The Age-Old Question: Does Thermal Paste Have an Expiry Date?
As I sat down to write this article, I couldn't help but think about how thermal paste, a seemingly simple component in our computers, can hold secrets that only come to light after years of being stored away. It's no secret that computer hardware just gets better with time, and I'm here to answer the age-old question: does thermal paste have an expiry date?
In my previous rig, I used a Noctua cooler, which came equipped with this very thermal paste. The rig was built in 2015, and by then, the Noctua cooler had already gained quite some popularity among enthusiasts. Fast forward to the present, and I'm still using that same thermal paste, albeit with a different CPU and motherboard.
For those who may not be familiar with thermal paste, it's a substance used to fill the microscopic gaps between the heatsink and CPU die in order to enhance heat transfer. Thermal paste is typically made from a mixture of materials such as silicones, resins, and other chemicals that provide excellent thermal conductivity.
Now, I've kept this thermal paste in a cool, dark place for quite some time now - I'd say around eight years, if not more. While it may seem like an eternity, the truth is that thermal paste doesn't really "expire" per se. However, its performance does degrade over time due to various factors.
In my experiment, I decided to measure the performance of this old thermal paste against a brand new one to see how well it holds up. To do so, I set up my test rig with an AMD Ryzen 7 5800X processor, enclosed in a Cougar Dual Face case that was set to mesh mode for optimal airflow. The torture software of choice was Cinebench R23, which is known for its demanding tests.
To minimize any differences caused by the cooler itself, I initially tested using the stock cooler. This way, if the thermal paste performed well or poorly in this setup, it would be solely due to the paste's performance rather than the cooler's. The old and new thermal pastes were then compared under the same conditions, with both having a decent cooling system that could handle the demands of Cinebench R23.
Starting out, the old thermal paste was noticeably thicker and more viscous than the newer one. However, when I spread it out, it performed just as well, if not better in some areas. The only downside was that it was harder to press down on the plunger to extract a decent amount of paste from the tube.
Using an AMD stock cooler seemed like a good idea at first, but unfortunately, the CPU proved too much for this particular cooler. Regardless of which thermal paste I used, temperatures were consistently high - around 90 degrees Celsius or so. It was clear that something had to give here.
So, what did we learn from this experiment? In short, thermal paste does indeed have a "shelf life." While it may not technically expire, its performance does degrade over time. However, if stored properly in a cool and dark place, old thermal paste can still deliver decent results.
One of the most interesting things I learned from this exercise was how well Noctua's thermal paste holds up even after eight years or so of storage. In fact, it performed almost as well as the newer paste in my tests, albeit with slightly higher temperatures overall.
Of course, not all thermal pastes are created equal, and some may degrade faster than others due to factors like oxidation or degradation over time. Nonetheless, Noctua's thermal paste has proven itself to be a reliable choice for enthusiasts looking for a hassle-free cooling solution.
In conclusion, while thermal paste may not have an exact expiry date, its performance does degrade over time. However, if stored properly in a cool and dark place, it can still deliver excellent results years later on. And that's the take-home message from this experiment - even old thermal paste can still shine when given a chance!