lenovo ideapad 15ARH015 might be power braking

[voxell]

I've been having random thermal-throttling-looking performance drops in the last month so I dumped some info in HWiNFO64 when I was having the issue. Here's the diff of both dumps:
(- minuses are problematic dump, + pluses are normal dump)

- <TR><TD CLASS="ds" COLSPAN=3><I>[General Information]</I>
- <TR><TD><TD>CPU Power Limit 1 (Long Duration)/Processor Base Power (PBP):<TD>Power = 6.00 W, Time = 30.00 sec [Unlocked]
- <TR><TD><TD>CPU Power Limit 2 (Short Duration)/Maximum Turbo Power (MTP):<TD>Power = 6.00 W [Unlocked]
- <TR><TD><TD>CPU Current:<TD>399.3 MHz = 4.00 x 99.8 MHz @ 0.7312 V
- <TR><TD CLASS="ds" COLSPAN=3><I>[PCI Express]</I>
- <TR><TD><TD>Current Link Speed:<TD>2.5 GT/s
- <TR><TD><TD>L0s Exit Latency:<TD>256 - 512 ns
- <TR><TD CLASS="ds" COLSPAN=3><I>[PCI Express]</I>
- <TR><TD><TD>Current Link Speed:<TD>2.5 GT/s
- <TR><TD><TD>Active State Power Management (ASPM) Status:<TD>L0s and L1 Entry
- <TR><TD><TD>L0s Exit Latency:<TD>256 - 512 ns
- <TR><TD CLASS="ds" COLSPAN=3><I>[Features]</I>
- <TR><TD><TD CLASS="dn">Bus Mastering:<TD CLASS="dn">Disabled
- <TR><TD CLASS="ds" COLSPAN=3><I>[Video Card]</I>
- <TR><TD><TD>Video Bus:<TD>PCIe v3.0 x16 (8.0 GT/s) @ x8 (2.5 GT/s)
- <TR><TD><TD>Graphics Processor Clock:<TD>300.0 MHz
- <TR><TD><TD>Video Unit Clock:<TD>540.0 MHz
- <TR><TD><TD>Graphics Memory Clock:<TD>101.2 MHz (Effective 810.0 MHz)
- <TR><TD CLASS="ds" COLSPAN=3><I>[Performance]</I>
- <TR><TD><TD>Graphics Processor Clock:<TD>200.0 MHz
- <TR><TD><TD>Graphics Memory Clock:<TD>400.0 MHz (Effective 800.0 MHz)

+ <TR><TD CLASS="ds" COLSPAN=3><I>[General Information]</I>
+ <TR><TD><TD>CPU Power Limit 1 (Long Duration)/Processor Base Power (PBP):<TD>Power = 54.00 W, Time = 30.00 sec [Unlocked]
+ <TR><TD><TD>CPU Power Limit 2 (Short Duration)/Maximum Turbo Power (MTP):<TD>Power = 65.00 W [Unlocked]
+ <TR><TD><TD>CPU Current:<TD>4267.3 MHz = 42.75 x 99.8 MHz @ 1.4125 V
+ <TR><TD CLASS="ds" COLSPAN=3><I>[PCI Express]</I>
+ <TR><TD><TD>Current Link Speed:<TD>8.0 GT/s
+ <TR><TD><TD>L0s Exit Latency:<TD>512 ns - 1 us
+ <TR><TD CLASS="ds" COLSPAN=3><I>[PCI Express]</I>
+ <TR><TD><TD>Current Link Speed:<TD>8.0 GT/s
+ <TR><TD><TD>Active State Power Management (ASPM) Status:<TD>Disabled
+ <TR><TD><TD>L0s Exit Latency:<TD>512 ns - 1 us
+ <TR><TD CLASS="ds" COLSPAN=3><I>[Features]</I>
+ <TR><TD><TD CLASS="dn">Bus Mastering:<TD CLASS="dn">Enabled
+ <TR><TD CLASS="ds" COLSPAN=3><I>[Video Card]</I>
+ <TR><TD><TD>Video Bus:<TD>PCIe v3.0 x16 (8.0 GT/s) @ x8 (8.0 GT/s)
+ <TR><TD><TD>Graphics Processor Clock:<TD>1350.0 MHz
+ <TR><TD><TD>Video Unit Clock:<TD>1245.0 MHz
+ <TR><TD><TD>Graphics Memory Clock:<TD>1500.2 MHz (Effective 12002.0 MHz)
+ <TR><TD CLASS="ds" COLSPAN=3><I>[Performance]</I>
+ <TR><TD><TD>Graphics Processor Clock:<TD>400.0 MHz
+ <TR><TD><TD>Graphics Memory Clock:<TD>1200.0 MHz (Effective 2400.0 MHz)

I'm suspecting power braking but I've never really seen my temparatures go up that much. This happened like 4 times since the last month. Only happens when playing games for a while. After the problem, even Windows starts struggling to do stuff, such as alt+tabbing or opening file explorer.

 

[Martin]

You need to watch the sensors screen to determine what's going on. Notebooks can reduce performance/clocks also based on so-called skin-temperature limits (e.g. that your keyboard won't become too hot due to heat transfer from hot components inside).

 

[voxell]

s

You need to watch the sensors screen to determine what's going on. Notebooks can reduce performance/clocks also based on so-called skin-temperature limits (e.g. that your keyboard won't become too hot due to heat transfer from hot components inside).

I don't really understand the sensors screen too much, but I know for a fact that these 3 on the CPU section were set to No when the throttling happened. I wish I checked the others too.

I've updated the post with the complete dumps for further research. It may have the relevant sensor info in the lagging dump.

 

[Martin]

Then you need to check other limits (best those in %) if any of them reaches >=100%.

 

[voxell]

Thanks a bunch for the help. Will do. I will update this post when it happens again.

 

[voxell]

Fortunately I was able to reproduce the issue by overheating my laptop intentionally. Here are the GPU throttling sensors:
Attached zip file is the sensor log. It seems to happen multiple times, but I noticed the one towards the end of the log.
Gpu thermal limits suggest a temparature of 87 degrees, and sensors have observed a maximum temparature of over 90.