I'm a longtime Thinker. Really really like the hardware, BUT, there's something that got me thinking.
For work I got an Intel MacBook Pro 16in with a i7-9750H 2592 MHz (6 cores).
I have a P1G2 that has a i7-9850H 2592 MHz (6 cores).
Both machines have relatively descent discrete GPUs.
The P1 pretty much all the time is hot and the fans are blasting, even when doing only light browsing (like one tab with Reddit).
On the Mac I have been using a Windows virtual machine as my daily driver. I almost never hear the fans and the battery last more than double the P1. This is while all the time running a virtualized machine!
How can this be? I never tweaked the power profile of the Mac, nor should I have to do it with the P1.
Could it just come down to systemically bad power management design for the P1 line?
Side note my pc runs flawlessly all the same, I know the issue isnβt bottlenecking I have a RTX 3070 and 64 gigs of DDR4 RAM running at 3300β¦Still though?
Can anyone in this field give me an idea how tricky it will be to find a job in R&D? I love this field and want to get a foot in the door.
I am currently getting my masters in ME with a specialization in thermofluidics. I'm working full time at a medium sized corporation as part of a coop program and finishing my thesis (on thermal interface materials) while doing a pretty heavy duty CFD based project using flotherm/icepak/ansys to investigate some cold plate/immersion cooling ideas. However I have some concern that my company has a reduced need for a thermal expert. Would it be difficult to find employment in this field elsewhere? Also I have to assume the job market for thermal engineers will only increase, right?
If you want to test it yourself, install and play Genshin Impact on your Pixel 6/6 Pro. Then do the same on any iPhone, Samsung Galaxy, OnePlus, etc.
In general, my Pixel 6 throttles more and harder than any other phone I've used while under load. All phones not named Asus ROG phone will throttle quite a bit once you start throwing a pretty demanding game at them and I purposely selected Genshin Impact because it's arguably the most demanding mobile game around these days. Genshin Impact can make iPads throttle and that's saying something. But compared to other phones, my Pixel 6 gets really hot really quickly and then throttles to the point where the game becomes unplayable in less than a minute due to a framerate that drops into the teens and constant lagging and hitching as the Tensor SoC hits thermal halts.
Teardowns of the Pixel 6/6 Pro show that the thermal dissipation solution inside isn't very good, which you can easily feel because one spot on the phone just below the camera bar gets really hot so it's not spreading heat adequately over the device's surface. Also the Tensor SoC itself isn't very efficient and runs very hot because of the 2x Cortex-X1 configuration combined with the oversized ARM Mali G78-MP20 GPU cluster. I'm assuming Google made the GPU cluster very big to benefit animation smoothness and other burst type activities, but it quickly overheats and throttles back when faced with a sustained load like a demanding game. The Exynos 2100 International version of Samsung Galaxy S21, despite having a smaller MP14 GPU cluster, sustains a higher framerate for longer periods of time because it simply doesn't overheat as much. Of course the North American version of S21 uses Qualcomm Snapdragon 888 and in general Adreno GPU is miles ahead of ARM Mali in both performance and efficiency.
It is unfortunate that Google doesn't really have anyone else to work with on semi-custom ARM SoC design besides Samsung. Qualcomm is take it or leave it, they will not add Google's custom AI/ML silicon to their designs. The others are too small or in China, like Mediatek and HiSilicon/Huawei. So it's Samsung or nothing. Too bad Exynos is just not very good compared to Snapdragon, to say nothing of the vast superiority of Apple Silicon. So Google is kinda stuck, but even so decisions like cramming a huge GPU cluster into Tensor while not having a good heatsink design in Pixel 6/6 Pro are entirely Google's responsibility.
Anyways, Genshin Impact sucks on Pix
... keep reading on reddit β‘If interested, there is also a project tutorial, including code files, STL files, and instructions:
i hope not because i just ordered the base s21 and excited as heck for it to arrive but worried about this issue i hear people saying. donβt know if i should believe it tho
hey! recently decided to try openSUSE for the first time, having messed around with debian/arch based distros in the distant past. very pleasantly surprised at how stable and relatively smooth things have been doing.
i use an msi laptop with nvidia/intel graphics and an intel 8th gen i7 cpu.
ive set a couple of goals: battery life near on par with windows, and im reasonably happy with what i've achieved so far thanks to tlp and prime-select. im sure it could be optimized even further
the second goal i am working on is comparable game/cpu heavy task performance. my msi laptop struggled with this even in windows, but using "turbo boost" mode in the proprietary msi application to set my fans blasting like jet engines, and using throttlestop to decrease the limit of turbo boost by a few hundred mhz i managed to get to a point where i can play heavy games without throttling
ive managed to solve the fan control, courtesy of isw (https://github.com/YoyPa/isw). this works even better than windows in the sense that it can be automated. controlling the clock speed is simple im sure, but i hope i can have some guidance.
the meat of the question:
if i want my cpu to run at the highest possible clock speeds without limiting, what is the best way of achieving this? i am running thermal daemon in tandem with tlp. it seems like thermald may be a bit more aggressive in limiting clock speeds than windows. i cannot configure thermald because it will not generate a config on my system. should i stop using thermald and rely solely on tlp and my isw fan profiles? is there anything else i should consider?
i will likely start experimenting soon, but if anyone else has solved this problem in an efficient manner it would be nice to know :D thanks!
