Thermal Paste and Your PC: Does Old Paste Really Degrade Performance?

Graeme Hughes
February 23, 2025
Hardware, Troubleshooting, Repair and Upgrades

What You’ll Learn In This Video

Thermal paste might be a small component in your PC build or maintenance routine, but it plays a crucial role in keeping your CPU cool and running efficiently. In this video, we dive deep into what thermal paste is, what it does, why it’s essential for your computer’s performance, and we walk you through applying thermal paste in an older PC.

Chapters in This Video:

00:00 – Intro
00:31 – What Is Thermal Paste and How Is It Used?
04:42 – Testing the Thermal Paste In An 8-Year-Old Dell
08:12 – Changing Thermal Paste – Step-By-Step
16:29 – How Big a Difference Did New Thermal Paste Make to This Old PC?
17:31 – Final Thoughts & Tips

What is Thermal Paste?

Thermal paste (also known as thermal compound or TIM) is a heat-conductive substance that helps transfer heat from your CPU to your heatsink, preventing overheating and ensuring stable performance.

How Often Should You Change Thermal Paste?

Most manufacturers recommend replacing thermal paste every 2-5 years, depending on factors like usage, temperature, and the quality of the paste. But how accurate is that recommendation? Does old thermal paste significantly change your PCs cooling performance?

Watch as We Apply Thermal Paste to an 8-Year-Old Dell!

In this segment, we walk you through the process of cleaning off old thermal paste and applying a fresh layer on an aging Dell desktop CPU.

Products In This Video:

(Affiliate Links – I may receive compensation for purchases made via these links.)

Amazon Refurbished PCs – Amazon is my favorite place for refurbished PCs given their excellent return policies and warranties. I always check to make sure my purchases are marked “Ships From Amazon” so I know what to expect.

Check out the Amazon Renewed Store here: https://amzn.to/3UlafUg

Maxtor CTG 8 Thermal Paste:

Amazon: https://amzn.to/4wHwFNT