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kbb72

macrumors newbie
Original poster
Mar 9, 2021
1
0
Hi folks!

I recently got a MBP 16" i9 only to discover that I hadn't researched deep enough to know about the heating issues. I haven't really been following Mac in recent years.

Immediately, I noticed the fans running more than my 2017 MBP 15 i7, and as I do a lot of audio recording, I was concerned. I downloaded Turbo Boost Switcher, and did some more audio optimizing. Long story short, it runs very cool now. For work-related stuff (I'm an Analyst), it's usually running at about 50-60C (according to Turbo Boost Switcher), with the fans sub 2k rpm. That's pretty much only Chrome, but running a lot of analytics processes on those tabs. I've seen it jump up to around 60-65C-ish during Google Meet meetings or Zoom (with both audio and video). Logic Pro X is different story, obviously, but fan noise doesn't seem any worse than my 2017 quad i7 MBP and temps are so far top out around 75-80C. In either work or music mode, I'm using all four ports for charging, and external drive, an audio interface, and to connect to my trusty old TB display. If use it in lap mode, the temp drops down to the mid to low 40'sC....I may have seen it in the '30s. That's all with Turbo Boost enabled.

I guess I'm just wondering I haven't found the news yet that the super awful fan and heat issues were fixed in a Catalina update? It seems these issues weren't that limited to specific machines...so I don't think I have a unicorn. Then again, even in Logic I've yet to see the total CPU load exceed 25%. During work related activity it's usually around 5%. Maybe I'm just not the power user I thought I was? So far, it's just a wonderful wonderful machine compared to the vast majority of my past macs (going back to Apple IIC and on to Pismo Powerbooks, etc. I'm old!).

Thanks!
 
Last edited:
Well, the i9 is a monster. It will draw as much power as you allow it to use. The 16" has a total power budget of 100W with certain boost times. If the AMD GPU is offline, the i9 can easily eat that alone.

Chrome is a resource hog. It is known to cause all sorts of issues on Macs. Also to heat the machine up.

The i9 can heat up to almost 100C with just one core full turbo.

If you use an external monitor with the Lid open, then the AMD GPU will cause major heating, except when using the 5600M. 5300M and 5500M will cause a lot of heat just for driving the external display as the VRAM runs on full clock and GDDR6 is power hungry.
 
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