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So i9 has vapor chamber cooling which is supposed to be better but i9 also outputs more heat and comes with the 3080 RTX which is also much more heat generating at 100w (not to mention the battery life hit)
so since both i7 with 3050 rtx and i9 with 3080 rtx are plenty for my needs I would choose the one that manages heat better and doesn't do the constant fan variations from low to max that my x1 extreme gen 1 does under linux, which can drive you crazy in the long run.
So, what is better heat management wise, i7 with 3050 rtx and normal cooling OR i9 with 3080 rtx and vapor chamber cooling?
Ordered one with the M1 Max 24 GPU cores. Is the thermal management really that bad? If it gets hot I donβt care, but do the fans spin off when doing light things? Could someone please try to explain?
As you may already know, to cool anything you need to move heat away from it (Duh). To transfer heat you need surface area. But from the square-cube law follows, that the larger a creature is, the less surface area it'll have compared to it's volume, meaning that it will have a harder time to stay cool.
Now, dragons are usually quite large, which means that they too will get problems cooling themselves if the air temperature gets too high, the sun is burning down on them or they're just running around. Which is why i'm looking for ways for them to cool down, without using magic. My thoughts so far:
- Sweating: Not really that useful, as scales and similar natural armor will be in the way.
- Panting: Should be possible, but i don't think it would be enough for a dragon. Plus it'll look really funny to have a dragon panting all the time in warm weather.
- Wing cooling: The elephant's way of cooling and so far my best bet at a useful solution. The wings are comparatively thin and offer a large surface area with little volume. They are also unobstructed by armor, so sweating is possible here. Downsides are, that it won't work when the wings are folded, so if cooling is needed, the dragon would have to always stretch them out a bit and possibly even flap them. Larger blood vessel would also be needed inside the wing membranes to move the heat from the core to the wings, which poses a vulnerability, because wing injuries may lead to blood loss.
- Water cooling: Simple, yet effective. Just jump into the ocean or a lake from time to time. This would of course restrict dragons to locations close to larger bodies of water in warmer climates.
- Staying out of the heat: Not a cooling solution, but still very effective. Restrict the dragons to colder climates. If they don't get hot, they don't need to cool themselves. Another possibility is to stay in the cool underground during the day and only come out during the night.
All of these methods can of course be combined. None of this applies to dragons who like to live inside a volcano, obviously.
What do you think? Have you got any other ideas or maybe examples where this topic has been addressed at all?
Had some thoughts about doing a bit of light fiction around that Skip Drive concept I wrote up some time ago.
As a recap, it is a FTL propulsion system that involves jumping backwards to the deep past of the universe, where expansion has had less time to stretch out distances, and when STL travel in that time gets you where you are going (or the power levels needed to stay deep backtime grow too weak), the ship snaps back to present time, in a position corresponding to the one they were last in, in the deep past. Thus travelling potentially insane distances in apparent FTL without ever going faster than light.
Why thermal management? The more power you invest in a Snap, the deeper into the past you go. The deeper you go, the hotter the universe is, so you need to carry considerable amounts of refrigerant gases and deployable radiators in you ship, which is likely painted in IR reflective paint to reject as much heat as possible while backtime.
As a result, larger journeys by Snap Drive result in taking in considerable amounts of heat, and having to expend energy to keep the ship from immolating itself and the crew from being baked alive.
Are these refrigerant gases "rechargable" with long "cold soaks" in the present day universe, assuming you are not nearby any star (or are in the shadow of a planet, moon, or large asteroid)? If so, what is the most logical refrigerant to use for a ship that is equipped with this sort of clarketech?
Note: This is used in the science fiction of a civilization in my worldbuilding. Not even that civilization could pull off a stunt like this, nor should they considering the paradox that could be invoked (unless time travel does not cause paradox, which is possible considering we do not know for certain that time travel paradoxes can happen, but that is another discussion entirely). In general terms, I tend to agree with Isaac, FTL cannot happen. But it can be fun writing about it anyway.
i hope not because i just ordered the base s21 and excited as heck for it to arrive but worried about this issue i hear people saying. donβt know if i should believe it tho
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