incendery

Hello! this is a behaviour of the embedded controller causing the CPU to throttle when GPU load is applied, unfortunately this is seemingly only solvable with premamod EC firmware but that is practically impossible to find:( throttlestop will do fine as it continuously overrides the register change the EC makes

this sounds similar in issue to what I experienced, I believe there is an issue with one of the drivers that gets automatically pulled and it's congestion on ambush, if you put your system under load and hold a key then release do you continue to see keystrokes for a short time after releasing?

after more testing I have realized the bios change does not fix the issue 😞 I will be doing more testing with different drivers to try and diagnose it

My memory training isn't nearly as happy on the 1.05 bios! 3200mhz errors a lot when previously on xmp it was rock solid stable for months. I am stable now at 2933mhz but I wonder if the keyboard can be ported forwards to the 1.07 bios or perhaps the memory initialization backwards to the 1.05 🙂

It's been a little bit since the last update, I have been busy moving countries so not a lot of work done on the laptop 😄 I found an issue with the bios version based on 1.07, due to some problem with how the keyboard is read and buffered (I believe) there is an issue where a key held for a while will have ghost keypresses when it is released. The keyboard issue persists between seperate installs and is not present on the 1.05 version so I believe it is something with how the EC communicates with the system on differing versions. I am currently in the process of installing upgraded fans from TaoBao, I made the mistake of not ordering the DC to PWM converters from the seller so I must make my own which is taking some time, I will hopefully have more updates on this within the next month 🙂 Stay safe, stay happy.

if you look for the service manual for your model clevo there is probably a schematic you can use to help troubleshoot 🙂

I do plan on talking to the VRM at some point, I have recently moved countries so my time has been a little short and I've been using the laptop as my main PC now 🙂 I salvaged The 20mOhm shunts from some parts donor boards I had laying around at the time, nothing too specific I don't know if my machine ever supported gsync and haven't tried getting it working, using NVIDIA custom resolution settings I have the display overclocked happily to 100hz instead 🙂

Yes I did shunt mod it 🙂 I was quite conservative with it as I want it to last a good long time. I added 20mOhm shunt resistors on top of the 5mOhm already on the card so in theory (without talking to the vrm itself) it should be 180w. The performance is quite good and beats 165w dynamic boost cards in GPU benchmarks

Part 2: BIOS modifications. A late update since the last post, life has been busy 🙂 To preface this post, I am firmly a beginner with BIOS modifications and my understanding is limited 🙂 I am cobbling together information from many smart people to make this work. My goals for the BIOS modifications are: Coffee lake support. Power limit removal. Functioning audio drivers with working headphone amplifier. Native Nvidia driver installation without INF modification. 1 + 2 For Coffee lake support and power limit removal I am using Dsanke's fantastic 1.07.24 bios based on the P775tm1, while this functions mostly flawlessly it does have issues where the audio drivers no longer work and the powerful dedicated headphone amp doesn't switch on. 😞 From what I could understand in the smxdiy thread by Dsanke this has to do with the bios 1.07.24 changing from HDA to UAD support. 3 Initially I was dissapointed that this bios didn't work properly with the audio drivers and I would like to have my headphone amplifier working 😄, the symptoms of non functional amp + spdif LED always on were very similar to an issue I caused when trying to initially get native Nvidia driver support following on a Post from user SRS2236, I had changed the subsystem ID value for the intelHD audio device in error when figuring out which was for the GPU! this mismatch of IDs stopped the Realtek driver from working properly similarly to how Nvidia driver needs an INF modification. With this hunch I had a look at the boardID file in the bios provided by Dsanke and sure enough the subsystemID for intelHDaudio was set to that of the P775tm1 not the P775dm3, changing this from 7709 to the correct ID of 7705 allowed me to install a realtek UAD driver and retain working audio with a functional headphone amplifier! The only issue I was unable to resolve is that the headphone amp no longer lowers volume automatically on detecting headphones so care must be taken not to deafen yourself 🙂 Link to original post with hex values to change 4 the Nvidia driver has a set list of matching device and subsystem IDs, if your combination of IDs isn't valid then it will fail to install and require NVcleaninstall or other methods to add your combination, while this works fine it also requires extra hassle along with no automatic updates and issues with anticheat solutions. The fix for subsystem ID mismatch is to change the subsystem ID 😄. once again referring to this post for clues we can see the BoardIDPEI module is where the subsystem ID for the GPU originates, and if we can change our ID to 7715 (instead of 7705 or 7709 from p775dm3 and p775tm1 respectively) then we can trick the Nvidia driver into installing without any questions asked because 7715 is the subsystem ID for the clevo X170km which shipped with a 3080. after a bit of trial and error the values which need changing will be these 2 values (if your bios is p775dm3 derived it will be 0577, if p775tm1 derived it will be 0977) Change them to 1577 as below. E8 00 59 74 0C 48 75 10 C7 45 FC 58 15 15 77 EB DE 10 E5 1B 74 4D C7 44 24 0C 58 15 15 77 C7 44 After changing the IDs I have had 0 issues regarding GPU drivers, automatic updates etc all work flawlessly 🙂 Issues / future plans I've become aware of the CPU throttling behaviour when any GPU load is detected 😞 this isn't too problematic as throttlestop can override this behaviour but I would like to solve this. From research and my limited understanding it seems to be a function of the EC causing this throttling, when the GPU is loaded bit 38 in MSR 1A0H is flipped (Turbo mode Disable) and when load is removed it reverts back after a few seconds, Prema has to my understanding overcome this with their custom EC firmware which is not available unfortunately, I reached out to Prema but did not hear back from them (I respect their decision not to release the files due to personal or professional reasons). My plan going forward is to take some time to learn more about reverse engineering and see where that takes me 🙂 Thank you for reading!

amazing scores!! I can only dream of CPU temperatures that low 😅😅😅

intruiging, thanks for sharing!

I suspect it may not be a vbios thing at this point, it may be something with the EC and enabling the GPU.

enable above 4g decoding, that should do it 🙂

interesting! strange the tongfang vbios didn't work with the es CPUs 🤔

MXM is quite dead in the consumer space unfortunately 😞 this is a card from the last true DTR clevo with socketed CPU and GPU (X170KM)