Computers: A Breakdown for The Layperson

Seems like if you’re looking for a new laptop or desktop computer, there’s an avalanche of choices, especially in the low budget range. In most Best Buy stores, you’ll find more than a dozen models for under $400. Almost all of them in 2019 will have 4 to 8 gigabytes of RAM and a 1 terabyte (that’s 1,000 gigabytes) hard drive. What’s the difference? What should you pick?

Well, it all depends on what you use it for. And since computers and the technology inside them are constantly changing, it wouldn’t do us too much good to tell you “if you plan to do X, buy Y”. Instead, we thought we could explain a little bit about how computers work, what all the individual parts do, and what to look for if you’re planning on getting a new one.


Think of your computer like an office. The CPU is the person you hire to do all the work.

So, think of your computer like an office.  In an office, work gets done.  The person at the desk, doing the work?  That’s your CPU.  The smarter he is, the more work he can do, and faster.  These days, CPUs have multiple cores – that’s like having more than one CPU, but inside a single CPU!  So it’s like having several people working together in the office to get even more done.  Newer CPUs are like having younger workers – they’re trained with the newest skill sets and are energetic and efficient – so they typically work even faster. Many higher-end CPUs support HyperThreading, or some equivalent, which allow each individual core to work on two tasks simultaneously, creating “virtual cores”.

Intel and AMD introduce new processors every year, sometimes with different names, sometimes with different “generations” of an existing name. It’s a bit confusing out there with the Intel Atom, Celeron, Pentium, m3, m5, m7, i3, i5, i7, i9, and Xeon; and the AMD E1, E2, A4, A6, A8, A9, A10, A12, FX, and Ryzen. So we don’t want to make recommendations on the basis of model names because we might say something now that might not be relevant later. So it’s best if you do a little of your own research into what each manufacturer is producing as budget, midrange and enthusiast processors.

Budget processors are minimum-wage workers. They get the job done, and that’s fine. But if you do a lot of things at once, you’ll want something in the midrange to enthusiast end.

Budget processors are the minimum-wage workers. They come in and get the job done, and there’s nothing wrong with that, but they typically work at their own pace and don’t always multitask well. They might be fine for you if you just do Facebook and YouTube, word processing and the like. If you do a lot of things at once, or are into video editing, gaming, or 3D modeling, you’ll want a more skilled worker, something in the midrange to enthusiast end.


4 to 8 gigabytes of RAM is enough for most people… unless you’re into huge video editing or Photoshop jobs.

The desk your CPU works at is your RAM.  RAM is temporary memory where things that are being worked on by the CPU are stored, much like a desktop.  RAM only stores information when the power is on, so when you turn off your computer, it’s instantly cleared – it’s as if the janitor decided to clear the desk after the workers leave for the day.

The bigger the desk, the more the CPU can work on simultaneously.  If you have a small desk (that is, not much RAM), then the CPU has to stop and put things in the file cabinet and take out new things to work on, which slows everything down. Most prepackaged computers come with 4 or 8 gigabytes of RAM, and this is enough for most people.

In fact, we’d only recommend 4GB as the absolute bare minimum. If you’re the type that likes to open a lot of programs at once, or browse many web pages/tabs simultaneously, you’ll want to look for 8GB. You’ll only need more than that if you plan to work on really big projects – large video editing projects, massive Photoshop jobs, and so on. The average person in 2019 rarely will make full usage of 8 gigabytes of RAM.


Your hard drive is where your personal data is permanently stored. And they don’t last forever.

The file cabinet is your hard drive, or HDD.  This is where everything is permanently stored – the operating system, which is like the employee’s handbook; and all your personal files, neatly organized into folders.

You can typically expect to go without trouble from your hard disk for around five years (or around 20,000 “power-on hours”, 2-1/4 years’ nonstop use) if they don’t get any abnormal damage (such as being dropped or bumped).  When they begin to fail, it’s as if you’ve damaged your file cabinet – maybe the rails are falling off and the workers can’t open a drawer, so important files can’t be accessed.

Or, perhaps more illustratively, it’s sort of like the file cabinet caught fire. It might start slowly, just smoldering, and things mostly seem normal, but things can quickly get out of hand and everything could be lost if you don’t deal with the situation quickly.

And an SSD?  That’s a solid state drive, which can supplement or replace a hard drive.  They have no moving parts, are battery efficient, and work very fast.  Imagine if the file cabinet had a robot inside that, as soon as you think of a file you need, hands it to you almost instantly. SSDs are a bit more expensive than hard drives (at “cost per gigabyte”), but prices are falling fast and they are becoming more common. In 2019, prices are expected to fall to the point where buying a mechanical drive for any size 1TB or less will be considered less cost-effective than buying an SSD.

