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53 Posts

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  • Message 11 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-28, 8:18 AM

@kkrathi

 

When you say your PC is set to "max performance", are you talking about the Windows power mode that is accessed via the battery icon in the system tray? That power mode should not be set to "best performance" if you want your machine to run cool and quiet, because in that mode it runs the CPU at max frequency and voltage all the time. For cooler/quieter operation, you should set that slider to "better performance" or "better battery".

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96 Posts

07-24-2008

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  • Message 12 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-28, 21:31 PM

@spocko thank you.  Yes I use the "change plan settings" under power settings in windows 10.  If I used something other than max performance, wouldn't that simply mean that?  Meaning wouldn't the CPU be performing less than what it can? The reason I bought this PC  with the Xeon chip was I need all of the performance for the tasks I am doing.  Perhaps my understanding is wrong.  Please correct me if so.

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96 Posts

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  • Message 13 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-28, 21:34 PM

@leluchev, you said to use "passive" for system cooling policy.  Would that decrease the performance of CPU?  Or it is grayer than that?

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01-04-2018

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  • Message 14 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-29, 0:50 AM
On active, it'll strive to keep temperatures stable by pushing the fans.

On passive, it'll strive to keep temperatures stable by combining low fan speeds with a throttling CPU.

This doesn't necessarily mean that the CPU will perform less on general tasks, just that if your pushing your CPU making it heat up, it'll opt to slow it down rather than crank up the fans.
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  • Message 15 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-29, 0:54 AM
If you're worried about not getting the CPU performance you want, I highly recommend undervolting. I keep my CPU at 100% clock speed and it doesn't overheat with quiet fans. Before undervolting, the CPU would overheat rather quickly and my fans would always crank up.
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  • Message 16 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-29, 1:36 AM

Setting the power mode to "better performance" allows the CPU frequency and voltage to dynamically scale up/down as needed based on the system load. The maximum frequency will be the same as "best performance" mode, so there is no reduction in performance under sustained heavy load, but the CPU can run cooler/quieter under light load.

 

The disadvantage of "better performance" mode is that at the beginning of a heavy task, it will take a little time (a few milliseconds?) for the CPU to scale up to high frequency. In contrast, "best performance" is running the CPU at high frequency all the time, so there is no scale up delay. This can allow "best performance" to be faster if the workload is bursty or intermittent.

 

In practice, I think most users won't notice the performance difference, so that is why "better performance" is the default setting. If you choose to run in "best performance" mode, you can expect slightly better perfomance in some scenarios, but also higher overall power consumption and heat. Take your pick. If you want to minimuze fan noise, then "best performance" is not recommended.

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  • Message 17 of 18

Re: How to reduce the super noisy fan noise in P1?

2019-05-29, 20:19 PM

So for the non-initiated like me, what is the best tool to undervolt a thinkpad P1 - XTU or ThrottleStop?  For P1, is there a set of rules that help identify tweaking only those parameters that need to be?  Or is this all trial and error?

(P.S. In the meantime I will try the other suggestions on power setting changes indicated by others)

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Re: How to reduce the super noisy fan noise in P1?

2019-05-30, 2:22 AM
I recommend XTU if you're just learning, it's more intuitive. However, the only issue with XTU is that your undervolt will often revert without warning. It can be very annoying. I personally use XTU for the trial and error part of it, then set the final undervolt on Throttlestop.

And yes, it's a trial and error thing, you have to find the undervolt that keeps the CPU from crashing under load, but also keeps temperatures cool. I think you can start at -0.100 with your CPU. That's a good undervolt and you don't need to go further than that if you don't want to, but I think you can reach to around -0.120.
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