Trying to understand EDP OTHER and BD PROCHOT warnings

[Toan]

Hi everybody,
I have an old Lenovo Ideapad 700 15-ISK (i7-6700HQ, intel HD graphics 530, GTX 950M, upgraded from 16 to 32 gb ram, 970evo nvme and 1tb sata hdd).
In these last months I decided to approach undervolting to get lower temps and probably also lower consumptions. I think I achieved quite good results even if I still have some doubts. BTW, this is all thanks to TS and this forum (unclewebb in particular) for all the "support" and explanations found.
Back to the question, I am really struggling to understand random warnings related to ring EDP OTHER and BD PROCHOT on CPU and GPU (I suppose iGPU since according to my understandings dGPU is not shown in TS limits windows).
I have really no clue about BD PROCHOT, but I found something related to EDP OTHER that I want to share.

Trying to recap quickly, hope this list with sub-point will be enough clear:
- Problems are almost similar with stock UV, power plans, etc., so not UV related
- Now it is quite cold, so it seems that I never triggered a really high temperature, so no thermal problems, often I barely hear the fans now
- BDPROCHOT warning is triggered only in idle, really often for both CPU and GPU (sometimes only CPU), but I haven't found a real reason
- EDP OTHER seems to be triggered mainly on idle and seems to be related to iGPU:

- iGPU benchmark without CPU usage triggers EDP OTHER warning but there are differences according to power plans and power overlay modes (Win10 slider):​

- balanced power plan with better performance power mode (set to central position of the slider) triggers the warning and the red flashing error giving 31 fps​

- balanced power plan with max performance power mode (set to right position of the slider) triggers the warning without the red error giving 29 fps​

- high performance power plan triggers EDP OTHER constantly​

- balanced power plan has balanced setting for graphics while high performance power plan has maximum performance setting for graphics (HWiNFO shows also GT fuse limit triggered) and not only Ring: Max VR Voltage, ICCMax, PL4)​

- iGPU benchmark with CPU usage does not trigger EDP OTHER warning and gives 1-2 fps boost (stays around 30-31 instead of 28-29):​

- no matter the plan or the settings, CPU usage stops the warning immediately.​

- the iGPU setting in power plans is somehow responsible of EDP OTHER and trigger also GT fuse limit in HWiNFO

Logging data with TS and HWiNFO was not useful, I wasn't able to figure out anything else. But rarely, HWiNFO reported also IA: Electrical Design Point/Other (ICCmax,PL4,SVID,DDR RAPL).

I think I read almost everything here about this topic, I know that the first suggestion should be to try increase IccMax value but not completely sure which one and moreover, I think VRM is somehow "fragile" in this laptop, and don't want to risk since it is not completely clear to me how Lenovo handles things here, but I would like to better understand the issue and, with the help of more experienced users, potentially find a solution (if there is something to solve).
Moreover, these are the specs that I found on intel documentation (mine in red) and the values are quite respected but I wasn't able to find values for other components:

While about ThrottleStop, these are the values (please, take a look also to the UV, if you have some suggestions, It seems stable but don't know exactly how to handle the SA)

TS main window settings - nothing changed from default

CPU (Core & Cache equal) - only offset voltage changed from default

iGPU - only offset voltage changed from default

SA - only offset voltage changed from default

TS TPL window - nothing changed from default

Thank you for the help and the patience to read all this

 

[unclewebb]

For the core and the cache I always recommend setting IccMax to the max which is 255.75. There is nothing else you can do if that does not fix EDP OTHER throttling or warnings in Limit Reasons.

For BD PROCHOT throttling, clear the BD PROCHOT box on the main screen. I have no idea why some throttling happens. I just know how to try and fix it.

I would also check the MMIO Lock box which is near the top right corner of the TPL window. Checking the Speed Shift box in this window is a good idea too.

Is your -189.5 mV offset undervolt for the core and the cache 100% stable? Try running the ThrottleStop TS Bench 960M test. Stop this test if it reports any errors. If you are stable, great. If not, add some voltage.

No need to read books and Intel manuals. Attach a ThrottleStop Log File if you need help.