Everything you need to know about Crucial memory

What is a Memory Rank?

The concept of memory rank applies to all memory module form factors, though in general it tends to matter primarily on server platforms, due to the larger amounts of memory they manage.

1.35v - 1.5v Dual-Voltage DDR3 Memory

Voltage refers to the power consumed by a module. In the past, most DDR3 memory voltage ranged from 1.5 - 1.65v. More recently, dual 1.35/1.5 voltage modules came available at Crucial.com.

Understanding CPU Limitations with Memory

With modern CPUs the memory controller is built directly into the CPU itself, which means different types of CPUs may support different speeds of memory.

What are Memory Timings?

If we think of memory as a race car, the module speed (MH/z) would be like the raw horse power of the engine, and the timings would be the driver of the car.

Why Doesn't Windows® Recognize All of My Memory?

The maximum amount of memory that your system can use is limited in two ways. There is a maximum amount of memory that your computer motherboard can accept, there is also a maximum amount of memory that your operating system (OS) can accept.

ECC vs. non-ECC - What do I Have and Can I Mix?

You can determine if your system has ECC by simply counting the number of black memory chips on each module. ECC memory modules have a chip count divisible by three or five.

Overview of Memory Chip Density

The density of a memory module is determined by the small black DRAM chips that make up the memory module. The fewer chips there are on the module, the higher the density.

Upgrading a Server or Workstation? Read This First!

If you have never purchased or installed memory for a server or workstation, there are additional considerations above and beyond that of normal desktop and laptop computers to keep in mind.

Software for Diagnosing Memory Problems

The Windows® Memory Diagnostic tool is built into Windows Vista and later, is simple to use and provides a great first step for narrowing down the problem.

Differences in Memory Speed and Data Rate

Data rate and speed are often interchangeable when someone is talking about how “fast” memory is. Data rate is how many bits a module can transfer in a given time, and speed is how many bytes it can transfer.

Problems with Your New Memory?

Are you having problems with your new memory upgrade? The following guide addresses the most commonly reported errors our customers may see and their possible solutions.

Problems With Your New Apple Memory?

Are you having problems with your new Apple memory upgrade? The following guide addresses the most commonly reported errors our customers see and their possible solutions.

Virtual Memory - Settings and Suggestions

Virtual memory (also known as a page file) is essentially a block of space on your hard drive or solid state drive allocated by the OS to pretend to be RAM when your physical RAM runs short for actively running programs.

Why Does Crucial Recommend a Higher Maximum Ram Limit for My System Than the System Manufacturer?

At Crucial®, we ensure that the higher amount of RAM is rigorously tested and is backed by our compatibility guarantee.

Common Memory Specifications Overview

Here are some frequently asked questions to help you learn more acronyms associated with computers and servers to help you find the best possible upgrade.

Why Does Crucial Recommend a Higher Maximum RAM Limit for My Apple® Mac® Computer?

At Crucial, we ensure that the higher amount of RAM is rigorously tested and is backed by our compatibility guarantee.

What is XMP?

Extreme Memory Profile (XMP) speeds are higher performing, and are usually custom tweaked to the specific needs of the memory.

How Much Power Does Memory Use?

As a rule of thumb, you want to allocate around 3 watts of power for every 8GB of DDR3 or DDR4 memory. High-performance memory such as Ballistix® parts can draw more power, especially if you overclock the voltage beyond XMP settings.

Three Ways to Solve Ballistix M.O.D. Utility Issues

While rare, error messages encountered while using the Ballistix® M.O.D. Utility are usually fixed with one of a few different methods: Uninstall and reinstall, update your drivers, and update your BIOS.

If My Crucial Upgrade Is Not Listed on a Manufacturer's QVL, Is It Compatible?

A Qualified Vendor List (QVL) is a list supplied by a system or motherboard manufacturer of parts tested and confirmed by that manufacturer to work in their hardware.

What Is Dual Channel Memory?

he term "dual-channel memory" is being misused by some in the memory industry, which can mislead the consumer. The fact is there's no such thing as dual-channel memory.

Neither New Nor Old Memory Working after an Attempted Install

If your old memory is no longer functioning a likely cause is one of the following: Improper installation, power, loose internal cables, BIOS conflict

How Can I Tell If My RAM In My Mac® Computer Is Bad?

If you are having performance issues, software “hangs” or random crashes—we recommend you run a memory test.

What Is The Difference Between DDR4, DDR3, DDR2, DDR, and SDRAM?

The most significant difference between DDR and SDR is that DDR reads data on both the rising and falling edges of the clock signal, enabling a DDR memory module to transfer data twice as fast as an SDR memory module.

How Do I Know What to Order to Upgrade My Mac® System?

If you aren't sure what Mac computer model you have or what kind of memory it takes, this profile will tell you what kind of memory and how much memory is in your system currently.

Why Is My Memory Slower than Expected?

Why is my memory slower than expected?

Ballistix® Troubleshooting

If your Ballistix memory is crashing, overheating or not running as expected, view our guide to help you troubleshoot the issue.

How Can I Check How Much RAM is Installed in My Mac® Computer?

Using our Crucial® Advisor™ tool or System Scanner tool is a great way to find out how much RAM memory is installed in your Mac computer as well as displaying your upgrade options.

How Much Memory Do I Need in My Mac® Computer?

If your Mac computer is getting a little older a memory upgrade from Crucial.com can give your Mac system the boost it needs – for surprisingly little money.

How Do I Know What Kind of Memory to Purchase?

Crucial® makes finding the right upgrade easy. We offer two ways to find the right memory — the Crucial® Advisor™ tool or System Scanner tool.

Store memory chip density compatibility price

When it comes to quality, cheaper is not always better. Learn why chip density, compatibility, and pricing are related.

Memory Pricing

Why does the price of memory fluctuate? Learn how memory is priced and why prices frequently change.

reasons to buy crucial memory

Discover the three best reasons to upgrade your computer's memory to Crucial, whether you've got a laptop, desktop or are running a server.

reasons to install your own memory

Installing your own memory is easy, affordable, and doesn't require technical skills. Here are four reasons to install your own memory.

The truth about memory manufacturers

Learn the difference between true memory manufacturing companies and organizations that only assemble the modules & why it's an important distinction.

The Crucial.com 100% Compatibility Guarantee

Learn how Crucial products are 100% compatibility guarantee. Find the right part with our compatibility tool, backed up by our 45-day guarantee.

memory upgrade easy affordable

Discover how a quick and simple upgrade of your computer's memory can improve performance and breathe new life into any desktop, laptop or server.

How to determine your system's make and model

Find out why upgrading to Crucial products doesn't affect your computer's warranty and how making the change to Crucial can actually improve reliability.

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