Common PC Building Mistakes And How To Avoid Them

The trouble with building a PC is that it never goes as planned. A PC enthusiast will always come across one problem or another. Generally, the problems can be categorized into three groups: hardware, software, and configuration issues.

There are many mistakes that can be made while building a PC and some of them can cause serious problems. This article will teach you how to avoid these mistakes and learn the basics of building your own PC.

Building your own PC is a rewarding experience but it has its pitfalls. There are many things that can go wrong when assembling the components of a computer and some of them might not be easy to fix.

The most common mistake that people make is not reading the instructions carefully enough. This often leads to parts being mounted upside down or in the wrong orientation, which causes issues like power cables not connecting correctly and computer components overheating due to lack of space.

Buying the wrong components or Installing incompatible parts

Compatibility issues can arise from a variety of sources. There are compatibility issues that might arise from the various operating systems, hardware components, and software applications. In this case, it is important to be aware of potential compatibility issues before you make a purchase.

There are many ways to prevent compatibility issues before they happen. One way is to check the specifications of your computer components and make sure that they will work well with your operating system and application needs. Checking for compatibility ahead of time can help you avoid costly repair or replacement costs down the road.

For example, you should check the specifications of the motherboard first before buying the other components like the RAM or the CPU, make sure that the motherboard will be compatible with all parts including the GPU as well.

Also, don’t forget to buy a computer case that will fit the other components. 

Applying too much thermal paste


Thermal paste is a product that is applied between a heat sink and a processor or graphics card to improve the heat transfer from the device to the heat sink.

The application of thermal paste is generally necessary for the proper operation of a computer system. In some cases, it may be necessary to apply thermal compound by hand, but most modern cooling systems use self-applied thermal pastes that are pre-applied.

A common type of thermal compound is an aluminum oxide in silicone oil that can be spread by hand or with a syringe. Another type is a metal-based thermally conductive paste which requires application with a syringe.

A common mistake when installing a new CPU is applying too much of a thermal paste, the right way to do it is to put a pea-size paste at the center of the CPU using the syringe and just put the heatsink on top of it and start pressing gently, that way the thermal paste will be spread out and cover the surface of the CPU. 

The problem of having a Bottleneck


A computer bottleneck is a situation in which the flow of data to and from a computer is restricted by the slowest part of the system.

In order to avoid a computer bottleneck, it is important to make sure that you have the right hardware and software. For example, if you are running a machine with an outdated graphics card or a CPU with a low clock speed, then your machine will be more susceptible to a bottleneck.

Here’s a website that you can use to check whether you will have a bottleneck issue or not:

Plugging video cable into motherboard instead of graphics card


This could feel stupid but it’s a rookie mistake, I guess we all do it when we’re not focused, sometimes we forget and plug the video cable into the motherboard and not the GPU which is very frustrating when you buy an expensive graphics card and try to run a high-end game and you eventually find out about that silly mistake. 

Not having enough airflow

computer case airflow

Not having enough airflow is one of the most common mistakes that people make when they are trying to cool their computers.

Mistake no. 1: Not utilizing the case’s airflow

The air intake and exhaust vents of your computer are usually located on the back, front, or side panels. That means that you’ll never be able to use more than 50% of your computer’s cooling capacity if the vents are blocked by something like a blanket or rug sitting on top of your desk.

Mistake no. 2: Lapping up too much heat

If you have two fans in your PC cooling system, try to put one near the fan grill at the top and another near the bottom of your case. This will help keep hot air from getting trapped at any point. 

Buying a cheap PSU 

Power Supply

A computer’s power supply unit (PSU) is the component that supplies power to the system.

It converts alternating current from a power outlet into direct current to supply power to the computer’s internal components.

The PSU is the most important part of a PC because it holds all of your PC’s components together and keeps them working. If a PSU fails, then your whole system goes down. That means you could be looking at hundreds or thousands of dollars in lost hardware and data if the fault is not corrected quickly.

So buying a cheap PSU is a huge risk and must invest in a really good one from a reputable brand like Corsair, EVGA…etc. 


I hope you liked this article about the most common mistakes beginners make when building a new computer for the first time, feel free to leave a comment below if you have any questions or feedback.

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