![]() But the best move is to replace your power supply with a higher-quality alternative. If you hear this sound, you can try to dampen it. In rare cases, cheap power supplies emit a high-frequency whining or ringing known as “coil whine.” It’s a high-pitched, electronic buzz or squeal similar to the sound of cheap fluorescent lights. Rattle has a distinctive buzzing sound, and can be constant or intermittent. Because your whole case vibrates at a low amplitude (a consequence of the spinning fans), that shaking is imparted to anything with a physical connection to the machine. Rare, loose or improperly installed components can also produce noise. Never use a vacuum or cleaning solutions, or you’ll risk destroying your PC. You can use compressed air on stubborn clumps, but take care to avoid spraying droplets of liquid on sensitive components. Dirty shop floors, pet hair, and cigarette smoke compound the problem.Ĭlean dust from of your PC carefully, removing dust with a clean, lint-free cloth and diluted isopropyl alcohol. This causes them to spin more rapidly, producing more noise and sucking in more dust. If allowed to, dust will build up and clog air intakes, limiting the efficiency of your fans. You likely can’t remove every obstruction from the front of your machine, but do your best to limit them if possible.Ĭheck for dust bunnies inside and outside your machine. This obstruction produces turbulent air, which is much louder than smoothly flowing air. Depending on the configuration of your case, there might be something dense like a hard drive tray in front of your intakes. In most cases, you’ll want to ingest air from the front of the PC and exhaust it out the back. To keep things quiet, make sure there’s a mostly-unobstructed path for air to follow through your machine. ![]() In fact, most of the sound you hear from a fan is the sound of turbulent air flowing around obstructions. When air flows around an object, its flow becomes more turbulent. Because sound follows a logarithmic scale, the additional fans produce minimal audible noise at low speeds. With more fans, each individual fan spins more slowly, producing less noise. Installing additional fans may also reduce noise, ironically. Some motherboards can also control fan speed, like Asus’ Fan Xpert. Most pre-built fan curves run your fans faster than necessary, producing needless noise.įan control software like SpeedFan (Windows), smcFanControl (macOS), or lm-sensors (Linux) gives you direct control over your fan speed curve. Slowing down the fans will let components get hotter, but the risk is low within standard operating temperatures. ![]() The fan curve controls how fast your fans spins for a given sensor’s temperature. If you already have PWM fans installed, use fan control software to set a more conservative fan curve. The lower the dBA value, the quieter the fan. Look for a sound ratings below 20 dBA, which is about as loud as a calm room. Shop for purpose-built quiet fans from brands like be quiet! and Nocturna. ![]() Unlike the fixed-speed fans found on cheaper PCs, PWM fans dynamically adjust their speed in response PC’s temperature, spinning more slowly (and more quietly) when the system is cool. For quieter operation, use fans with pulse-width modulation, or PWM. This provides better cooling, and more noise. ![]() The faster a fan spins, the more air it moves. ![]()
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