If you built your own computer, you probably understand the importance of good air flow. You might not have picked up on this on your first attempt; perhaps your computer ran way too hot in the beginning, causing you to make some modifications. Perhaps your computer, even after tons of tweaking and loads of frustration, is still suffering from a lack of air movement. Indeed, good airflow has always been a very important part of building and designing computers.

But, airflow really is a pretty simple concept: keep the air moving through the case instead of... well... stagnating. The underlying purpose of good air flow is to keep your computer running at nominal temperatures in order to avoid any kind of malfunctions or heat-related problems, which impede optimal performance. And with concern for this idea, you can often end up putting a lot of time into assembly and maintenance just to keep your computer cool.

We need only to look at history to find evidence of the importance of good cooling. In 1979, the core of the TMI-2 nuclear reactor at Three Mile Island, Pennsylvania suffered a partial meltdown. Attributed to the malfunction of gauges that measured coolant rates through the core, the meltdown was the worst nuclear accident ever in the United States. Contamination leaked from structures into the atmosphere and the Susquehanna River, leading to massive public health concern, creating a public relations nightmare, and eventually administrative chaos. Had the gauge been functioning correctly, coolant levels would have been maintained, and the meltdown, labeled a Level 5 on the INES scale, would most likely never have occurred.

Seven years later, the worst event in the history of nuclear power took place at Unit-4 of the Chernobyl nuclear power plant in Pripyat, Ukraine. The event was widely considered to be the result of poor judgment and haphazard decisions made by the reactor crew, combined with the flawed design of the reactor itself. A series of explosions and intense heat led to the complete meltdown of Chernobyl-4. It remains the only event ever measured as Level 7 (the scale’s maximum classification). To make things worse, the plant’s design was such that the contamination was not contained to the reactor, and the radioactive cloud spread far and wide across the region. A total of 56 people have died so far from Chernobyl, most from radioactive exposure. There is now an enormous steel and concrete enclosure surrounding the reactor, and a costly cleanup effort has been going on for years. Cooling that was better designed might have greatly decreased the magnitude of the Chernobyl meltdown.

Of course, a computer overheating is probably not going to jeopardize the lives of thousands of people, nor is it going to cost millions of dollars to rectify. But, it could definitely slow down or even permanently damage your components. It’s a risky business that causes some computer enthusiasts to be overly paranoid about their system’s inner temperatures. This concern can lead users to invest in new cooling solutions, which can sometimes end up taking a pretty big chunk out of their wallets. Unfortunately, there are so many different options for cooling solutions that it can make even the most seasoned computer builder feel a bit confused and end up paying too much.