[Tom's Hardware] Microsoft Confirms Surface Pro 6 and Surface Book 2 Processor Throttling Issue - Overclock.net - An Overclocking Community

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[Tom's Hardware] Microsoft Confirms Surface Pro 6 and Surface Book 2 Processor Throttling Issue

 
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post #1 of 7 (permalink) Old 08-18-2019, 10:08 AM - Thread Starter
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[Tom's Hardware] Microsoft Confirms Surface Pro 6 and Surface Book 2 Processor Throttling Issue

Source: https://www.tomshardware.com/news/mi...sue,40172.html

Quote:
Microsoft has confirmed that some Surface Pro 6 and Surface Book 2 users have been affected by processor throttling following a recent firmware update. The processors of the ultra-slim devices throttle down to 400MHz and remain that way, even after shutdowns and restarts.

Surface Pro 6 and Surface Book 2 users have been posting information about the slowdown on Reddit for the past week. Today, Microsoft acknowledged the issue in a statement made to the website TechRepublic.

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post #2 of 7 (permalink) Old 08-18-2019, 11:32 PM
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I just bought a couple of Raspberry Pi 4’s and it’s looking more and more like they will actually compete with Windows devices for basic functionality (I’m only half joking).
Much as I enjoy having X86 in a moderately portable device, Win 10 on a tablet has been a cacophony of frustrations, those mostly being OS limitations with a touch interface but the system does slow down or hitch fairly commonly.
I know I should keep expectations in check but it would be really hilarious if a $50 ARM system can keep pace with Windows on Intel’s modern mobile solutions.
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post #3 of 7 (permalink) Old 08-19-2019, 12:32 AM
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their cooling is garbage anyways, it always throttles, the question is "just how bad it throttles?"

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post #4 of 7 (permalink) Old 08-19-2019, 06:10 AM
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Around about now, ill say that im even more happy that i have blocked all windows updates on my domain as im running firmware from about 18 months ago

Quote: Originally Posted by TK421 View Post
their cooling is garbage anyways, it always throttles, the question is "just how bad it throttles?"
I use ThrottleStop to just undervolt a bit and boom, great performance at reasonable temperatures. Temps dont go over 75*C even while gaming or doing some strenuous tasks.

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post #5 of 7 (permalink) Old 08-19-2019, 11:22 AM
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Quote: Originally Posted by SystemTech View Post
Around about now, ill say that im even more happy that i have blocked all windows updates on my domain as im running firmware from about 18 months ago



I use ThrottleStop to just undervolt a bit and boom, great performance at reasonable temperatures. Temps dont go over 75*C even while gaming or doing some strenuous tasks.
If it can't sustain full boost on all cores then it's garbage cooling.

Not to mention the iGPU will add another 11-15w to the heat output.

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post #6 of 7 (permalink) Old 08-19-2019, 11:28 AM - Thread Starter
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Quote: Originally Posted by TK421 View Post
If it can't sustain full boost on all cores then it's garbage cooling.

Not to mention the iGPU will add another 11-15w to the heat output.
This isn't an actual thermal issue. It's a firmware problem.

Quote:
For now, redditors have seemed to pinpoint the Intel CPU flag BD PROCHOT (bi-directional processor hot) as the culprit of the throttle lock. The flag tells the processor to throttle down in an attempt to keep the system temperature from overheating. However, the BD PROCHOT can be triggered by other components or peripherals, not just the CPU. Ideally, this works to prevent other components around the CPU from overheating due to the CPU’s thermal output. In this instance, BD PROCHOT is being activated even when CPU temperatures are low.

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post #7 of 7 (permalink) Old 08-20-2019, 12:18 AM
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Quote: Originally Posted by WannaBeOCer View Post
This isn't an actual thermal issue. It's a firmware problem.
I know it's not the cooling issue, I'm just saying that regardless of what they do the cooling will still make the machines throttle below advertised boost speeds under CPU load.


BD Prochot can be disabled by Throttlestop.

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