You’ll need to work out what balance of performance to price is best for you, but keep in mind that the average person typically uses less than 200 GB of storage in the lifetime of their computer. If you’re the type that saves every photo or tons of music and video, however, you’ll want something bigger.

The average person uses less than 200 GB of storage in the lifetime of their computer. This means newly-inexpensive SSDs are an attractive alternative to traditional hard drives.

There’s one more option out there, called an SSHD – a hybrid hard drive that is mostly mechanical storage, but has a small SSD partition where the things you use the most are automatically put, so that things like boot-up and commonly-launched programs will move faster. We’ve noted that these seem to have an abnormally high failure rate, and when they fail, they tend to fail catastrophically, so we do not recommend their purchase.

Those are the major aspects of how your computer works, but let’s dive a little deeper into the analogy. A lot of equipment or components can be added to laptop and desktop computers.  Not all of these things can be added to all computers, but here’s a description of what a few of these things do.


There’s plenty of great options for gaming-level graphics cards at the very affordable $150-$250 price range.

A specialty graphics card, or GPU, handles video processing exclusively.  It’s almost like building an additional office that only handles graphic design. Graphics cards have their own workers, and their own desks!

There’s a lot of these, from the super-cheap $40 range (which mainly exist just to give your computer additional outputs), to the latest monster gaming cards that run about $700. There’s also rendering cards that can cost well over $2,000, but it’s extremely rare that anyone needs one of those. There’s plenty of great options for gaming at the $150 -$250 price range. If you’re looking to get into VR, $250 should get a graphics card strong enough to handle it!

The two GPU makers are Nvidia and AMD, who sell their chips to other manufacturers, called OEMs, such as MSI, eVGA, Gigabyte, and many others, who build the cards in different variations.


Don’t underestimate the importance of keeping your computer cool!

Fans, heatsinks, and water cooling devices are all different components that may be included in your cooling solution.  These things work like an A/C unit to help keep the office and the workers cool so they can do their best work.  Just like you tire quickly when you get too warm, computer components will slow if they get excessively hot. Unless you’re shopping for a specialty computer, this is a feature you don’t need to worry about too much, with the exception of dust.

A hazard some people don’t know about is if their cooling solution fails for some reason – the most common cause is dust buildup, especially in laptops.  Imagine the air filter in the office getting so clogged that the A/C stops working.  Busy workers generate a lot of heat, and if they get too hot, they might pass out from heat exhaustion – this is when your computer switches off unexpectedly.  If things get too out of hand, they could even die – “bricking” your computer.


Power supplies, whether in a desktop or laptop computer, won’t last forever. Expect to replace them eventually.

Downstairs in the utility closet is the electrical room.  This is your computer’s power supply, or PSU, which converts AC to DC electricity.  These things don’t last forever; certain components are only rated to last so long, though you should expect to get five or more years out of a good one.  When they fail, they can usually be easily replaced, much like replacing an old circuit breaker. In a desktop computer, it’s usually a large metal box inside the case (some newer models use an external power supply). On laptops, it’s a plastic brick that plugs in externally.


The motherboard lets all the components talk to each other. There are expensive models out there, but if it has the features you want, there’s no need to spend a lot of money.

The floor of the office is like the motherboard; all the components stand on it and use it to get information from one place in the office to another.  The motherboard might not last forever either – just like how floors can rot, or get scratched up or damaged from heavy foot traffic; components on a motherboard degrade over time.

Again, you should expect a good five years or more out of a decent motherboard. Laptop boards are specific to their models, but desktop motherboards come in many shapes and sizes. Typically, there’s not a need to spend a lot of money on these, but there are expensive models with high-end components designed to last longer and be more reliable. Your primary concern, though, if shopping for a desktop motherboard, is that it have all the features you want. There is likely to be a board with the features you want at a price that’s budget-friendly.



Poor build quality means a computer could fall apart even with normal use. Ask us for advice before buying.

Lastly, the walls and roof of the office are like the case, (or body, if you have a laptop).  A good PC case or laptop body, one with excellent build quality, is like a well-built office.  It will offer adequate cooling and airflow, will have sturdy walls and be attractive, and last for many years.  With laptops, this is particularly important because a poor design means it could fall apart even with normal use.  Brittle plastics, bad hinge construction, and flimsy bits are like a shoddily-built office, that collapses on top of the workers within unexpectedly.

Brands go back and forth on their build quality, so we won’t make any recommendations in this article, but if you come by the shop, we can tell you what we think of current products.


Hopefully, this has helped give you an idea of what the components in your computer are doing and what an upgrade may or may not do for you.  At The Computer Cellar, we can help you identify your needs and find a cost-effective solution for upgrades and repairs.  Why not drop in?