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Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB) specifications and in-depth review

Crucial CT2K64G56C46S5 DDR5-5600 128GB (2x64GB)

Manufacturer: Crucial

The Crucial CT2K64G56C46S5 DDR5-5600 is a 128GB dual-channel memory kit designed for systems using the SO-DIMM form factor. Consisting of two 64GB modules in a 262-pin SO-DIMM configuration, it operates at DDR5-5600 MHz and is built around a straightforward, no-frills design without a heatsink or RGB lighting, keeping the physical profile compact at just 30mm in height.

From a technical standpoint, the kit runs at CL46-46-45-45 timings with a true latency of 16.4 ns and a rated voltage of 1.1V. It carries Intel XMP 3.0 support for straightforward frequency activation, though it does not use Samsung B-Die memory nor does it support ECC. The SPD-rated speed matches the tested speed at 5600 MHz, and ECC functionality is not available on this kit.

Pros
  • Total capacity of 128GB across two modules suits memory-intensive workloads that require large amounts of RAM
  • Intel XMP 3.0 support allows the rated 5600 MHz speed to be enabled without manual timing configuration
  • The SO-DIMM form factor and 30 mm height make it compatible with compact systems where space is limited
  • Operates at a low 1.1V, keeping power draw modest relative to the memory capacity offered
  • Both the tested speed and SPD-rated speed align at 5600 MHz, indicating consistent and predictable behavior out of the box
Cons
  • CL46 timings are relatively loose for DDR5-5600, resulting in a true latency of 16.4 ns that is not among the tighter options at this speed
  • No ECC support limits use in environments where data integrity verification is a requirement
  • The absence of a heatsink may be a consideration in thermally constrained enclosures running sustained memory loads
  • Does not use Samsung B-Die, which may matter to users who specifically seek that memory configuration
  • No AMD EXPO support; only Intel XMP 3.0 is available, which may limit straightforward overclocking on AMD platforms
Who is this for?

This kit is well-suited for users running memory-intensive workloads on compact or portable systems that accept the SO-DIMM form factor, such as small form factor desktops or high-capacity laptops. With a combined 128GB across two modules and Intel XMP 3.0 support for straightforward 5600 MHz activation, it fits users who need substantial memory headroom — such as those working with large datasets, virtualization, or demanding creative applications — without requiring manual timing adjustments to reach rated speeds.

Who is this NOT for?

This kit is not a good fit for users who require ECC memory support, such as those running workloads where data integrity verification is critical, including certain server or workstation environments. It is also poorly matched for AMD platform users seeking native EXPO support, since only Intel XMP 3.0 is available. Additionally, users prioritizing tight memory timings at DDR5-5600 will find the CL46 latency figures less than optimal, as the 16.4 ns true latency is on the looser end for this speed grade.

Performance:

true latency 16.4 ns
memory speed (Tested Speed) 5600
memory speed (SPD) 5600 MHz
DDR memory version 5
CAS Latency (CL) 46
tRAS timing 45
tRCD timing 46
tRP timing 45

This DDR5 kit operates at a tested and SPD-rated speed of 5600 MHz, with primary timings set at CL46-46-45-45 (CL, tRCD, tRAS, and tRP respectively). The CAS Latency of 46 at that frequency translates to a true latency of 16.4 ns, giving a clear picture of the actual memory response time under normal operating conditions.

General info:

form factor 262-pin SO-DIMM
memory size (total) 2 x 64GB
has Samsung B-Die ✕
voltage 1.1V
height 30 mm
memory size 64GB

The kit uses a 262-pin SO-DIMM form factor and consists of two 64GB modules for a total capacity of 128GB, with each module standing 30 mm tall. It operates at 1.1V and does not use Samsung B-Die memory.

Features:

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

This kit supports Intel XMP 3.0 for straightforward frequency configuration, while ECC memory is not supported. It ships without an integrated heatsink and has no RGB lighting, keeping the design minimal and unobtrusive.

Benchmarks:

Final Verdict

The Crucial CT2K64G56C46S5 DDR5-5600 is a high-capacity SO-DIMM kit that makes a clear case for users who need 128GB of DDR5 memory in a compact form factor with minimal setup friction thanks to Intel XMP 3.0 support. Its strengths lie in raw capacity and predictable out-of-the-box behavior at 5600 MHz, though users who prioritize tight latencies, ECC functionality, or AMD EXPO compatibility will find it falls short of their requirements. For the right use case — memory-heavy workloads on Intel-based compact systems — it delivers a straightforward and capable solution.

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