G.Skill Trident Z5 CK RGB DDR5-8400 operates as a DDR5 kit with a tested memory speed of 8400 MHz, while its SPD-programmed baseline sits at 6400 MHz. The primary timings run at CL40-52-52-134, covering CAS Latency, tRCD, tRP, and tRAS respectively, which work out to a true latency of 9.52 ns under those conditions.

General info:

form factor 288-pin DIMM
memory size (total) 2 x 24GB
has Samsung B-Die ✕
voltage 1.4V
height 42.5 mm
memory size 24GB

This kit uses the standard 288-pin DIMM form factor and comes configured as two 24GB modules for a total of 48GB. Each module stands 42.5 mm tall and operates at 1.4V. The modules do not use Samsung B-Die ICs.

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 and timing configuration, and comes fitted with an integrated heatsink along with RGB lighting. ECC memory is not supported.

Benchmarks:

Final Verdict

The G.Skill Trident Z5 CK RGB DDR5-8400 is a purpose-built kit for enthusiast desktop platforms where pushing DDR5 frequencies is the primary objective. Its 8400 MHz tested speed paired with Intel XMP 3.0 support makes the setup process straightforward on compatible hardware, and the 48GB total capacity adds practical versatility for demanding workloads. That said, the high CAS Latency and the dependency on XMP activation to reach rated speeds mean the kit performs best in the hands of users who are actively configuring their system rather than running defaults. For builders who need ECC support or are working within tight cooler clearance constraints, it falls outside the ideal fit — but for those building an XMP-capable DDR5 system where both capacity and raw frequency matter, the Trident Z5 CK RGB DDR5-8400 delivers a clear and well-defined proposition.