In our first article we covered why you might build your own PC, and in the second we covered form factors and making sure your parts fit together. Now for the fun part: picking your PC components.
This guide walks through each component, what it does, and what to look for, whether you are building a basic home office machine, a gaming rig, or a workstation for CAD or video editing. Hardware changes fast, so we rewrote this guide in October 2026 to match what we see on our bench today.
Start With What You Will Use It For
Every choice below comes back to one question: what will this computer do? Most builds land in one of three tiers. Use this as a starting point, then read the details for each of the PC components below.
| Basic (web, email, office) | Gaming / everyday power | Pro (CAD, video, 3D) | |
|---|---|---|---|
| CPU | 6 cores | 6 to 8 cores | 12 cores or more |
| RAM | 16GB DDR5 | 32GB DDR5 | 64GB DDR5 or more |
| Storage | 500GB to 1TB NVMe SSD | 1TB to 2TB NVMe SSD | 2TB NVMe SSD plus extra storage |
| Graphics | Built into the CPU | Dedicated card, 12GB+ VRAM | Dedicated card sized to your software |
| Power supply | 450 to 550W | 750 to 850W | 850W and up |
The PC Components List
CPU / Processor
The CPU is the brain of the computer. For desktops there are still two main choices: AMD and Intel. At similar price points their performance is close, so the platform you buy into matters as much as the chip itself.
Cores do the work. More cores help most when you run several heavy programs at once, or software built to use them, like video editing and 3D rendering. For basic use, a current 6-core chip is plenty. Gaming does well with 6 to 8 fast cores, since the graphics card does most of the heavy lifting. Workstations benefit from 12 cores or more.
You will also see TDP on the spec sheet. TDP is not the chip’s maximum temperature. It is roughly how much heat the CPU puts out, in watts, and it tells you how much cooling you need. A 65W chip is easy to cool. A 125W chip running flat out needs a serious cooler.
Good to know
AMD’s AM5 socket has been around since 2022, and AMD has said it will keep supporting it, which gives you room to drop in a faster chip later. Intel is expected to move to a new socket (LGA 1954) with its next generation in early 2027, so a current Intel motherboard will not take those chips.
Motherboard
The motherboard ties all your other PC components together, and it has to match your CPU. AMD Ryzen 7000 and 9000 chips use the AM5 socket. Intel Core Ultra 200 series chips use LGA 1851. Buy the CPU and motherboard together so you know they fit.
Beyond the socket, look at:
- Form factor (ATX, Micro-ATX or Mini-ITX), which decides what case it fits in
- M.2 slots for SSDs, and how many you will need
- Rear ports: USB-C, total USB count, and video outputs if you will use the CPU’s built-in graphics
- Networking: most mid-range boards now include Wi-Fi and 2.5Gb Ethernet
- Memory type: current boards use DDR5
Boards with nearly identical names can differ a lot in features and price, so check the spec sheet and a few reviews before you buy.
RAM / Memory
RAM is your computer’s short-term memory. It holds whatever the CPU is working on right now. Without enough of it, the system slows to a crawl while it shuffles data to and from the drive.
New builds use DDR5. Buy it as a matched kit of two sticks (for example, 2 x 16GB for 32GB total) so it runs in dual channel, which performs noticeably better than a single stick. Check your motherboard’s supported memory list, and turn on the memory profile in the BIOS (EXPO on AMD, XMP on Intel) so the RAM runs at its rated speed.
How much? 16GB covers basic use. 32GB is the sweet spot for gaming and most power users. 64GB or more is for CAD, video editing and virtual machines.
Heads up
When this article first ran in 2018, RAM was one of the cheapest parts in a build. Not anymore. AI data centers are buying up memory, and DDR5 now costs three to four times what it did a year ago. Budget for it, and don’t buy more capacity than you will use.
Graphics Card
The graphics card drives your display and handles 3D work. For basic use you may not need one at all. Most current CPUs have graphics built in that handle office work, web browsing and video just fine. Some models leave it out (on Intel, look for an F at the end of the model number), so check before you skip the card.
For gaming, start with the recommended specs for the games you play, then go a step above. Video memory (VRAM) matters more than it used to, and 12GB or more is a safe target for modern games at 1440p. For CAD and other professional software, check the software vendor’s list of certified cards.
The graphics card is usually the most expensive part of a gaming build, and prices have climbed along with memory. The good news is that it is one of the easiest parts to upgrade later.
Storage: SSD and HDD
An NVMe SSD is now the standard boot drive. It plugs straight into an M.2 slot on the motherboard and is several times faster than an older SATA SSD, and far faster than a spinning hard drive. Windows boots in seconds and programs open almost instantly.
PCIe 4.0 NVMe drives are the best value for most people. PCIe 5.0 drives are faster on paper, but they cost more, run hot, usually need a heatsink, and most people will not notice the difference outside of large file transfers.
Hard disk drives (HDDs) still make sense for bulk storage, like large photo and video libraries, because they cost less per terabyte. Just don’t use one as your boot drive.
Good to know
Whatever you choose, back it up. Drives fail, and an SSD can fail with no warning at all. See CPROU Cloud Backup if you want it handled for you.
Power Supply
The power supply feeds every part in the system, and it is the last place to cut corners. A cheap unit can fail and take other parts with it.
Add up your parts with an online PSU calculator, then leave 20 to 30 percent headroom. Look for:
- An 80 Plus Gold rating or better for efficiency
- A brand with a solid warranty (good units carry 7 to 10 years)
- ATX 3.0 or 3.1 support and a native 12V-2×6 connector if you are running a high-end NVIDIA card
We go deeper in How to Pick the Right Power Supply for Your Computer.
CPU Cooler
Every CPU needs a cooler. Some chips include one in the box, but many mid and high-end models do not, so check before you order.
Air coolers (a metal heatsink with a fan) are simple, quiet and reliable, and a good tower cooler handles most chips. All-in-one liquid coolers (AIOs) carry heat to a radiator mounted on the case. They make sense for hot-running high-end chips, or small cases where a big tower cooler will not fit, but they cost more and the pump is one more part that can wear out.
Make sure the cooler supports your socket and fits your case. Tall tower coolers and radiators that don’t fit are the most common build problem we see.
Case
The case holds everything, and fit matters more than looks. Before you buy, check:
- It supports your motherboard size
- Graphics card clearance (modern cards can be over 13 inches long)
- CPU cooler height, or radiator mounting if you went with an AIO
- Airflow: a mesh front panel and at least two or three fans
Front USB-C and room for cable management make the build easier to live with. Our form factors article covers sizing in detail.
Extras and Windows
Most of what used to need an add-in card is now built into the motherboard: Wi-Fi, Bluetooth, fast networking and plenty of USB. Add-in cards still make sense for specific needs, like 10Gb networking, extra drive ports or a capture card.
Don’t forget the operating system. Windows 11 requires TPM 2.0 and Secure Boot. Current motherboards support both, but you may need to turn them on in the BIOS. If you are buying a Windows license, read What Is A Computer COA first so you get a genuine one.
Want Us to Build It?
Building your own PC is rewarding, but with parts prices where they are, a mistake costs more than it used to. If you would rather have it done right the first time, our techs can help you pick PC components that fit your budget, or build the whole computer for you.
Questions about a build? Talk to our techs.
