Crucial

Crucial CT4G3ERSDD8186D 4GB DDR3 1866 RDIMM Memory

Reliable Memory for Enhanced Performance The Crucial CT4G3ERSDD8186D is a 4GB DDR3 memory module designed to enhance the performance of your server or workstation. With a speed of 1866 MT/s, this RDIMM ensures smooth and efficient operation for demanding applications. Specifications: Bran...

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

Reliable Memory for Enhanced Performance

The Crucial CT4G3ERSDD8186D is a 4GB DDR3 memory module designed to enhance the performance of your server or workstation. With a speed of 1866 MT/s, this RDIMM ensures smooth and efficient operation for demanding applications.

Specifications:

  • Brand: Crucial
  • Model: CT4G3ERSDD8186D
  • Capacity: 4GB
  • Memory Type: DDR3
  • Speed: 1866 MT/s (PC3-14900)
  • Form Factor: RDIMM
  • Pin Count: 240P

Key Features

4GB DDR3 1866 MST/s (PC3-14900) Dr x8 RDIMM 240P

Design that delivers high availability, scalability, and for maximum flexibility and price/performance

Made in United States

Specifications

Brand
Crucial
Model
CT4G3ERSDD8186D
Capacity
4GB
Memory Type
DDR3
Speed
1866 MT/s (PC3-14900)
Form Factor
RDIMM
Pin Count
240P
Origin
Made in United States

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Pros & Cons

👍 Pros

  • Offers 4GB of DDR3 1866 MT/s (PC3-14900) memory, providing a performance upgrade for compatible systems
  • Designed to deliver high availability, scalability, and flexibility for improved price/performance
  • Features RDIMM (Registered DIMM) design, enhancing stability and reliability in server or workstation environments
  • Manufactured in the United States, potentially indicating adherence to specific quality standards
  • Supports 240-pin systems, ensuring compatibility with motherboards that use this standard

👎 Cons

  • The 4GB capacity might be considered low for modern, memory-intensive applications or multi-tasking workloads
  • DDR3 technology is older, limiting compatibility to systems that specifically use DDR3 RAM
  • The 1866 MT/s speed, while good for DDR3, is slower than current generation DDR4 and DDR5 memory modules
  • Being an RDIMM, it is generally not compatible with standard desktop motherboards that require unbuffered memory (UDIMM)
  • No information provided about latency timings (e.g., CL value), which can impact memory performance

Frequently Asked Questions

This is a 4GB DDR3 1866 MT/s (PC3-14900) RDIMM memory module.
RDIMM stands for Registered DIMM, which includes a register between the DRAM modules and the memory controller to improve stability and scalability, typically used in servers and workstations.
This Crucial memory module has a capacity of 4GB.
This Crucial CT4G3ERSDD8186D memory module is made in the United States.
No, as an RDIMM (Registered DIMM), this memory is primarily designed for servers and high-end workstations and is generally not compatible with standard consumer desktop motherboards which require unbuffered (UDIMM) memory.