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there are two main types of annoying fan noise there's the guy pulling for the

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visitors when you're trying to watch the darn sports ball game

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and the other of course is the roar of your computer's cooling fans

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nearly every desktop and laptop has at least one fan to keep its temperatures

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down and if you've got a poorly optimized cooling solution

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any kind of load on your machine can make it sound like you've got a jet

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engine taking off on your desk now obviously cooling is important it is

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inevitable that computer components will generate waste heat you can learn more

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about why up here but is there a better

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way to get rid of it than using noisy fans or complicated water cooling setups

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which by the way aren't always silent either well there are a couple of common

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types of computers that actually don't use fans at all tablets and smartphones

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it's pretty intuitive that it wouldn't be practical to strap a fan or a water

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cooler to your phone then carry it around in your pocket but the fact is

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that tablets and smartphones are basically just small computers that can

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do most of the things commonly done on a desktop or laptop so how do they get

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away with it the secret sauce here is called reduced instruction set computing

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or risk you see the CPU at the very

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heart of your phone or tablet is built with a very different underlying

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architecture than your desktop at home traditional cpus are designed to be

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do-it-all general-purpose computing devices that can accomplish a wide range

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of different tasks i mean just think of the endless number of programs that your

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home pc can run from demanding games to

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video editing software to even applications that were written before

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you were born however your Android or

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iOS phone or tablet has a CPU that's capable of executing fewer types of

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instructions and carrying them out in fewer clock cycles so although they are

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simpler and not as general purpose as a laptop or desktop and they're mostly

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only designed to run vetted apps through the app store and play store they are

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much more power efficient it's like how fundamentally any car will get you from

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point a to point b but your aston martin has a large engine and more cylinders

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and more complexity and therefore sucks a lot more gas than your average

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four-banger honda civic that gets you well solid fuel economy and that's about

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it and this greater power efficiency which

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is important in mobile devices to extend their battery life means that phone and

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tablet cpus generate a lot less heat

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which can be dissipated easily without a separate fan for example some phones and

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tablets essentially use much of the device's metal chassis as one big

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heatsink you can actually try it out yourself if you rev up something like a

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3d game and play it for a few minutes but does this mean that you'll always

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need to use noisy fans for anything other than thin portable devices well

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the answer is actually no fans are widely used because they're cheap

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reasonably efficient and they don't require a ton of space inside a

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computer's chassis but fanless pcs do

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exist typically they take the form of desktops

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built with large heat sinks you see without fans heat can still be

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dissipated effectively it just needs to be spread out over a larger surface area

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so that convection can take place naturally i mean that's why CPU coolers

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have all those little fins on them if we just spread them out the air can kind of

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move itself just not very quickly so if you build a heat sink large enough you

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can adequately cool critical components without a fan attached to them not only

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do huge heat sinks exist for cpus but you can also get them for your graphics

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card and there are even passively cooled power supplies albeit typically at lower

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wattages so that's an option if you want a truly silent rig that doesn't make any

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noise other than maybe some coil wine but the big drawback of these solutions

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is that aside from being more expensive they're often quite large one recently

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released passive CPU cooler was dubbed the heart and it won't even fit in most

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cases not to mention that it requires a custom-built setup there are others that

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do fit inside a decently sized standard tower but they still take up lots of

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room inside the case and won't cool as well as a heat sink with a fan meaning

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that you might be limited to lower performance components that output less

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heat so while there are obviously tricks to eliminate the need for fans they're not

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going to be going anywhere in higher performance computing for the foreseeable future just i don't know try

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to think of the racket that they're making as soothing white noise

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