Answering Your Pi 5 Questions | Cooling, Overclocking, Power and More

the pii was announced just a few weeks ago and whilst there is a wealth of information available about the board we kept seeing some common questions popping up in the community so today we're going to try and answer a few of them coming in with our first question does the pi five need cooling the pi five runs hotter than its predecessor so it's no surprise that we've seen many questions relating to the cooling needs of the new board I don't know why you'd want run it without any sort of cooling whatsoever but to answer this we performed some tests without a heat sink or fans or anything attached to keep it cool we did some general web browsing some YouTube and simulated day-to-day usage and after a few minutes the temps were in about the 70 to 80° C range and it wasn't long before we encountered some periodic thermal throttling We performed a 30 minute stress barrier and as you can see the results are not too great with the pi5 thermal throttling in under 1 minute of heavy use so yes you can technically get away without a cooling solution just for General day-to-day usage but running it hot all the time like this is going to really reduce the lifespan and you probably won't be able to get any meaningful overclocks on it I think it is definitely worth at least getting a passive heat sink or the active cooler they're only a few dollars extra and they will extend the life of your pie greatly and that leads us into our next question how does it run with just a passive cooler we run the same usage Tech but this time with the official active cooler but with the fan removed and we also did these tests on a more generic lowprofile heat sink the pi5 performed far better with these and it would stick it around the mid 60° with no thermal throttling whatsoever we also ran a stress Berry for the active cooler no fan setup and found that it took about 10 minutes of heavy load usage to start thermal throttling so the pi5 can happily run with just a decent passive cooler in day-to-day usage it was a tad hotter about about 10° overall but for the same reasons as before a few extra dollars for the active cooler might be a worthwhile investment I really do sound like a Salesman for the active cooler here but it just does such a good job speaking of the active cooler how loud is it a lot of the reasons for using passive cooling is when you need complete silence with very little fan wearing in the background no noise whatsoever now we don't have a sound meter on hand to give you the exact decel reading of noise but we can comparatively paint you a picture of just how quiet this thing is under day-to-day usage just web browsing a little bit of media playback nothing too intense the fan is almost silent if you hold it up to your ear when it's spinning at these low speed it is a struggle to hear it even in a dead silent room I'm going to hold it up to the microphone so you can kind of gauge how loud this thing is this is that first really quiet setting that I'm talking about even if we overclock it and put it under some decently heavy loads we spin it up to the point where you can hear it but it's still really quiet it's about as loud as a ticking watch or as quiet as you can possibly whisper another common set of questions we saw were relating to the overclocking capabilities of the board with the biggest one being how does it overclock we were able to get a St CPU overclock of about 3 GHz and 1 GHz on the GPU we encountered no issues or instabilities even after 2 days of usage at these clock speeds we also performed a 16-hour stress test and had no issues there either whil these numbers are subject to the Silicon Lottery I'd say that you can expect most pifs to be able to achieve these stable clocks very easily an interesting thing however is that the pi5 won't currently let you clock past 3 GHz if you set something higher than that in the config file it just kind of ignores it um this seems to be some lower level limitation and hopefully it will be lifted as I think you can squeeze a little bit more out of this board speed wise how much faster is it when it's overclocked performance seems to scale nice and linearly with clock speed on the pi five 3 GHz is about 25% faster than 2.4 GHz speed wise and after running some CIS bench primes and speedometer 2.1 benchmarks we found about a 25% increase in performance what cooling does it need when overclocked we ran all of our overclocking tests with the official active cooler and it did a really great job of keeping it cool as you can see from the results of our 16-hour stress Berry tests it didn't even reach 70° and only runs about 10° warmer than the standard clock across the board plenty of Headroom to spare with the new pi5 comes a new power supply but can it run on the old Pi 4's power supply from just a surface look the pi5 seems to be able to perform with the old 5V 3 amp power supply with the new power supply being 5.15 amps we ran aist bench Prime speedometer and a Quake 3 time demo and saw no significant differences in Benchmark performances even when overclocked however this should be taken with a grain of salt as this is just a surface look Raspberry Pi has stated that you may encounter some problems with using a lesser power supply on the pi 5 a decent point considering that we're not charging phones here we're powering small computers and we need to do so reliably there is also the major factor that you won't be able to pull a full 1.6 amps through the USB ports without the new power supply you'll be stuck at 600 milliamps which you can't really run a USB powered SSD off that and that there are many accessories not released yet that may make use of this extra power on the new Supply another power related question is the pi 5 more power efficient than the pi 4 the pi5 is faster than the four but also chews through much more power how much does the increase in speed outweigh the increase in power if you've seen our comparison video or any Benchmark video or article you would know that under synthetic benchmarks the five is about 50% faster and about 2 to three times quicker in more real world benchmarks than the four so we picked a benchmark from each category to make this efficiency comparison without any displays or peripherals plugged in we ran CIS bench primes for 250,000 operations which took the five about 60 seconds to complete and took the four about 90 seconds in terms of power usage the pi 5 came in at about 20% more efficient with it using 88 M hours of power to complete it over the pi 4 taking 112 M hours of power for our more real world tests we booted up up speedometer which is a benchmark that simulates some web browsing the pi5 came in at 136 M hours to complete it and the 4 came in at 282 M hours so on synthetic test the pi5 is about 30% more efficient than the 4 and in more real world tests about twice as efficient in terms of power consumption to complete the exact same task a missing in action feature of the pi5 is that 3.5 mm audio composite Jack and no surprise the two comments we have seen over and over again is how do I get audio out of it and how do I get composite out of it now first off audio can be sourced from Bluetooth or HDMI but for those who want a dedicated physical connection an inexpensive USB to 3.5 mm audio jack can be purchased just make sure it's female 3.5 and male USB if you aren't satisfied with a USB solution or want something a little bit more Specky there are also dck hats available for The Rare Breed of makers that still use composite video where looking at UCR Gaming Community you'll be pleased to know that it is still readily available on the pi 5 it was widely reported on launch that the composite video has been removed however there is a tiny two- terminal pinout hidden away between the mppi and HDMI connectors it is now a little bit of an extra hurdle to get composite video out but at least it's still possible and finally can it GPT we we saw an abnormally large amount of questions asking this for some reason we saw a lot of genuine applications of this for people who you know they're off the grid with no internet and limited power where running a large language model like chat GPT would be great for something like a pie we attempted to get GPT for all and mistal 7B running on the pi 5 but we were not successful we have however seen some people get these working on the pi 4S and if we extrapolate the performance to the pi five it's still not great a 1,000w essay written at a GPT 3.5 equivalent looks like it will take hours to generate on the pi five maybe that PCI slot could be used to make this viable who knows but for now I think it's quicker to write my own uni assignments than to let a pi5 do it for me well I hope that at least answered one of the questions you had about the pi five if you still have any more Chuck it in the comments below or head over to our forums we're all makers and we are happy to help till next [Music] time

Channel: Core Electronics

Views: 10,023

Keywords: raspberry pi 5, pi 5, pi 5 launch, raspberry pi, Pi 5 overclocking, Pi 5 overclock, Pi 5 overclock speed, Pi 5 overclock cooling, PI 5 cooling, pi 5 no heatsink, pi 5 passive cooler, Pi 5 active cooler, pi 5 powersupply, pi 5 efficiency, pi 5 vs 4, pi 5 pi 4 comparison, pi 5 composite video, pi 5 audio jack, pi 5 3.5mm, pi 5 gpt, pi 5 chatgpt, pi 5 mistral 7b

Id: Es7gJnJzYJQ

Length: 9min 40sec (580 seconds)

Published: Wed Oct 18 2023