CORSAIR CMA64GX5M4B6400C32 Ws Rdimm Ecc 840006690757 64GB DDR5 PC5 51200

( Brand: Corsair ), ( Manufacturer Part Number: CMA64GX5M4B6400C32 ), ( Memory Features: Ecc Memory ), ( Form Factor: Rdimm ), ( Total Capacity: 64 Gb ), ( Country Of Origin: Taiwan ), ( Type: 288-pin Ddr5 Rdimm ), ( UPC: 840006690757 )

Review CORSAIR Ws Rdimm Series 16gb Ecc Registered 6400 Pc5 Ser

The **Corsair CMK64GX5M4B6400C32 WS RDIMM 64GB ECC DDR5-6400** memory kit is a high-performance, enterprise-grade solution designed to elevate the capabilities of modern workstation and server platforms while delivering uncompromising reliability and speed. Engineered for professionals who demand precision, efficiency, and scalability, this kit features **64GB of high-density, registered (RDIMM) DDR5 memory** across four 16GB DIMMs, ensuring seamless integration into high-end systems that support dual-channel configurations. The **DDR5-6400 (PC5-51200) clock speed** provides blazing-fast data transfer rates, enabling accelerated workloads such as 3D rendering, AI processing, video editing, and large-scale data analysis where every millisecond counts. With a **low CAS latency of 32**, this memory kit optimizes latency-sensitive applications, ensuring smoother performance in demanding environments.

Built with **ECC (Error-Correcting Code) technology**, this kit safeguards critical data against corruption, making it an ideal choice for mission-critical operations, financial modeling, scientific simulations, and any application where data integrity is non-negotiable. The **RDIMM (Registered DIMM) architecture** further enhances stability and signal integrity in multi-socket server systems, reducing the risk of errors in high-channel-count configurations. Corsair s **Vengeance RGB** branding extends beyond aesthetics, as the kit features sleek, professional-grade heat spreaders with a **black and silver color scheme**, blending performance with a refined visual appeal perfect for workstations that balance power and presentation. Compatible with a wide range of **Intel Xeon, AMD EPYC, and high-end desktop platforms** (such as Intel 13th/14th Gen Core and AMD Ryzen Threadripper/EPYC CPUs), this memory kit is engineered to push the boundaries of what modern computing can achieve.

For professionals who require both speed and dependability, the **Corsair CMK64GX5M4B6400C32 WS** delivers a robust, future-proof solution that adapts to evolving workloads. Whether deployed in a high-performance workstation for creative professionals or a server environment handling enterprise-grade tasks, this memory kit ensures peak efficiency, reduced latency, and long-term reliability making it a standout choice for those who refuse to compromise on performance.

### **Pros and Cons of the Corsair CMK64GX5M4B6400C32 (64GB DDR5 ECC RDIMM 6400MHz) Memory Kit**

#### **Pros**

1. **High Performance for Workloads** DDR5-6400 (PC5-51200) memory is optimized for modern CPUs (Intel 13th/14th Gen, AMD Ryzen 7000/8000) and provides faster data transfer rates compared to DDR4, improving latency-sensitive applications like gaming, content creation, and professional workloads.

2. **ECC Support** Error-Correcting Code (ECC) memory is crucial for data integrity, making it ideal for servers, workstations, and systems running intensive tasks (e.g., rendering, database management, scientific computing). It helps prevent silent data corruption, which is a significant risk in long-running or mission-critical applications.

3. **High Capacity (64GB)** A 64GB kit is well-suited for high-end gaming PCs, content creators, and professionals who require ample RAM for multitasking, large datasets, or virtualization. It also future-proofs the system for upcoming software demands.

4. **RDIMM Form Factor** Registered DIMMs (RDIMMs) are designed for stability in multi-channel systems, reducing signal interference and improving reliability in high-channel-count configurations (e.g., 4-channel Intel or AMD platforms). This makes it a better choice for servers and workstations than unbuffered (UDIMM) memory.

5. **Corsair Brand Reputation** Corsair is a well-known manufacturer with a strong track record for quality, reliability, and customer support. Their memory kits are often well-tested for compatibility with major motherboard manufacturers.

6. **Compatibility with High-End Platforms** This kit is designed for enterprise-grade and high-performance desktop platforms, ensuring it works well with motherboards that support DDR5 ECC RDIMMs (e.g., ASUS ROG Strix, MSI MEG, Gigabyte TRX40, or Intel X299/Xeon platforms).

7. **Future-Proofing** DDR5 is the current standard, and 6400MHz is a high-speed option that will remain relevant for several years. Upgrading to DDR5 now avoids the need for a full memory replacement in the near future.

---

#### **Cons**

1. **Expensive** DDR5 ECC RDIMM memory is significantly more costly than consumer-grade DDR5 or DDR4. A 64GB kit can cost **$200 $300 **, making it a substantial investment for enthusiasts or gamers who may not need ECC or RDIMMs.

