G.SKILL Trident Z5 CK RGB DDR5 8400MT/s 48GB CU-DIMM Memory Review

ReviewsMemory
By Brent Justice
9.3
OVERALL SCORE

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Test Setup

System Setup

We are using an MSI MEG Z890 ACE motherboard with the latest BIOS installed: 7E22v1AA0 dated 3/25/2026. We are testing with an Intel Core Ultra 7 270K Plus CPU. We are using the latest possible Intel Chipset Driver software: 10.1.20398.8776, and we have the Intel Platform Performance Package: 26.03.101.171 installed on both CPUs. We are using a GeForce RTX 5090 FE for all testing with driver 595.97, and we have Windows 11 25H2, all updates to 26200.8117. We are using the Intel Application Optimization Tool with everything enabled. All data was captured at the same time, with the same game patches, and everything was up to date at the time of testing.

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REVIEW OVERVIEW

Features
10
Performance
10
Aesthetics
10
Price Value
7

SUMMARY

The G.SKILL Trident Z5 CK RGB DDR5 8400MT/s 48GB CU-DIMM Memory is a flagship product from G.SKILL, and provides a CUDIMM option for high-end Intel Core Ultra and Intel Core Ultra Plus CPUs and the Z890 Platform. It truly represents a flagship product, with high-speed options beyond 8000MT/s with multiple XMP profiles, and good timings. It performed very well, and provided an uplift over the default performance, and is built with enthusiasts and overclocking in mind. This memory not only performs great, but also looks great with the mirrored piano black finish and RGB, giving it a unique look.
9.3
OVERALL SCORE

Discussion (3 replies)

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Peter_Brosdahl
Peter_Brosdahl

Price is ouch, but that's just the way things are now; the performance is wow. Not used to seeing so many gains in, well, everything, whether using tighter times at stock 6400 MT/s or the jump to 8400 MT/s. If I had a high-end Intel system and the money, these would be on my list.

ShmeeCat
ShmeeCat

Cool kit, seems similar to my Kingbank 48GB kit, but more expensive. Is this Hynix M die or something else?

ShmeeCat
ShmeeCat

These are my current settings.

I am am on AM5 of course, so I currently use my board's Hynix profile for 6000 MT/s with some tweaks. Thoughts?
Also how do I tell if these are CUDIMMs or not?

Brent Justicehttps://www.thefpsreview.com
Former managing editor of GPUs at HardOCP for 18 years, Brent Justice has been reviewing computer components since the late 90s, educated in the art and method of the computer hardware review, he brings experience, knowledge, and hands-on testing with a gamer-oriented and hardware enthusiast perspective. You can follow him on Twitter - @Brent_Justice You can sub to his YouTube channel - Justice Gaming https://www.youtube.com/c/JusticeGamingChannel You can check out his computer builds on KIT - @BrentJustice https://kit.co/BrentJustice

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