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| ATX 460W Quiet Power Supply (ZM460B-APS ) - Quiet Power Supplies and Quiet Computer PC Parts by Zalman ATX 460W Quiet Power Supply (ZM460B-APS ) is a great Quiet Power Supplies and Quiet Computer PC Parts by Zalman. Enjoy the great selection of Quiet Power Supplies and Quiet Computer PC Parts Buy a silent PC power supply and replace the non silent pc power supply that is too loud and noisy . A poorly-designed power supply is usually the major noise generator in a PC. Inexpensive (cheap!) fans may have poorly designed blades that cause the air to oscillate at audible frequencies as it’s pulled through the fan housing, as well as inexpensive, noisy bearings. Better fans have improved ball bearings or noiseless sleeve bearings designed to rotate at high RPM with little friction, and a more efficient blade design. Unfortunately, with power supplies it’s hard for sleeve-bearing fans to move enough air, so ball bearing-based units are usually preferred. A “bonus” of ball bearing fans is that they often get noisier just before failing, whereas sleeve-bearing fans can seize up without your knowing it potentially leading to failure of the whole power supply. Audible oscillation of air can be generated as the fan pulls air past internal components, adding even more noise. Poorly-designed chassis holes in the power supply’s case often cause an audible “siren effect” as air is forced through the openings. Unlike older single-speed power supply fans, some of the better power supplies now available include temperature-sensing circuits and variable speed control so the fan rotates only as quickly as needed for proper cooling. This is good for audio applications, but make sure you check out any power supply under full load; a unit that’s quiet when idling can get very noisy when the fan’s higher speeds kick in. There are now off-the-shelf power supplies that produce in excess of 350W yet are virtually inaudible. Installing a quiet fan in the power supply can be a worthwhile upgrade, but the procedure requires a qualified technician. Power supply capacitors can retain a lethal shock, even when unplugged. Also, the fan connector may be non-standard or may require a direct solder connection to the board. There are some relatively new models of fan-less power supplies now avaiable which are very well designed and very efficient, but remember that the main source of venting for most internal case heat build-up is usually the power supply fan so you may have to install an extra case fan anyway to exhaust the internal case heat. Also, a fan-less power supply may not need a fan because it doesn’t produce a very high output, so you may not be able to expand your computer without pushing it over the edge. There are more elaborate silencing methods, such as water or oil cooling, but these options are generally impractical in the typical sound production/playback environment. When selecting a power supply, look for “sheathed” cables that supply 5V and 12V power on the ATX connector (as well as the serial ATA connectors if so equipped) to the PC’s various components. These improve airflow and don’t have gaps that can generate noise as air goes through them. I’ve had excellent results with the QTechnology line of power supplies; they’re quiet, efficient, and have sheathed cables. Some power supplies have the exhaust fan mounted on the power supply’s bottom. This helps keep fan noise inside the case rather than directly out of the back where there’s a more direct path to your ear. However, as the area at the top of the inside of the case behind the power supply gets less air flow, try to mount hard drives toward the bottom of the case to avoid inadvertently creating “heat pockets.” A standard ATX power supply may be OK for your needs, but if you want a really quiet one, you will have to look for a special “quiet” model. The Antec TruePower 430 watt PSU is a good choice. If you already have a favorite power supply that you would like to make quieter, then see my guide “How-to Silence That Noisy Power Supply” for details. Some of the newer power supplies on the market incorporate variable speed fans in an attempt to make their PSU quieter. At low power levels, the fan runs slow but at higher operational current loads, the internal PSU temperature increases causing the cooling fan to speed up and be noisy. Another one of my favorite PSUs is the PC Power & Cooling Silencer 400, which falls into this category. It is very quiet at low power levels but becomes noticeably louder at high loads. One final note on power supplies: IMHO don’t try to save a few bucks on a bargain or underrated unit, which could put your entire system at risk. A loud power supply that is poorly designed is usually a major source of noise in a PC computer. A replacement quiet power supply can do wonders on the volume level coming from your noisy computer. Poorly designed power supplies usually have poorly designed blades that cause the air to oscillate at audible frequencies as it’s pulled through the fan housing. They can also have inexpensive noisy bearings that add to the noise level. A silent power supply or quiet PC power supply has intelligently designed bearings and fan blades that can make quite a large difference on the volume level coming from your PC. Better power supply fans have ball bearings or noiseless sleeve bearings that are designed to rotate at high RPM with little friction and a more efficient blade design. A quiet computer power supply or quiet pc power supply usually has the bonus of having ball bearing fans that are noisier just before failing, thus giving you warning that they need to be replaced. Quiet atx computer power supplies are intelligently designed, reducing the siren effect when air is pulled over components when the fans circulate it. We sell silent power supplies that are in excess of 350W and are virtually inaudible. Installing a quiet fan in the power supply can reduce noise but requires some technical expertise. If you are tired of your noisy loud atx power supply, we offer quiet power supplies and silent power supplies that are fan less. Buy a quiet power supply, silent power supply, silent PC power supply, or quiet pc power supply to sleep better at night. |