Joybuy Insights

Buying computer hardware without making a costly mistake: how to choose PC components that suit you

Buying computer hardware seems straightforward until you discover that a graphics card won’t fit in your PC case, an NVMe SSD won’t connect to your motherboard or a gaming monitor won’t deliver the refresh rate you want. Marketing often focuses on big numbers, RGB lighting and terms such as “gaming”, while practical compatibility gets less attention.

So, keep an eye out for these three common pitfalls:

  • Impressive specifications without context: a high clock speed means little if the processor, graphics card or connection is the limiting factor.
  • Incorrect dimensions: always check the maximum graphics card length, the CPU cooler height and the space available for radiators.
  • Outdated or unsuitable connections: DDR3 memory won’t fit in a DDR5 motherboard. A high-speed monitor also needs a suitable DisplayPort or HDMI connection, and a graphics card that can handle its resolution.

The most important things to consider when buying computer hardware

1. Motherboard, processor and memory compatibility

The motherboard determines which processor and memory you can use. According to the product information, the COLORFUL BATTLE-AX B650M-E WIFI V14 uses an AMD AM5 socket and supports Ryzen 7000, 8000 and 9000 processors. The board has two DDR5 slots and supports up to 96 GB of memory.

This also means that DDR3 memory isn’t suitable. DDR3 is designed for older systems with a compatible DDR3 motherboard. The 4 GB Kingston module uses a 240-pin DIMM, runs at 1600 MT/s and requires 1.5 V, but always check your existing PC’s manual before buying.

Also look out for:

  • The correct socket type, such as AM5 or an Intel socket.
  • The memory type: DDR3, DDR4 or DDR5.
  • The maximum amount of RAM and the number of memory slots.
  • M.2 slots for an NVMe SSD.
  • The network features you want, such as Wi-Fi and Bluetooth.

2. Dimensions and power supply

A large graphics card needs enough room inside the PC case. According to the product details, the ASUS Dual GeForce RTX 5050 OC Edition measures 203 × 120.2 × 40 mm, occupies two slots and requires one 8-pin PCIe power connector. The recommended power supply is listed as 550 W.

The ASUS Prime Radeon RX 9070 XT also needs a suitable power supply and enough clearance. So, always check:

  1. The maximum graphics card length.
  2. The number of available expansion slots.
  3. The power supply connectors.
  4. Airflow around the fans.
  5. The CPU cooler dimensions.

The Corsair 3500X ARGB Midi Tower White supports graphics cards up to 410 mm long and CPU coolers up to 170 mm tall. The larger Corsair 9000D RGB AIRFLOW Full Tower Black has room for cards up to 400 mm, up to ten expansion slots and several 2.5- and 3.5-inch drive bays. Dimensions and clearances may vary between versions, so check the latest product information before installation.

3. Screen resolution, refresh rate and connections

A 144Hz gaming monitor isn’t automatically suitable for every PC. Your graphics card needs to deliver enough frames per second, and the cable must support the resolution and refresh rate you want.

For competitive games, a Full HD screen with a high refresh rate can be a practical choice. According to its product description, the KTC 24-inch gaming monitor offers 144 Hz, an IPS panel, HDMI and DisplayPort. For a sharper picture, QHD monitors are worth considering. The AOC Q27G42XNE has a resolution of 2560 × 1440 and a stated refresh rate of 180 Hz.

An ultrawide monitor is particularly suited to multitasking, simulation games and video editing. The LG 34WR50QK-B has a 21:9 aspect ratio, 3440 × 1440 pixels and a 100 Hz refresh rate. Check that your PC’s graphics card can drive this resolution via DisplayPort or HDMI.

Recommended hardware for different types of users

Suitable for: Budget-conscious beginners
Lexar NM620 512 GB NVMe SSD

Lexar NM620 - 512 GB NVMe SSD

Why it suits this user: A compact storage upgrade for a desktop or laptop with a spare M.2 slot. According to the product information, this SSD offers PCIe 3.0 x4, NVMe 1.4 and 512 GB of storage.

How this product helps you avoid the pitfall

The interface and M.2-2280 form factor are clearly stated. Just check that your motherboard supports PCIe NVMe.

Key benefit & highlights

512 GB capacity and stated read and write speeds of up to 3,300 and 2,400 MB/s respectively.

Suitable for: Shoppers looking for premium quality
Corsair 9000D RGB AIRFLOW Full Tower Black

Corsair 9000D RGB AIRFLOW Full Tower Black

Why it suits this user: This full-tower case offers plenty of room for a large gaming PC build, lots of storage and air or liquid cooling.

How this product helps you avoid the pitfall

The case explicitly lists ATX support, graphics cards up to 400 mm long and dust filters.

Key benefit & highlights

Six 2.5-inch bays, five 3.5-inch bays, two USB-C ports and support for several fan sizes.

Suitable for: Specialist needs & power users
Synology DiskStation Intel Celeron J4125 Q

Synology DiskStation Intel Celeron J4125 Q

Why it suits this user: A central NAS for backups and files, ideal for people working from home, content creators and families.

How this product helps you avoid the pitfall

The storage capacity, number of bays and network ports are clearly specified, so you don’t have to rely solely on the term “private cloud”.

Key benefit & highlights

Four bays, 48 TB of included storage according to the product information, and two 1GbE network ports.

Suitable for: Specialist needs & power users
MSI MAG 342CQRF E20 34-inch gaming monitor

MSI MAG 342CQRF E20 34-inch gaming monitor

Why it suits this user: For gamers and multitaskers who want to combine a wide UWQHD workspace with a high refresh rate.

How this product helps you avoid the pitfall

The resolution, connections, aspect ratio and refresh rate are specified separately. Check that your graphics card supports 3440 × 1440 at the refresh rate you want.

Key benefit & highlights

34 inches, UWQHD resolution, 200 Hz, Adaptive Sync and two HDMI 2.0b ports alongside DisplayPort.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and current European safety regulations.

Frequently asked questions about buying computer hardware

Which PC components should I check first?

Start with the motherboard, processor, RAM and power supply. Then check the dimensions of the graphics card and PC case. These components largely determine which upgrades will be possible later.

How long does an NVMe SSD last?

Its lifespan depends on how you use it and its stated TBW rating, which is the total number of terabytes that can be written to the SSD. Back up important files regularly. An SSD is not a substitute for a separate backup.

How much does a gaming PC cost to run each year?

That depends on its power consumption, how many hours you use it and your energy tariff. A mini PC such as the MSI Cubi NUC typically uses a different amount of power from a desktop with a powerful graphics card. Check the power supply’s stated wattage and the system’s actual consumption while gaming, rendering and idling.