Samsung M393A1G40EB1-CRC a similar memory module for older systems DDR3 equivalent

 The **Samsung M393A1G40EB1-CRC** is a high-performance **8GB DDR4-2400MHz ECC Registered RDIMM** memory module designed for servers and workstations. If you're looking for a **DDR3 equivalent** or a similar memory module for older systems, here are some suggestions based on compatibility, performance, and use case:

### **DDR3 Equivalent Suggestions**

1. **Samsung M393B1K70DH0-YH9**  

   - **Capacity**: 8GB  

   - **Type**: DDR3-1333MHz PC3-10600R  

   - **ECC**: Yes, ECC Registered  

   - **Voltage**: 1.35V or 1.5V  

   - **Pin Count**: 240-Pin RDIMM  

   - **Use Case**: Ideal for older servers like Dell PowerEdge R620/R720, HP ProLiant Gen8, and similar systems.  

2. **Micron MT36KSF1G72PZ-1G4E1HF**  

   - **Capacity**: 8GB  

   - **Type**: DDR3-1333MHz PC3-10600R  

   - **ECC**: Yes, ECC Registered  

   - **Voltage**: 1.35V or 1.5V  

   - **Pin Count**: 240-Pin RDIMM  

   - **Use Case**: A reliable option for enterprise servers requiring stable performance and error correction.  

3. **Hynix HMT31GR7BFR4C-H9**  

   - **Capacity**: 8GB  

   - **Type**: DDR3-1333MHz PC3-10600R  

   - **ECC**: Yes, ECC Registered  

   - **Voltage**: 1.35V or 1.5V  

   - **Pin Count**: 240-Pin RDIMM  

   - **Use Case**: Compatible with a wide range of servers and workstations, offering excellent value for older systems.  

4. **Kingston KVR13R9S8/8**  

   - **Capacity**: 8GB  

   - **Type**: DDR3-1333MHz PC3-10600R  

   - **ECC**: Yes, ECC Registered  

   - **Voltage**: 1.5V  

   - **Pin Count**: 240-Pin RDIMM  

   - **Use Case**: A cost-effective option for upgrading older servers without breaking the bank.  

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### **Key Differences Between DDR3 and DDR4**  

- **Speed**: DDR4 (e.g., 2400MHz) is faster than DDR3 (e.g., 1333MHz).  

- **Voltage**: DDR4 operates at a lower voltage (1.2V) compared to DDR3 (1.35V or 1.5V), making it more energy-efficient.  

- **Pin Count**: DDR4 uses 288 pins, while DDR3 uses 240 pins.  

- **ECC Support**: Both DDR3 and DDR4 offer ECC variants, but DDR4 provides better performance and scalability for modern systems.  

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### **When to Choose DDR3 Over DDR4**  

- If you're working with older server models (e.g., Dell PowerEdge R620/R720, HP ProLiant Gen8, or IBM System x) that only support DDR3.  

- If you're on a tight budget and need a cost-effective upgrade for legacy systems.  

- If your workload doesn’t require the higher speeds and efficiency of DDR4.  

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### **Where to Buy**  

You can find these DDR3 memory modules on trusted platforms like:  

- **ETechBuy**: [ETechBuy DDR3 Memory](https://www.etechbuy.com)  

- **Newegg**: [Newegg DDR3 Memory](https://www.newegg.com)  

- **Amazon**: [Amazon DDR3 Memory](https://www.amazon.com)  

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### **Conclusion**  

While the **Samsung M393A1G40EB1-CRC DDR4 module** is a fantastic choice for modern servers, DDR3 modules like the **Samsung M393B1K70DH0-YH9** or **Micron MT36KSF1G72PZ-1G4E1HF** are excellent alternatives for older systems. Always check your server’s compatibility before making a purchase, and consider upgrading to DDR4 if your hardware supports it for better performance and efficiency.  

Let me know if you need further assistance!