12-07-2019 05:39 AM
This functionality is implemented in and enforced through Lenovo APS (Active Protection System) driver;
This is interesting. Using HWiNFO, the APS Sensor is tied to the Nvidia GPU temps.
12-07-2019 06:02 AM
@ThinkpadIL: Definitely agree, I have been building and installing PCs for a long time now and I didn't have a clue that there is a hidden slider that would render my PC useless in case I need performance. How would your average Joe know about and find it? To be fair, though, this is partially also a result of Microsoft switching UIs, I was trying to use the old energy options where you don't find that slider. Things will hopefully straighten out soon on that front.
@nvsnow: Yeah, my benchmark results were even worse under throttling, down to 15-20% fps. One thing I wonder about RTX3000 clock ratings though: There seem to be wildly different cards out there. Mine officially clocks at 945 / 1380 (boost) and 7000 for the memory. On top of that, when I look at the clock in Nvidia Inspector, it often says it's running around 1600-1800 for the GPU clock, which is way above its boost level. Comparing benchmarks with notebookcheck.com's numbers also suggests I'm seeing better perfomance than I "should". Positive anomaly, for once, but very strange.
12-07-2019 07:57 AM
@Branagh: the difference in RTX3000 performance compared to notebookcheck could be explained by updated BIOS or updated driver, or different power management settings
12-07-2019 08:50 AM
12-07-2019 11:59 AM - edited 12-07-2019 11:59 AM
My theory about this APS mess is that Lenovo has to abide by regulations (don't know if these are consumer regulations or something that's needed in order to fulfill a contract). These regulations specify the maximum allowed surface temperature of the laptop. So the choice Lenovo has is either throttle the performance when some sensor is reporting too high a temperature, or invent some other way to prevent skin contact with hot surface - this is where APS comes in. Of course, their first, second, third and tenth take at implementing this all have bugs but hopefully eventually they will make it work.
12-07-2019 01:25 PM - edited 12-07-2019 01:34 PM
This is indeed correct - there are regulations which regulate various temperature specifications for various devices;
I can't find one, however, that specifically stipulates temperature for a laptop while on the lap;
Without such stipulation this theory won't stand, as what is allowed for stationary (non lap) should also be allowed for on the (lap);
Although, it is possible there is a regulations, regulating lap temps in particular; Especially in Europe;
Another observation: Lenovo APS is a combination of various sensors - temps, motion, gyro; Those aren't visible in hwinfo or similar afaik; There is an open source project concerning this system (will let read out, show orientation, e.t.c.);
According to person working on this project, laptop may limp out, not only due to temps or motion, but also due to orientation. [ though he was talking about lenovo APS implementation in laptops in general, not specific to P73/53 ]
Don't have a link handy, but this is easily googlable
12-07-2019 02:39 PM - edited 12-07-2019 02:41 PM
Hi, I am considering to reorder a P53 (i9 with RTX4000 or Xeon with RTX5000, 64GB). Have not decided which 4K screen option as I encountered issues in both OLED (ugly grids on screen, non-solid ugly looking letters due to the grids, poor battery life) and standard 4K screen (bad backlight bleeding, large gap between the LCD and the keyboard area), wrobble at the bottom, etc.
So, have these perforamnce/throttling issues been solved? I like the P53 because is does not have noisy nor high pitch fan noise as other Lenovo laptops I have used. However, if there are serious performance issues, I am considering to just get a Yoga C940 15" and remote login to a workstation at home.
12-07-2019 03:54 PM
I'm not sure that any solution will satisfy your critical criteria of perfection. The OLED screen is not ugly, it just could have been better. The power consumption could be less, same or more depending on content being viewed. I'm getting about 4.5 to 5 hours on battery with my work using the Intel internal GPU. Good luck with your choice.
12-07-2019 04:30 PM - edited 12-07-2019 04:32 PM
I think one user mentioned that he did not see the grids. Sales told me that this has been fixed. Not sure if this is really true. I cannot understand why there is a grid in this model. Other Thinkpad and Yoga I used have touch screen but there is no ugly grid.
12-07-2019 04:37 PM
I have trouble seeing the dots under normal circumstances, but they are still there. If it is true that the displays have been fixed, then I'll return my unit for replacement. Net, I don't believe that the issue had been eliminated.