CPU Temperatures under Bootcamp: a real headache for gaming  

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Piqudo
(@piqudo)
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November 3, 2017 3:09 pm  

Hello everybody, long time since I wrote here last time, but glad to see the community keeps growing,

I would like to share some thoughts on my year and a half gaming with e eGPU.

My current setup is a Macbook Pro Retina 15, processor is a 2,5 GHz Intel Core i7, 16Gb RAM and a external GPU via Thunderbolt 2, KFA2 (Galax) GTX 970 OC Mini running with Dell 220 PSU. So far, my next step is to update to KFA2 (Galax) GTX 1070 Mini, but I have not done since I am not very sure, I will notice a performance upgrade as I will keep on playing on 1080p basis (except strategy games like EU4, which I play 1440p).

Anyway, as we all know, there are games which are more CPU intensive than others, but my concerns here are based on CPU temperature and how this will impact the life of the CPU in the mac laptop. In my case, I need the laptop as well for working, so I would not really like to reduce much its life expectancy.

Until not long ago, I had the CPU setting on "high performance" and results were astonishing, until I checked in Intel Extreme Tuning Utility and my CPU was running around 90 degrees for The Witcher 3 on 1080p. Then, I decided to lower it to "balance" which gives me around 80-83 degrees on peaks: I still find it too high for the long term in hours and hours of playing. If I go "power saving" then, is more like I am running the eGPU on an old potato. 

So, I am aware there is ways to lower the voltage to the CPU but I am quite careful with this as I have no idea of how to do so (safely).

In your experience, does the CPU suffer much more when running on the eGPU setup? Any of you suffered catastrophic damage on the CPU due to it? Also, do you know any other way to limit the CPU clock that does not imply using voltage?

Thanks in advance!

 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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theitsage
(@itsage)
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November 3, 2017 3:23 pm  

@Piqudo, thank you for sharing your first-hand experience. CPU overheating and longevity is definitely a concern. What model year is your 15" MacBook Pro? I'd highly recommend opening the back cover to dust it off as well as re-applying thermal paste. Almost every Mac I worked on has too much paste from the factory. Here's an example of what it typically looks like.

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Piqudo
(@piqudo)
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November 7, 2017 9:41 am  

@theitsage thank you for your answer!

My model is the Mid 2015, I think the CPU is 2.5 GHz Intel "Core i7" processor (4870HQ). I have not so far opened any of my laptops, but I can give it a try! I am trying now to lower the voltage to save 5-10 degrees on the CPU, but still on tests to guarantee stability...

I also wanted to open this topic to see which CPU temperatures you guys experience when using the eGPU on an external screen! Just to know if what I am experiencing is the average or by contrast, there is something wrong.

Thanks!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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voljumett
(@voljumett)
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November 9, 2017 2:17 am  

You should try installing fan control, it’s both for Mac and Win, it helped me a lot in both operating systems while gaming!

Apple seem to like having their hardware run hot and silent rather than cool and fast 🙂

MacBook Pro 15" 2016 + HP Omen Accelerator + ASUS Nvidia GTX 1080 A8G


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Piqudo
(@piqudo)
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November 9, 2017 8:37 am  

Hey @Voljumett!

Thanks for your input. I have Mac Fans Control installed, actually fans get to 100% relatively early (around 65 degrees), but that is not quite helping against reaching 90-95°C. Does it help you keeping temperature lower?

Cheers!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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Smackintosh
(@smackintosh)
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November 9, 2017 9:13 am  

I use Macs fan control.  It's a nice app.  You can set the fan speed manually, although your fans might be at max already with those temperatures.  It's the lower end of the fan curve where macs tend to emphasize quietness over cooling.  It can be annoying.

As for controlling temps, there may be a happy medium with setting the max processor state to 99%.  This keeps turbo boost from activating, but may have more power than power saving or balance.  Try it out.

control panel -> power options -> with Balanced selected -> change plan settings -> change advanced power settings -> processor power management -> Maximum processor state ->      select 99%

2016 13" Macbook Pro TB + [email protected] (Aorus Gaming Box) + macOS10.14 (waiting impatiently for web driver)+ Win10 (using goalque EFI boot, Thanks!)


