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Cooling The Silent PC

When it comes to cooling a typical, noisy PC, things are usually very simple. Most manufacturers just add in a few fast moving, noisy fans, to force enough air through the computer to keep it cool. Trying to keep a Silent PC cool can be a little more difficult, and may be intimidating to many people at first.

Figuring out how to cool a Silent PC can be fairly simple, as long as you start with the right cooling component, and a good plan. It's all about balance...a balance between the airflow required, versus the noise generated by cooling fans. In general, the hotter any given component gets, the harder the PC is going to have to work to provide the same cooling performance. So, a PC with higher temperatures will have to get noisier in order to stay cool, unless proper steps are taken to keep the PC both cool AND quiet. To help you figure out the best components and the best plan to cool a Silent PC, we've put together our best advice into one article.

#1 Monitor the Temperatures Of Your Silent PC

An invaluable tool when building a Silent PC is your motherboard's hardware monitoring. Hardware monitoring allows you to know the temperatures of key components in your PC, like the CPU or Northbridge, so you can adjust fan speeds accordingly. Most motherboards come with a hardware monitoring program that can be accessed from your operating system so you can see your system temperatures while the PC is up and running under load. Most motherboards will have this hardware monitoring software included on the motherboard CD. However, if your particular motherboard does not have monitoring software, or you can't find it, HWmonitor is a very good generic PC monitoring tool as well.

#2 Create a Silent Wind Tunnel In Your Silent PC

Once you know if your key computer components are cool enough, the next thing you need to make sure of is getting a good supply of cool airflow going through the machine over any of the hotter components.

Using the diagram, you can see how we typically set up the airflow in a Silent PC, with the cool air coming from the intake fan at the front of the case, flowing over the components to cool them off, and then exhausting the hot air out the back of your machine. Silent PC Airflow

Using vented PCI slot covers and leaving open slots or drive bays next to components that tend to run hotter is an excellent way to reduce heat build up inside of a Silent PC. Having a few open ventilation slots next to a video card will allow cool air to run past your video card heatsink, and exhaust hot air out of the back or top of your machine.

Choosing the placement of the silent case fan in the Silent PC is a balance. Placing an intake fan at the very front of the case can lead to a slightly more noticeable noise level. So, you might choose to instead place your fan in the back of your PC case, close to a video card or memory module. This cooling scenario is going to reduce your noise level, and get more direct cooling to your video card.

#3 Silent PCs Need Adequate Heatsinks

Using the fans that come with your case, or using your stock CPU cooler will not work if you are trying to make your PC silent, and unfortunately simply slowing down your stock components will not work either, as they will overheat with a slower moving fan. Large aftermarket heatsinks help solve this issue. We typically use products like the Zalman CNPS10X Flex along with a Nexus 120mm B/W Case Fan to silently cool our CPUs.

#4 Use High Quality Thermal Compound

An important component of superior cooling of the Silent PC is the use of high quality thermal compound when attaching heatsinks. For improved CPU cooling and performance, we recommend Arctic Silver 5, which alone can drop your CPU temperature from 3-12 degrees Celsius when switching from standard thermal compound. Since creating a silent PC involves using large, efficient heatsinks and silent, slow-moving fans as your only source of cooling, proper installation of your CPU cooler and the use of high-quality thermal compound is imperative.

#5 Organize Your Cables For a Cooler PC

Silent PCs Need Organized Cables

When building a Silent PC, make sure all wires and cables are routed and bunched out of the way so as to not block airflow. Use cable ties like the velcro cable ties, or standard zip-ties to bunch cables out of the path of the airflow. If you have a floppy drive, we recommend rounded cables for your floppy cables since they not only look cool, but are easier to hide out of the way of your case's airflow path.

#6 Keep Dust To a Minimum For A Cooler Silent PC

Dust buildup is one of the most common things that can lead to overheating, lack of quality airflow, and eventually component failure in a PC. When dust begins to build up over components, it starts to act like an insulating barrier, keeping the heat locked in close to the electronic components, which causes increased damage over time. Since the level of airflow in a Silent PC is lower, it is is even more important to take your PC outside periodically, open it up and blow out the built up dust using a compressed can of air specifically made for electronics, like Dust-off.

Electronics duster air (canned air) is the easiest and safest way to clean dust out of a computer. Using a vacuum can sometimes cause a static build-up and can lead to a static shock, possibly causing one or more of your components to fail. Air compressors often times have moisture in them that can cause damage to components as well. A monthly cleaning is going to be the best way to remove excess dust from the inside of your machine, and will keep your Silent PC running for as long as possible.

