DIMM – Dual In-Line Memory Module

Dual in-line Memory Module (DIMM) is an acronym for the Dual in-line Memory Module. It is also a type of computer memory, sometimes known as a RAM stick. It is installed in the motherboard’s memory cells in laptops, personal computers (PCs), printers, and other electronic devices.

DIMM memory chips are DRAM (Dynamic Random Access Memory), the most popular type of primary memory.

When opposed to SIMMs (single in-line memory modules), DIMMs have a 64-bit data channel, which allows DIMMs to transport data quickly. DIMM is a module that is used in place of SIMM. This memory module uses 3.3 volts, which is rather low.

Each piece of data is stored in a distinct memory cell by the dual in-line memory module.

Types of DIMM:

1. Unbuffered DIMM (UDIMM):

Unregistered Memory is another name for this type of DIMM. This is the type of DIMM that is often found in laptops and desktop computers. Unbuffered DIMMs are quicker and less expensive. It is not stable, unlike the registered DIMM. The memory controller sends instructions directly to the memory module in this form of DIMM.

2. Fully-Buffered DIMM (FB-DIMM):

FB-DIMM is utilised as main memory in systems that demand huge quantities of memory, such as servers and workstations. The FB-DIMM architecture defines the ‘Advance Memory Buffer’ (AMB), which is located between the memory module and the memory controller.

Fully buffered DIMMs employ advanced memory buffer (AMB) chips to improve reliability and retain signal integrity. It is a memory technique used to increase the density of memory systems. The AMB bus is divided into two types. The first bus is a 14-bit read/write bus, while the second is a 10-bit write/read bus.

3. Registered DIMM (RDIMM):

This DIMM is also known as a buffered DIMM. Registered DIMM is frequently used in servers and applications that demand reliability and robustness.

In most situations, it is a suitable choice for our servers. The register memory module contains a register that is located between the DRAM modules and the system’s memory controller. It is more costly since an extra circuit is required. The clock cycle is increased due to the use of buffers.

This memory module is more expensive than the unregistered memory module. As a result, computer makers mostly employed unregistered memory in laptops and desktops.

4. Load-Reduced DIMM (LRDIMM):

LRDIMM is an abbreviation for Load-Reduced Dual in-line Memory Module. The memory buffer chip is used in this type of DIMM to reduce or minimise the strain on the memory controller and to increase memory speed.
LRDIMM also aids in power consumption reduction.

5. SO-DIMM:

SODIMM (short for tiny outline dual in-line memory module) or SO-DIMM (short for small outline dual in-line memory module) is an acronym for small outline dual in-line memory module. This DIMM is available in 72-pin and 144-pin configurations. It is commonly utilised in devices with limited space, such as laptops and tablets.

6. MicroDIMM:

A micro dual in-line memory module is abbreviated as a microDIMM. It is a smaller memory module than the Small Outline DIMM.
This memory module is available in 144-pin SDRAM and 172-pin DDR configurations. This type of DIMM is most commonly seen in laptop PCs.

Difference between DIMM and SIMM:

Summary:

In this article, we take a brief look at the different types of Dual in-line Memory Modules and the uses of each of them. We also cover the differences between Dual in-line Memory Modules (DIMMs) and Single in-line Memory Modules (SIMMs).