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Piqudo
(@piqudo)
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November 10, 2017 9:14 am  

Hello @Smackintosh,

Thanks for your answer. Yes, I agree, Macs fan control works really nice. I set it to run the fans 100% when still in low temperatures, for the sake of not reaching >90°C, but it doesn't quite work.

I did not know about the turbo boost method. I will give it a try: thanks! For now, using Intel XTU, lowering the voltage has done nicely, temperatures do not reach 90 degrees anymore and almost always stay in the 70-80 range, without any decrease in performance. Nevertheless, is a pain to have to set it up every time  Windows boots up.

Usually, when you are playing with your Macbook pro + 1070, which temperatures does your CPU reach? I mean in intensive games in general...thanks! 🙂

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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Shannmarriottjr
(@shannmarriottjr)
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November 19, 2017 6:08 pm  

Im running the same MacBook Pro as you (2.5 i7, gt750m dgpu) through an MSI Aero itx 1070 onto an external display. When I first got it up and running I was peaking around 95c on my cpu so I cut some of the voltage using ThrottleStop. When running max settings at 1440p, my cpu floats around 80-81c now. 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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Piqudo
(@piqudo)
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November 27, 2017 9:12 am  

@Shannmarriottjr thanks for sharing that!

Given that we have the same computer, may I know how much have you lowered your voltage? In my case I lowered it -100mV with the Intel Tuning Utility (XTU). Alternatively, I have also tried setting the processor max utilisation at 99% in the Windows Powder Settings (so noTurbo Boost would be activated) and results are even better, temperatures rarely reach 80 degrees at the cost of lowering a bit the performance (although barely noticeable)!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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Shannmarriottjr
(@shannmarriottjr)
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November 28, 2017 5:52 am  

I dropped the core and cache to -70mv and the intel to -50mv. Turbo is also disabled. If I’m feeling edgy; I’ll run the internal Mac fans at 90% constant to keep temps around 70c even when being pushed hard. 

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Piqudo
(@piqudo)
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December 1, 2017 10:29 am  

Yeah, it sounds a bit edgy to me! But if you are stable, why not?

Anyway, best way to test is through a good session of gaming, for some hours. I have been perfectly stable with my -100mV but yesterday the system crashed, somehow.

Always good to learn!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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ICULikeMac
(@iculikemac)
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December 1, 2017 11:18 am  

Good thread - quick question is there any harm in running runs at 100% through mac fan control during gaming? That seems to keep my temps relatively cool. 

2018 13" Macbook Air
Late 2012 Mac Mini - MacOS + Win10
Asus XG Station Pro (Vega 64 295TDP)


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Piqudo
(@piqudo)
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December 6, 2017 11:26 am  

@ICULikeMac I do not think there is any harm in running the fans at 100%! How high does your CPU peak? Which games do you use?

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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usafballer
(@usafballer)
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December 7, 2017 6:27 pm  

OP, your temps were fine without fiddling.  These chips are designed to run at just under 100C without issue, for years.  

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Piqudo
(@piqudo)
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December 11, 2017 8:10 am  

@usafballer thanks for your message and thoughts!

I personally, am not so sure about it. I believe these chips can run under 100°C correctly for a certain amount of time, but it is not healthy for them to do so all the time during playing (as I was experiencing). I already know of one persons whose CPUs in MacBooks died after serious gaming with them just within 2/3 years since the computer purchase...might have been bad luck though.

At any case, you might be right but I am not willing to risk it (these are too expensive computers!  😆 ) and playing at lower temps also has the advantage of lower fan noise!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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voljumett
(@voljumett)
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January 24, 2018 4:14 pm  
Posted by: Piqudo

Hey @Voljumett!

Thanks for your input. I have Mac Fans Control installed, actually fans get to 100% relatively early (around 65 degrees), but that is not quite helping against reaching 90-95°C. Does it help you keeping temperature lower?

Cheers!

It helps keep my temps lower, but it looks like you play more cpu heavy games.

Do you have monitor, or do you use the internal display?

I noticed that there is airflow coming down through the keyboard, so I open the lid just a bit, so the screen doesn't activate, and I have the rear end of the MacBook resting on an ssd I'm using, to keep some airflow under the Mac. I'm thinking that they are using the metal casing for cooling, since its metal, and it gets hot as the internal components heats up, so airflow ftw 😛

MacBook Pro 15" 2016 + HP Omen Accelerator + ASUS Nvidia GTX 1080 A8G


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