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G.SKILL Trident Z5 RGB DDR5 128GB (2x64GB) 6400MT/s CL36
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Overview
The G.SKILL Trident Z5 RGB is a 128GB DDR5 kit of 2 x 64GB modules, rated for 6,400 MT/s at 36-44-44-102 timings and 1.35V through its Intel XMP 3.0 profile. It puts 128GB on two 64GB modules at 6400 MT/s, in G.SKILL's black Trident Z5 RGB design.
It carries an Intel XMP 3.0 profile, so it is aimed at Intel Core Ultra 200S (LGA1851) and 12th to 14th Gen Core (LGA1700) boards; most AM5 boards can also load XMP profiles, but G.SKILL tests this kit for Intel. Without the profile it runs at the default 5600 MT/s at 1.10V; one BIOS setting brings it to 6,400 MT/s. 64GB modules need a motherboard BIOS dated 2025 or later with 64GB module support, so update the BIOS before installing.
128GB suits workstation loads: big video timelines, simulation, many virtual machines. For local AI, 128GB holds a 70B model at 4-bit with plenty of room, or a mixture-of-experts model of around 120B parameters at 4-bit, which is where CPU inference gets interesting.
Specifications
| Capacity | 128GB (2 x 64GB) |
|---|---|
| Kit | Dual-channel kit, two matched modules |
| Rated speed | DDR5-6400 (Intel XMP 3.0) |
| Timings | 36-44-44-102 |
| Voltage | 1.35V |
| Default (JEDEC) speed | 5600 MT/s at 1.10V |
| Type | Unbuffered (UDIMM), non-ECC |
| Profiles | Intel XMP 3.0 |
|---|---|
| Platforms | Intel LGA1851 and LGA1700 (XMP); many AM5 boards load XMP |
| BIOS | Motherboard BIOS dated 2025 or newer with 64GB module support |
| Mixing kits | Sold as a matched kit; do not mix with other kits |
| Lighting | RGB |
|---|---|
| Heat spreader | Aluminium |
| Warranty | Limited lifetime warranty (G.SKILL) |
| Part number | F5-6400J3644F64GX2-TZ5RK |
Questions and answers
Still unsure? Visit the help center or message us.
Will this kit work with my motherboard?
It fits any DDR5 desktop board. Its XMP 3.0 profile targets Intel LGA1851 and LGA1700; most AM5 boards also load XMP profiles, though G.SKILL validates this kit for Intel. It does not fit DDR4 boards. 64GB modules also need a BIOS dated 2025 or newer.
How do I get the rated 6,400 MT/s?
Enable the Intel XMP 3.0 profile in the BIOS. Without it the kit runs at the default 5600 MT/s. Rated speeds depend on the CPU's memory controller and the board, so a small number of systems need a BIOS update or a slightly lower speed.
Why does it need a 2025 BIOS?
64GB DDR5 modules arrived in 2025, and motherboards need a BIOS with support for them. Update to the latest BIOS before installing; older firmware may not boot or may see only part of the memory.
Is 128GB enough for local AI?
For local AI, 128GB holds a 70B model at 4-bit with plenty of room, or a mixture-of-experts model of around 120B parameters at 4-bit, which is where CPU inference gets interesting.
Can I add another kit later?
Memory makers sell kits as matched sets and advise against mixing kits, even identical ones, because the modules are tested together. Buy the total capacity you want as one kit.
Pairs well with
Picked to go with this product. Check sizes and connectors for your build before you order.