The use of dust filters can help keep dust build-up to a minimum, but has both positive and negative effects on PC performance. The obvious reason for using dust filters are that they keep dust from entering the PC. Unfortunately, dust filters don't filter out 100% of the dust and will, eventually, like the rest of your computer, need to be cleaned of dust build-up to keep running smoothly. Dust filters will help keep your machine clean for a longer period of time and if you live in a dusty environment, then we definitely recommended them to you.

The downside of using dust filters is that they will impede the movement of air. With reduced airflow, you will get slightly hotter components (everything else being equal), versus PCs that don't use dust filters. In the end, the use of dust filters needs to be determined by how much dust is in your area, and how hot the components that you're using are getting. A lower end machine will usually have minimal problems using dust filters since the machine is not likely going to overheat. A high end gaming machine will have a larger amount of heat in the first place, and overheating is much more likely.

#7 Find a Cool Place For Your Silent Hard Drive

Try and leave a bay next to your silent hard drive open to allow for better airflow and better cooling around these heat producing components, or else use a Smart Drive Enclosure to safely silence your hard drive (the Smart Drive reduce temperatures slightly).

#8 Choose Quiet Video Card Options

Choose a fanless video card with an adequate heatsink, or else choose a silent aftermarket Video Heatsink.

Adding an aftermarket Video Cooler is only encouraged if you cannot find a fanless version of your specific card. Typically, higher end cards don't have fanless models available. In general, we recommend using a video card that is sold as fanless straight from the manufacturer, that way you don't have to void the manufacturer's warranty. At this point, most of the lower-end to medium-range video cards have special fanless versions available on the market.

For higher end, or gaming video cards you will usually end up having to use a Zalman Cooler like the VF3000A, or use a water cooled system, like we use in our Water-cooled Gaming PC.

Some of the benefits of using an aftermarket cooler on a video card are that the replacement cooler is usually going to be a larger heatsink compared to the stock cooler, and are able to run much quieter because they are much more efficient at cooling, and can use slower fans without overheating since the larger heatsink is going to increase the amount of heat dissipation from the GPU and other hot areas of the card, improving the overall quietness, performance, and temperature of the video card.

#9 Consider a Memory Heatsink

Memory heatsinks are going to greatly increase the amount of heat that gets moved away from memory sticks themselves. Normally, memory modules don't produce that much heat by on their own, but, a significant amount of heat can be generated by six sticks of memory together. Now that there are commonly motherboards that have triple channel memory, memory heat spreaders are becoming more and more important to the longevity of your memory modules.

#10 Choose the Quietest PC Parts

Silent Hard Drives

By choosing the best quality silent PC parts you can afford, your system will be quieter to begin with without overheating components.

Use a silent hard drive, or preferably an SSD (Solid State Disk). Our Quiet Hard Drive Section has our current top picks for quiet hard drives, as well as our completely silent SSDs. An SSD drive produces little noticeable heat and no noise. This can be accomplished because there are no moving parts inside of the device. Because everything is solid state, a significant boost in performance is always expected over a standard mechanical drive.

You might also consider enclosing a hard drive in a hard drive enclosure in order to keep your hard drive cool and quiet. A Smart Drive Neo hard drive enclosure is going to make your hard drive run cooler because it acts like a giant heatsink, removing excess heat where it can, as well as dampening the noise from the drive directly. One very important thing to take into account when looking at hard drive enclosures is that they will only fit into 5.25 inch drive bays instead of the 3.25 inch drive bays like standard hard drives do. Make sure to keep an empty drive bay on at least one side of the enclosure, so it can properly dissipate the heat generated from the heatsinks.

Silent Case Fans

In most standard computer cases, the manufacturer will simply include a noisy high RPM fan that moves a lot of air. When we build a Quiet PC, Endpcnoise.com typically will replace the stock case fan with the appropriate Nexus case fan, as well as add any extra quiet case fans that can be added. Because quiet case fans move less air individually than standard fans you may have to add in an extra case fan to make up for the reduced airflow in order to keep the noise level down and still cool the case properly.

Quiet Power Supplies

Every single quiet power supply we carry has been selected for its absolute superiority in the quiet power supply market. Our quiet power supplies are so quiet, that, properly installed, you will have to put your ear up to your power supply to even hear that it is on. Each quiet power supply has been chosen because it is extremely quiet, stable, and reliable. In fact, we use every quiet power supply we sell in the Quiet PCs we build. Our quiet power supplies are not only truly silent, but provide for ample airflow and long lasting life.

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