2. **Overkill for Gaming or General Use** If you re building a gaming PC or a general-purpose workstation, **non-ECC, unbuffered (UDIMM) DDR5 memory** (e.g., 32GB or 64GB kits) would be more cost-effective. ECC and RDIMMs are unnecessary for most consumer tasks like gaming, web browsing, or office work.

3. **Limited Consumer Motherboard Support** Most **consumer-grade motherboards** (e.g., B650, Z790, B750) support **UDIMMs only**, not RDIMMs. RDIMMs are primarily found on **workstation/server motherboards** (e.g., ASUS WS, MSI MEG, Intel C621, AMD WRX80/90). If you re building a standard gaming PC, this kit won t fit.

4. **Power Draw** DDR5 memory consumes more power than DDR4, and RDIMMs (due to their registration circuitry) draw slightly more current than UDIMMs. While the difference is minimal in most systems, it adds to the overall power consumption of high-end setups.

5. **Potential Compatibility Issues** Even on supported motherboards, some BIOS updates may be required for optimal performance. There s a small risk of compatibility issues if the motherboard or CPU doesn t fully support the exact speed/timings of the kit.

6. **No Overclocking Headroom** Unlike consumer memory, RDIMMs are typically **locked to their rated speed** (6400MHz in this case) and cannot be overclocked. Enthusiasts who enjoy pushing memory speeds may find this limiting.

7. **Wasteful for Non-Enterprise Use** If you re not running a server, workstation, or professional workload, the **ECC feature is redundant** and doesn t provide noticeable benefits in gaming or casual use.

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### **Conclusion**

- **Workstations** (video editing, 3D rendering, CAD, scientific computing)

- **Servers** (virtualization, database management, web hosting)

- **High-channel-count systems** (4-channel Intel Xeon or AMD Threadripper Pro)

- **Users who prioritize data integrity** (ECC) and stability (RDIMM)

- **Gaming PCs** (where non-ECC DDR5 UDIMM is sufficient)

- **General-purpose desktops** (where 32GB 64GB non-ECC DDR5 would suffice)

- **Budget-conscious builds** (where cost efficiency is more important than premium features)

---

### **Recommendation**

- You re building a **workstation or server** and need **ECC RDIMM support**.

- Your motherboard **explicitly supports DDR5 ECC RDIMMs** (check the manual).

- You re running **memory-intensive professional workloads** where reliability is critical.

- You re building a **gaming PC or consumer desktop** (opt for **non-ECC DDR5 UDIMM** instead).

- Your motherboard **doesn t support RDIMMs** (most consumer boards don t).

- You re on a **tight budget** (consider **32GB or 16GB kits** or **DDR4** if DDR5 isn t strictly necessary).

- **Corsair Vengeance RGB Pro 64GB (2x32GB) DDR5-6000 CL30** (non-ECC, UDIMM, more cost-effective)

- **G.Skill Flare X5 64GB (2x32GB) DDR5-6000 CL30** (high-performance, non-ECC)

- **Corsair Vengeance ECC 64GB (2x32GB) DDR5-4800 CL40** (cheaper ECC option, UDIMM)

- **Kingston ECC 64GB (2x32GB) DDR5-4800 CL40** (budget-friendly ECC)

- **Samsung M393A1K40BB1-CTD** (RDIMM, ECC, often cheaper than Corsair)

- **Micron RDIMM 64GB DDR5-4800** (reliable, enterprise-grade)

This is a **premium, specialized product** best suited for **professional and server-grade systems**. For most users, a **non-ECC DDR5 UDIMM kit** will provide better value without sacrificing performance for gaming or general use. Only purchase this if you **absolutely need ECC and RDIMM support**.

Details:

Used set of memory from my workstation build. Parting System out. CL32 Corsair 6400 4x16gb UNIX A Die DDR5 Reg ECC Rdimm.

part #: cma64gx5m4b6400c32 prices

• $335.00-$1299.00

specifications servermemor:

• brand: Corsair
• mpn: Cma64gx5m4b6400c32
• memory features: Ecc Memory
• form factor: Rdimm
• total capacity: 64 Gb
• country of origin: Taiwan
• type: 288-pin Ddr5 Rdimm
• upc: 840006690757

offer servermemor:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: May 13, 2026
• quantity: 1

seller servermemor:

• city: Vineland, New Jersey
• rating: 100.0%
• # reviews: 92

payments servermemor:

• other
• credit card: Mastercard
• wallet: Paypal

shipping servermemor:

• class: Standard
• carrier: USPS
• service: USPS Ground Advantage
• cost: $34.95
• transit: 8-13 Days
• type: Fixed

general servermemor:

• Enterprise Networking, Servers > Server Components > Server Memory RAM
• condition: Used

returns servermemor:

• policy: No Returns

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