SAMSUNG M393A4K0EB3-CWEBY Ecc Rdimm 32GB DDR4 2RX4 3200MHZ M393A4K40EB3-CWE

( Brand: Samsung ), ( Manufacturer Part Number: M393A4K0EB3-CWEBY ), ( Form Factor: Rdimm ), ( Type: Ddr4 Sdram ), ( Total Capacity: 32 Gb ), ( Bus Speed: Pc4-25600 ), ( Country Of Origin: China )

Review SAMSUNG Ddr4 2rx4 3200mhz Ecc Rdimm

The **Samsung M393A4K0EB3-CWEBY (32GB) DDR4 RDIMM** and its complementary **M393A4K40EB3-CWEBY (32GB) variant** represent the pinnacle of high-performance, enterprise-grade memory designed for demanding workloads in servers, data centers, and high-end workstations. These **ECC (Error-Correcting Code) Registered Dual In-Line Memory Modules (RDIMMs)** are engineered to deliver unparalleled reliability, speed, and efficiency, making them an ideal choice for applications requiring fault tolerance, low latency, and sustained performance under heavy loads. Manufactured by Samsung, a leader in semiconductor technology, these modules adhere to strict industry standards, ensuring seamless compatibility with a wide range of compatible server platforms, including those from Dell, HP, Lenovo, and other major vendors.

The **M393A4K0EB3-CWEBY** and **M393A4K40EB3-CWEBY** operate at an impressive **3200MHz clock speed**, significantly outperforming standard DDR4 modules and enabling faster data transfer rates, reduced latency, and enhanced system responsiveness. Each module is configured as a **2Rx4 (2-rank, 4-bank) architecture**, which optimizes memory bandwidth and throughput while maintaining efficient power consumption. The **32GB capacity** of each module provides substantial memory expansion options, allowing for the deployment of large-scale virtualization environments, high-performance computing clusters, or memory-intensive applications like database management systems, AI/ML workloads, and real-time analytics.

One of the most critical features of these modules is their **ECC capability**, which actively detects and corrects single-bit errors in memory, drastically reducing the risk of data corruption and system crashes. This is particularly vital in mission-critical environments where uptime and data integrity are non-negotiable. Additionally, the **registered (RDIMM) design** incorporates a buffer chip to manage data flow between the memory module and the system s memory controller, further stabilizing performance and reducing the likelihood of timing-related issues. This makes these modules well-suited for platforms with strict memory timing requirements or those utilizing high-speed memory channels.

The **CWEBY variant** signifies that these modules are part of Samsung s **C-Web (Corporate Web) series**, which is optimized for enterprise and data center applications. These modules are built with **low-power, high-density DRAM chips**, ensuring efficient thermal management and extended operational lifespans even under sustained heavy usage. The **CWEBY designation** also implies compliance with industry-leading reliability standards, including rigorous testing for endurance, stability, and resistance to environmental stressors such as temperature fluctuations and voltage variations.

For system integrators and IT administrators, the **M393A4K0EB3-CWEBY** and **M393A4K40EB3-CWEBY** offer unmatched flexibility. They are designed to work in **DIMM slots that support DDR4-3200MHz RDIMM configurations**, making them compatible with a broad spectrum of modern servers equipped with Intel Xeon or AMD EPYC processors. Whether deployed in a **2-socket or 4-socket server configuration**, these modules ensure consistent performance across all memory channels, eliminating bottlenecks and maximizing computational efficiency.

Beyond raw performance, these modules contribute to **cost savings in the long run** by minimizing downtime due to memory errors and reducing the need for frequent hardware replacements. Their robust construction and Samsung s reputation for quality assurance provide peace of mind for organizations prioritizing both performance and reliability. Whether deployed in a **cloud infrastructure, financial trading system, or scientific computing environment**, the **Samsung M393A4K0EB3-CWEBY and M393A4K40EB3-CWEBY** modules deliver a seamless blend of speed, accuracy, and endurance, making them a cornerstone of modern high-performance computing architectures.

