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Different Types of RAM (Random Access Memory )

RAM(Random Access Memory) is a part of computer’s Main Memory which is directly accessible by CPU. RAM is used to Read and Write data into it which is accessed by CPU randomly. RAM is volatile in nature, it means if the power goes off, the stored information is lost. RAM is used to store the data that is currently processed by the CPU. Most of the programs and data that are modifiable are stored in RAM.

Integrated RAM chips are available in two form:

1. SRAM(Static RAM)
2. DRAM(Dynamic RAM)

Random-access memory, or RAM, is one of the most important components in all devices, from PCs to smartphones to game consoles. Without RAM, doing just about anything on any system would be much, much slower. On the flip side, not having enough for the application or game you’re trying to run can bring things to a crawl or even prevent them from running at all.

But what is RAM exactly? In a nutshell, it’s an extremely fast component that temporarily stores all the information a device needs right now and in the near future. Accessing information in RAM is insanely fast, unlike slower hard drives, which provide long-term storage.

Short-term memory

RAM is essentially a device’s short-term memory. It temporarily stores (remembers) everything currently running on a device, like all OS-specific services, any web browser, image editor, or game you’re playing.

RAM prevents the CPU from digging through the device’s slower storage — like a hard drive or even a solid-state drive (SSD) — every time you request a new browser tab or load a new enemy to shoot. As fast as storage is compared to drives of years gone by, they’re still far slower than RAM.

Data that resides in RAM can be read from any capable component at almost the same speed. Because it has a hard-wired connection to the device, there’s no real latency in cabling or connection.

RAM doesn’t remember everything forever, however. It’s a “volatile” technology, meaning that once it loses power, it forgets everything. That makes it perfect for handling the multitude of high-speed tasks that your device throws at it each day.

But it’s also why storage systems like hard drives and SSDs are required. Unlike RAM, they hold information when the device powers off.

Different types of RAM

RAM is a bit of a catch-all term, like “memory,” and actually covers a few different types.

“RAM” or “memory” typically refers to dynamic random access memory (DRAM), or more accurately for modern systems, synchronous dynamic random access memory (SDRAM). The terminology doesn’t really matter beyond technicalities, but it’s useful to know that the terms are relatively interchangeable colloquially.

The most common type of RAM sold today is DDR4, though older systems may use DDR3 or even DDR2. The numbers simply denote the generation of RAM, with each successive generation offering faster speeds through greater bandwidth — a higher megahertz (MHz) rating. Each generation also has physical changes, so they are not interchangeable.

Another common term, especially in the video game space, is VRAM, or video RAM. Although once a stand-alone piece of technology, VRAM is currently used to denote dedicated memory on the graphics card. For game consoles, it can also reference system memory, but in either case, it has to do with memory reserved exclusively for the GPU. It’s most commonly referred to as graphics DDR, or GDDR, usually with a generational designation, like GDDR6.

Most modern graphics cards use GDDR6. However, some graphics cards may use a different form of VRAM called High Bandwidth Memory (HBM, HBM2, and HBM2e). It has unique performance advantages although it is typically expensive, and supply issues hinder widespread adoption.