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Corsair Vengeance DDR5-6400 C42 128GB (2x64GB) specifications and in-depth review

Corsair Vengeance DDR5-6400 C42 128GB (2x64GB)

Manufacturer: Corsair

The Corsair Vengeance DDR5-6400 is a high-capacity desktop memory kit designed for systems that support DDR5. Offered as a dual-module configuration totaling 128GB, it uses the standard 288-pin DIMM form factor and carries an integrated heatsink to help manage operating temperatures. The kit does not feature RGB lighting, keeping its profile straightforward and functional.

Running at a tested speed of 6400 MHz with a CAS latency of 42, the kit delivers a true latency of approximately 13.12 ns. Secondary timings are set at tRCD 52, tRP 52, and tRAS 104. The SPD-programmed base speed sits at 4800 MHz, while the XMP 3.0 profile enables the full 6400 MHz frequency when supported by the motherboard. Operating voltage is rated at 1.35V, and the modules stand 35 mm tall. ECC is not supported, and the kit does not use Samsung B-Die ICs.

Pros
  • Operates at a tested speed of 6400 MHz, well above the 4800 MHz SPD base frequency
  • Total capacity of 128GB across two modules suits memory-intensive workloads that require large amounts of RAM
  • Intel XMP 3.0 support allows straightforward frequency tuning on compatible motherboards
  • Integrated heatsink helps manage module temperatures during sustained use
  • Compact 35 mm height reduces the likelihood of clearance conflicts with CPU coolers
Cons
  • CAS Latency of 42 cycles is relatively high, resulting in a true latency of 13.12 ns which may not suit latency-sensitive applications
  • Does not support ECC, making it unsuitable for workloads that require error-correcting memory
  • No AMD EXPO profile is included, limiting native overclocking support to Intel XMP-compatible platforms
  • Samsung B-Die ICs are absent, which some users specifically seek for manual overclocking headroom
Who is this for?

This kit is well-suited for users building high-capacity desktop workstations that benefit from 128GB of total DDR5 memory, such as those running memory-intensive applications like video editing, 3D rendering, or large dataset processing. The Intel XMP 3.0 profile makes it a practical choice for users on compatible Intel platforms who want to run at 6400 MHz without manual tuning. The integrated heatsink and modest 35 mm height also make it a reasonable fit for builds where thermal management and cooler clearance are considerations.

Who is this NOT for?

This kit is not a good match for users on AMD platforms, as it lacks an EXPO profile and native overclocking support would be limited to XMP-compatible motherboards only. It is equally unsuitable for environments requiring ECC memory, such as servers or professional workstations where data integrity under load is a strict requirement. Users who prioritize low absolute latency will also find the CL42 timing at 6400 MHz less appealing, as the resulting true latency of 13.12 ns may not meet the needs of latency-sensitive computing tasks.

Performance:

true latency 13.12 ns
memory speed (Tested Speed) 6400
memory speed (SPD) 4800 MHz
DDR memory version 5
CAS Latency (CL) 42
tRAS timing 104
tRCD timing 52
tRP timing 52

The Performance section of this DDR5 kit centers on a tested memory speed of 6400 MHz, while the SPD-programmed base frequency sits at 4800 MHz. The CAS Latency is rated at CL42, which at 6400 MHz translates to a true latency of 13.12 ns. Rounding out the timing profile, tRCD and tRP are both set to 52 cycles, with tRAS coming in at 104 cycles.

General info:

form factor 288-pin DIMM
memory size (total) 2 x 64GB
has Samsung B-Die ✕
voltage 1.35V
height 35 mm
memory size 64GB

This kit uses the standard 288-pin DIMM form factor and consists of two 64GB modules for a total capacity of 128GB. Each module operates at 1.35V and stands 35 mm tall. The kit does 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 configuration on compatible platforms. An integrated heatsink is included to assist with thermal management during operation. RGB lighting is not present on these modules, and ECC memory is not supported.

Benchmarks:

Final Verdict

The Corsair Vengeance DDR5-6400 C42 128GB is a high-capacity DDR5 kit built around a clear purpose: delivering substantial memory headroom for demanding desktop workloads on Intel XMP 3.0-compatible platforms. Its 128GB total capacity across two 64GB modules sets it apart as a practical choice for memory-intensive tasks where sheer capacity matters more than absolute latency figures. The CL42 timings and absence of AMD EXPO support do narrow its appeal to a specific audience, and users with strict latency or ECC requirements will need to look elsewhere. For Intel-platform builds where large working memory is the priority, however, this kit offers a well-defined and coherent specification set that delivers on its intended use case.

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