WEBVTT 00:00:00.240 --> 00:00:05.359 there are two main types of annoying fan noise there's the guy pulling for the 00:00:04.080 --> 00:00:08.400 visitors when you're trying to watch the darn sports ball game 00:00:08.400 --> 00:00:15.920 and the other of course is the roar of your computer's cooling fans 00:00:13.440 --> 00:00:20.560 nearly every desktop and laptop has at least one fan to keep its temperatures 00:00:18.480 --> 00:00:24.240 down and if you've got a poorly optimized cooling solution 00:00:22.400 --> 00:00:28.000 any kind of load on your machine can make it sound like you've got a jet 00:00:25.760 --> 00:00:33.200 engine taking off on your desk now obviously cooling is important it is 00:00:31.039 --> 00:00:38.239 inevitable that computer components will generate waste heat you can learn more 00:00:35.200 --> 00:00:40.559 about why up here but is there a better 00:00:38.239 --> 00:00:45.600 way to get rid of it than using noisy fans or complicated water cooling setups 00:00:43.200 --> 00:00:49.440 which by the way aren't always silent either well there are a couple of common 00:00:47.680 --> 00:00:54.640 types of computers that actually don't use fans at all tablets and smartphones 00:00:52.800 --> 00:00:59.199 it's pretty intuitive that it wouldn't be practical to strap a fan or a water 00:00:57.360 --> 00:01:03.120 cooler to your phone then carry it around in your pocket but the fact is 00:01:01.199 --> 00:01:07.920 that tablets and smartphones are basically just small computers that can 00:01:05.920 --> 00:01:12.320 do most of the things commonly done on a desktop or laptop so how do they get 00:01:10.159 --> 00:01:18.000 away with it the secret sauce here is called reduced instruction set computing 00:01:14.640 --> 00:01:20.080 or risk you see the CPU at the very 00:01:18.000 --> 00:01:24.320 heart of your phone or tablet is built with a very different underlying 00:01:22.080 --> 00:01:28.960 architecture than your desktop at home traditional cpus are designed to be 00:01:26.799 --> 00:01:34.560 do-it-all general-purpose computing devices that can accomplish a wide range 00:01:32.240 --> 00:01:40.079 of different tasks i mean just think of the endless number of programs that your 00:01:37.040 --> 00:01:42.159 home pc can run from demanding games to 00:01:40.079 --> 00:01:46.960 video editing software to even applications that were written before 00:01:43.920 --> 00:01:49.520 you were born however your Android or 00:01:46.960 --> 00:01:54.479 iOS phone or tablet has a CPU that's capable of executing fewer types of 00:01:51.759 --> 00:01:59.680 instructions and carrying them out in fewer clock cycles so although they are 00:01:57.280 --> 00:02:03.920 simpler and not as general purpose as a laptop or desktop and they're mostly 00:02:02.320 --> 00:02:09.039 only designed to run vetted apps through the app store and play store they are 00:02:06.479 --> 00:02:14.080 much more power efficient it's like how fundamentally any car will get you from 00:02:11.280 --> 00:02:18.560 point a to point b but your aston martin has a large engine and more cylinders 00:02:16.319 --> 00:02:21.920 and more complexity and therefore sucks a lot more gas than your average 00:02:20.160 --> 00:02:24.959 four-banger honda civic that gets you well solid fuel economy and that's about 00:02:24.080 --> 00:02:29.200 it and this greater power efficiency which 00:02:27.200 --> 00:02:34.959 is important in mobile devices to extend their battery life means that phone and 00:02:31.760 --> 00:02:37.040 tablet cpus generate a lot less heat 00:02:34.959 --> 00:02:41.200 which can be dissipated easily without a separate fan for example some phones and 00:02:39.360 --> 00:02:44.959 tablets essentially use much of the device's metal chassis as one big 00:02:43.360 --> 00:02:49.040 heatsink you can actually try it out yourself if you rev up something like a 00:02:46.720 --> 00:02:53.280 3d game and play it for a few minutes but does this mean that you'll always 00:02:50.959 --> 00:02:57.920 need to use noisy fans for anything other than thin portable devices well 00:02:55.599 --> 00:03:01.599 the answer is actually no fans are widely used because they're cheap 00:02:59.840 --> 00:03:07.040 reasonably efficient and they don't require a ton of space inside a 00:03:03.519 --> 00:03:08.159 computer's chassis but fanless pcs do 00:03:07.040 --> 00:03:13.040 exist typically they take the form of desktops 00:03:10.480 --> 00:03:18.000 built with large heat sinks you see without fans heat can still be 00:03:15.760 --> 00:03:22.800 dissipated effectively it just needs to be spread out over a larger surface area 00:03:20.800 --> 00:03:27.760 so that convection can take place naturally i mean that's why CPU coolers 00:03:26.080 --> 00:03:32.400 have all those little fins on them if we just spread them out the air can kind of 00:03:29.680 --> 00:03:36.879 move itself just not very quickly so if you build a heat sink large enough you 00:03:34.319 --> 00:03:42.080 can adequately cool critical components without a fan attached to them not only 00:03:39.599 --> 00:03:45.920 do huge heat sinks exist for cpus but you can also get them for your graphics 00:03:43.680 --> 00:03:51.280 card and there are even passively cooled power supplies albeit typically at lower 00:03:48.879 --> 00:03:56.159 wattages so that's an option if you want a truly silent rig that doesn't make any 00:03:53.760 --> 00:04:00.480 noise other than maybe some coil wine but the big drawback of these solutions 00:03:58.400 --> 00:04:05.680 is that aside from being more expensive they're often quite large one recently 00:04:03.360 --> 00:04:10.239 released passive CPU cooler was dubbed the heart and it won't even fit in most 00:04:08.319 --> 00:04:14.720 cases not to mention that it requires a custom-built setup there are others that 00:04:12.640 --> 00:04:19.759 do fit inside a decently sized standard tower but they still take up lots of 00:04:16.799 --> 00:04:23.360 room inside the case and won't cool as well as a heat sink with a fan meaning 00:04:21.840 --> 00:04:26.240 that you might be limited to lower performance components that output less 00:04:25.440 --> 00:04:32.560 heat so while there are obviously tricks to eliminate the need for fans they're not 00:04:31.040 --> 00:04:37.440 going to be going anywhere in higher performance computing for the foreseeable future just i don't know try 00:04:36.320 --> 00:04:42.800 to think of the racket that they're making as soothing white noise 00:04:40.639 --> 00:04:47.440 kind of like this soothing segue to our sponsor squarespace create a beautiful 00:04:45.360 --> 00:04:51.840 website with squarespaces all in one platform their award-winning templates 00:04:49.440 --> 00:04:56.320 make creating a powerful online identity easier than ever each template can be a 00:04:54.479 --> 00:05:00.720 starting point for an incredible range of projects squarespace provides 00:04:58.240 --> 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