Corsair Vengeance RGB CMH64GX5M2B6400C32 (64GB 2x32GB Kit/DDR5 6400MHz/CL32/1.40V/RGB Anodized Aluminium Black/Intel XMP 3.0 + AMD EXPO)
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- Model:
- Corsair Vengeance RGB|CMH64GX5M2B6400C32|B Revision
- Capacity:
- 64GB|2x32GB Kit|32GB per Module
- Memory Type:
- DDR5|288-Pin DIMM|Non-ECC|Unbuffered
- Speed:
- 6400MHz|PC5-51200
- Timings:
- CL32
- Voltage:
- 1.40V
- Overclocking:
- Intel XMP 3.0|AMD EXPO
- Heat Spreader:
- Anodized Aluminum|RGB Light Bar|iCUE Controlled
- Color Options:
- Black|White
- Form Factor:
- Desktop DIMM
- Compatibility:
- Intel and AMD DDR5 Platforms|XMP 3.0 and EXPO Support
- Warranty:
- Limited Lifetime
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: Corsair Last updated: September 7, 2026
The Corsair Vengeance RGB CMH64GX5M2B6400C32 is a 64GB (2x32GB) DDR5 kit running at 6400MHz with CL32 timings and 1.40V voltage, combining Corsair's highest mainstream RGB capacity tier with a speed grade above the 6000MHz mainstream. This is the flagship-tier configuration in the family covered on this site: highest capacity, highest frequency, and a CAS latency tighter than the 32GB CL36 kit at the same 6400MHz speed.
32GB-per-module kits are a relatively recent capacity point for consumer DDR5, and CL32 at 6400MHz represents Corsair pushing both capacity and speed simultaneously rather than trading one for the other, which is reflected in this being one of the more expensive kits in the lineup.
Performance and Timings
CL32 at 6400MHz gives exactly 10ns true latency, matching the 32GB CL30 kit at 6000MHz almost exactly despite running at a higher frequency, because the higher clock speed offsets the two-point CAS increase. In practice this kit combines the latency profile of Corsair's tightest 6000MHz kits with the extra bandwidth of the higher 6400MHz frequency, plus double the per-kit capacity of the 32GB options elsewhere in this line. For workloads that are genuinely capacity-bound, virtual machines, large dataset work, heavy multitasking alongside content creation, the jump to 64GB matters more than any latency figure. For pure gaming, 32GB remains sufficient for nearly everyone, and this kit's real advantage there is the 6400MHz frequency and CL32 timing rather than the extra capacity.
Compatibility
DDR5 only. Enable XMP 3.0 on Intel or EXPO on AMD to reach 6400MHz. As with the 32GB version of this speed grade, check the board's QVL specifically for 6400MHz support, and note that running two 32GB modules is generally easier for a memory controller to stabilise at high speed than four smaller modules would be, which is part of why this ships as a two-module kit rather than four. On AMD platforms, running above 6000MHz typically means the infinity fabric no longer tracks memory at a clean 1:1 ratio; on Intel platforms without that constraint, 6400MHz is a more direct performance gain.
Module Count and Rank
Two 32GB modules, the largest per-module capacity covered in this product family. This keeps the kit at two DIMMs rather than four, which is meaningfully easier to stabilise at 6400MHz than a four-module 64GB configuration would be. As with every kit in this line, buy the full capacity needed upfront in one matched kit rather than planning to add a second kit later.
Design and Build
Standard Vengeance RGB heat spreader and per-module light bar controlled through iCUE, in this black finish alongside a white option. Build quality matches the rest of the Vengeance RGB DDR5 range; the module itself is physically the same design scaled to 32GB per stick rather than a different construction.
Overclocking and BIOS Setup
Boots at JEDEC baseline until XMP or EXPO is enabled. Select the correct profile, choose the 6400MHz CL32 setting, save, reboot, verify in CPU-Z. Given the combination of high capacity and high frequency, confirm the board's QVL specifically lists this kit or an equivalent 64GB 6400MHz configuration, and update BIOS beforehand; high-capacity, high-frequency DDR5 kits are generally the least forgiving combination for a board's memory controller to handle on the first XMP or EXPO attempt.
Comparison to Sibling Products
Against the 32GB CL36 kit at the same 6400MHz speed, this kit doubles capacity and tightens CAS latency for a substantial price increase, the clear step-up choice for anyone who has decided they need 64GB. Against Corsair's 6000MHz CL30 32GB kit, this trades capacity headroom and slightly higher bandwidth for a real cost premium; buyers who don't specifically need 64GB are generally better served by the 32GB options elsewhere in this line.
Who This Kit Is Actually For
Content creators, developers running VMs, and heavy multitaskers who are genuinely capacity-bound. 64GB with tight timings and high frequency in one kit. Buyers on Intel platforms without a memory-fabric ceiling wanting both capacity and speed. The combination this kit is built around. Not for gaming-focused builds. 32GB remains sufficient for essentially all current games; this kit's price premium buys capacity most gaming builds won't use. Not for anyone uncertain their board handles high-frequency, high-capacity DDR5 cleanly. Check the QVL and update BIOS before buying.
Expert Review
Rated by the Consumercarts editorial team, not by users
Best for
- Content creators, developers running VMs, and heavy multitaskers who are genuinely capacity-bound
- Buyers on Intel platforms without a memory-fabric ceiling wanting both capacity and speed
Not for
- gaming-focused builds
- anyone uncertain their board handles high-frequency, high-capacity DDR5 cleanly