### **Pros and Cons of buying a Samsung M393A4K0EB3-CWE (32GB DDR4 2Rx4 3200MHz ECC RDIMM) and M393A4K40EB3-CWE (64GB DDR4 2Rx4 3200MHz ECC RDIMM)**

1. **High Performance and Speed**

- Both modules operate at **3200MHz**, which is faster than standard DDR4-2400 or DDR4-2666 kits, providing better latency and throughput for memory-intensive workloads (e.g., servers, workstations, or high-end gaming PCs).

- The **low CAS latency (CL16)** further enhances performance in latency-sensitive applications.

2. **ECC Memory Support**

- **Error-Correcting Code (ECC)** memory is crucial for data integrity, reducing the risk of silent data corruption in servers, workstations, and professional applications (e.g., databases, virtualization, CAD, or financial modeling).

- Ideal for **enterprise, business, or mission-critical systems** where reliability is non-negotiable.

3. **Registered (RDIMM) Design**

- **RDIMM (Registered DIMM)** modules are designed for **multi-channel server motherboards**, reducing signal interference and improving stability in high-channel-count systems (e.g., 4x, 8x, or 16x CPU configurations).

- Better suited for **servers, workstations, and high-end desktops** than unbuffered (UDIMM) or LRDIMM variants.

4. **Compatibility with Modern Platforms**

- These modules are designed for **Intel Xeon, AMD EPYC, and high-end Intel Core/Xeon workstation motherboards** (e.g., Intel 400/800 series, AMD TR4/SP3).

- Works well with **DDR4-3200-compatible CPUs** (e.g., Intel Xeon Scalable, AMD Ryzen Threadripper Pro, or high-end Core i9/i7).

5. **Reliability and Longevity**

- Samsung is a **trusted manufacturer** with a strong reputation for memory stability and durability.

- These modules are **industrial-grade**, making them suitable for **24/7 server deployments**.

6. **Scalability**

- Available in **32GB (2Rx4) and 64GB (2Rx4)** configurations, allowing for **flexible memory upgrades** in systems requiring higher capacity.

- Can be paired with other identical modules for **dual-channel or multi-channel setups** (depending on motherboard support).

7. **Low Power Consumption (Relative to Speed)**

- Despite the high clock speed, these modules are **efficient** compared to older DDR3 or even some DDR4-3600 variants, making them a good balance of performance and power draw.

---

1. **High Cost**

- **ECC RDIMM modules are significantly more expensive** than standard DDR4 UDIMMs, especially at 3200MHz.

- The **32GB kit ( $100 $150) and 64GB kit ( $200 $300)** may not be cost-effective for **consumer-grade PCs** or budget builds.

- Pricing can vary based on **bulk discounts, supplier, and market demand**.

2. **Limited Consumer Use Case**

- **Not ideal for gaming PCs** most gamers use **UDIMM (unbuffered) memory** for better price-to-performance in single-channel or dual-channel setups.

- **Overkill for office/workstation PCs** running standard applications (e.g., Microsoft Office, web browsing) where ECC and high speeds are unnecessary.

3. **Motherboard and CPU Compatibility Requirements**

- **Only works on motherboards with RDIMM support** (most consumer motherboards use UDIMM or LRDIMM).

- **Not compatible with AMD Ryzen (non-Threadripper) or Intel mainstream desktop CPUs** (e.g., Core i5/i7/i9, unless it s a high-end workstation chip like Xeon W or Threadripper Pro).

- **DDR4-3200 may not be fully utilized** on some platforms that default to lower speeds (check motherboard QVL for optimal settings).

4. **Higher Latency in Some Configurations**

- While **CL16 is decent**, some **DDR4-3600/4000 modules** (especially UDIMMs) offer slightly better latency in gaming or single-threaded tasks.

- **Registered memory can introduce slight latency penalties** in non-server workloads due to the register buffer.

5. **Waste of Capacity in Small Systems**

- A **32GB or 64GB RDIMM kit is excessive** for **single-socket workstations or small servers** where 16GB or 32GB UDIMMs would suffice.

- **Cannot be mixed with UDIMMs** most systems require **all RDIMMs in a channel** for stability.

