While that would make performance worse, there is a tipping point where the greater bandwidth of faster memory covers the rise in latency. It’s effectively the time between clock cycles, and as memory speed increases, timings increase as well, which increases latency. Typically, timings are listed as several numbers separated by dashes, such as 15-15-15-35 or similar. Timings are another aspect of memory that can impact RAM performance, although they are no longer as important. For example, you might see it listed as DDR4-2133 PC4-17000. The number following “PC” is simply the MHz speed multiplied by eight and then rounded. You’ll see these marketed as DDR4-2133 or similar, sometimes with the confusing “PC” label. Typical DDR4 memory runs between 2,133MHz and 3,000MHz, but some can run upwards of 4,866MHz for the fastest kits available, and DDR5 memory can go anywhere up to 7,000MHz in some kits. The memory’s total speed is referred to as bandwidth and measured in megatransfers per second, but traditionally, you’ll see memory marketed with speeds in megahertz (MHz). Like a CPU, RAM has its clock speed, which effectively controls how much data it can handle per second when combined with a few other factors. However, having massive amounts of system memory doesn’t necessarily make a PC run faster, and once you have enough, it’s better to have faster memory, than simply more of it. A PC runs not only the current application but also other services and tasks in the background. Having more than the minimum amount of RAM is essential. Anyone looking to do a lot of video editing, or heavy multi-tasking might want 32GB or even more. This is typically between four gigabytes (GB) and 16GB, though any modern PC running Windows shouldn’t really have any less than 8GB. Operating systems, games, and applications, all need a set amount of RAM to run, and even more to run well. You need to make sure you have enough RAM. Most modern graphics cards, like AMD’s new RX 7000-series, use GDDR6, but Nvidia has exclusive use of GDDR6X RAM, which can be found in its RTX 3000 and RTX 40-series graphics cards. For game consoles, it can also reference system memory, but in either case, it has to do with memory reserved exclusively for the GPU. Although once a stand-alone piece of technology, VRAM is currently used to denote dedicated memory on the graphics card. They also come in different shapes and sizes, such as being soldered directly onto the motherboard, or SODIMM (Small Outline Dual In-line Memory Module) which is still a replaceable stick, but is more compact than the DIMM-style memory sticks used on desktop PCs.Īnother common term, especially in the video game space, is VRAM (video RAM). They do, however, require less power to operate, helping to save on battery life. They offer roughly comparable performance to desktop-grade DDR memory, though not quite as fast as the best DDR5 RAM. Mobile platforms, like laptops, tablets, and smartphones, use Low-Power Double Data Rate (LPDDR) memory and are also available in various generations, including LPDDR4, and the most recent, LPDDR5X. Each generation also has physical changes and a reduction in power demand, so they are not interchangeable. The numbers denote the RAM’s generation, with each successive generation offering faster speeds through greater bandwidth - a higher megatransfers per second rating. The most common type of desktop RAM sold today is DDR4, though older systems may use DDR3 or even DDR2, and the latest systems use DDR5. The terminology doesn’t matter beyond technicalities, but it’s useful to know that the terms are relatively interchangeable colloquially. “RAM” or “memory” typically refers to dynamic random access memory (DRAM), or more accurately for modern systems, synchronous dynamic random access memory ( SDRAM). However, those storage components are necessary because they provide the longer-term storage of that data when the RAM is no longer powered. As fast as modern storage is compared to drives of years gone by, they’re still far slower than RAM. RAM prevents other components 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. Then the RAM is cleared and ready to receive new, relevant data. That information stays in the RAM, readily accessible, until you shut down the program, or restart your device. It reads information that an application or operating system might need in the near future, and stores it temporarily for quick access by the CPU, graphics card, or any other component that might need it. RAM is essentially a device’s short-term memory. USB-C charging laptops: Here’s what you need to knowīill Roberson/Digital Trends What is RAM, and what does it do? Nvidia RTX DLSS: everything you need to know Meta Quest 3: everything you need to know
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