Dynamic Ram (Random Access Memory)

Dynamic Ram (Random Access Memory)

DRAM (dynamic random access memory) is a type of semiconductor memory that stores data or program code that a computer processor requires to operate.
sequentially from a starting place. RAM is located close to a computer’s processor and enables faster access to data than storage media such as hard disk drives and solid-state drives.

How does DRAM work?

Memory is made of bits of data or program code that are arranged in a two-dimensional grid. DRAM will store bits of data in what’s called storage, or memory cell, consisting of a capacitor and a transistor. The storage cells are typically organized in a rectangular configuration. When a charge is sent through a column, the transistor at the column is activated. A DRAM storage cell is dynamic, meaning that it needs to be refreshed or given a new electronic charge every few milliseconds to compensate for charge leaks from the capacitor.

The memory cells will work with other circuits that can be used to identify rows and columns, track the refresh process, instruct a cell whether or not to accept a charge, and read or restore data from a cell.
DRAM is one option of semiconductor memory that a system designer can use when building a computer. Alternative memory choices include static RAM (SRAM), electrically erasable programmable read-only memory (EEPROM), NOR flash, and NAND flash. Many systems use more than one type of memory.

Types of DRAM

Many types of DRAM can be used in a device. Some examples include the following:

  • Synchronous DRAM (SDRAM) syncs memory speeds with CPU clock speeds, letting the memory controller know the CPU clock cycle. This allows the CPU to perform more instructions at a time.
  • Rambus DRAM (RDRAM) was more widely used in the early 2000s for graphics cards.
  • Double Data Rate SDRAM (DDR SDRAM) almost doubles the bandwidth in a data rate of SDRAM by using double pinning. This process allows for data to transfer on rising and falling edges of a clock signal. It has been available in different iterations over time, including DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM.
  • Fast page mode DRAM (FPM DRAM) gives higher performance than other DRAM types by focusing on fast page access.
  • Extended data out DRAM (EDO DRAM) improves the time to read from memory on microprocessors, such as the Intel Pentium.

Major DRAM manufacturers include Samsung, Rambus, PNY Technologies, and SK Hynix.

Types of DRAM packages.

There are two main types of DRAM packaging: single inline memory module (SIMM) and dual inline memory module (DIMM). Single inline memory module packaging is considered obsolete now and was used in the 1980s to 1990s. SIMMs came in 30 and 72 pin sets and typically had 32-bit data transfer rates. DIMMs, on the other hand, are commonly used now and are dual inline — meaning that they have pins on both sides of the chip. DIMMS commonly have 168 pin connectors — or more — and support a 64-bit data transfer rate.
DRAM package types for DIMMs are set as different integrated circuit architectures. Some of these include the following:

  • Unbuffered DIMMs (UDIMMs) are commonly used on desktops and laptops. These cost less and run faster, but are less stable.
  • Registered DIMMs (RDIMMs) are commonly used with servers. These are more stable and reduce strain on a CPUs memory controller.
  • Fully buffered DIMMs (FB-DIMMs) are used in larger memory systems. These are more reliable since they can improve error detection methods and maintain signal integrity.

Upgrade your system

Computer Doctor can help you to improve your system hardware configuration like Ram, Hard Disc, CPU, Motherboard. We make sure your PC is compatible with the latest software and program configuration. Hardware upgrades can extend the life of your computer.

Computer Doctor is a computer repair company offering services such as hardware upgrade, software upgrade, virus removal, hard drive, data recovery, and networking. We service the Greater Kansas City Area including Olathe, Overland Park, Leawood, Lenexa, and Shawnee Mission Areas.

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