6. **Potential Overkill for Non-Server Workloads**

- If you re not running **virtualization, databases, or heavy scientific computing**, the **performance gains may not justify the cost**.

- **Gaming, content creation (video editing), and general productivity** often see **marginal improvements** from ECC RDIMMs compared to high-end UDIMMs.

7. **Limited Availability Outside Server/Workstation Markets**

- These modules are **not commonly stocked in mainstream retailers** (Best Buy, Newegg, Amazon) but are **server-focused**, meaning you may need to **buy from specialized suppliers** (e.g., Amazon Business, server vendors, or memory distributors).

---

**Servers (physical/virtualized)**

**High-end workstations (CAD, rendering, financial modeling, databases)**

**Mission-critical applications requiring data integrity**

**Multi-socket or high-channel-count systems (Intel Xeon, AMD EPYC)**

**Gaming PCs** (UDIMM modules are better value)

**Budget workstations** (unless ECC is mandatory)

**Consumer-grade motherboards** (most don t support RDIMMs)

**Systems where 32GB is unnecessary** (e.g., single-user office PCs)

---

- You are building a **server, workstation, or high-end professional system** where **ECC, reliability, and high memory speeds** are critical.

- Your **motherboard supports RDIMMs** (check QVL for compatibility).

- You need **32GB or 64GB in a registered configuration** (e.g., dual-socket Xeon, AMD EPYC, or Threadripper Pro).

- You prioritize **long-term stability and data integrity** over raw gaming performance.

- You are building a **gaming PC, budget workstation, or consumer-grade system**.

- Your **motherboard only supports UDIMMs** (most non-server boards do).

- You don t need **ECC memory** (UDIMMs will save you money).

- You can achieve **similar performance with slightly slower but cheaper UDIMMs** (e.g., 3200MHz UDIMMs for gaming).

- **For Gaming/Workstations:** Samsung **M378A1K43EB2CTD** (3200MHz DDR4 UDIMM) or **Corsair Vengeance LPX** (if ECC isn t needed).

- **For Servers/Workstations (Lower Cost):** **Micron/Dell ECC RDIMMs** (often cheaper in bulk).

- **For AMD Threadripper Pro:** **Corsair Dominator Platinum** (UDIMM) or **Samsung M393A4G40EB2CTD** (if RDIMM is required).

These modules are **one of the best ECC RDIMM options for high-performance server and workstation builds**, but their **high cost and niche compatibility** make them **unnecessary for most consumer applications**. If you re in the market for **reliable, high-speed memory in a server or professional workstation**, they are a **solid investment**. Otherwise, **UDIMMs or lower-capacity RDIMMs may be a better fit**.

Details:

Capacity: 32GB. These modules were recently pulled from a decommissioned, climate-controlled server environment and have been fully tested for functionality. RAM is Pre-Owned. Shipping Packaging.

Speed: DDR4-3200 PC4-25600AA. Model: M393A4K40EB3-CWEBY. 1-3 Sticks: Individually placed in anti-static shielding and securely bubble-wrapped before being boxed. Type: RDIMM Registered ECC.

part #: m393a4k0eb3 prices

• $319.98-$517.27

specifications servermemor:

• brand: Samsung
• mpn: M393a4k0eb3-cweby
• form factor: Rdimm
• type: Ddr4 Sdram
• total capacity: 32 Gb
• bus speed: Pc4-25600
• country of origin: China

shipping servermemor:

• class: Standard, Expedited, One-day
• cost: $0.00
• transit: 5-9 Days
• carrier: USPS, UPS
• type: Fixed
• service: USPS Ground Advantage, UPS 2nd Day Air, UPS Next Day Air

general servermemor:

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

seller servermemor:

• # reviews: 1212
• rating: 100.0%
• city: San Francisco, California

offer servermemor:

• started: April 9, 2026
• quantity: 6
• availability: In Stock
• options: Ship-to-home
• sold: 0

payments servermemor:

• credit card: Diners-club
• wallet: Apple-pay
• other

returns servermemor:

• policy: Returns Accepted
• method: Money back
• paid by: Seller
• time: 30 Days

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